When did they stop using flat head screws in furniture

When did they stop using flat head screws in furniture. This ensures precision Work well in blind spots using pliers or a wrench. We welcome posts about "new tool day", estate sale/car boot sale finds, "what is this" tool, advice about the best tool for a job, homemade tools, 3D printed accessories, toolbox/shop tours. Wood screws strengthen a joint with great clamping force. Jan 26, 2022 · Nonetheless, a flat head screw or pan head screw are most popular with MDF. Jan 29, 2024 · Essential Screwdriver Types: For most DIY tasks, a basic flat head or Phillips head screwdriver is sufficient. Also known as flathead screws as the one slot is used by a flat screwdriver instead of a Philips screwdriver. #8 or #10 gauge screws are ok for MDF though it depends on the thickness of the boards at hand. Choose a head type that aligns 2. Moreover, their design allows for easy access and straightforward use. Cam-out refers to the slipping of the bit in the screw head as the screw is driven. Using a pilot hole Jul 25, 2018 · VGBUY M8-1. Screw Length: 1 in. Jul 13, 2023 · 1. Aug 22, 2023 · Slot screw heads have a single horizontal indentation referred to as the slot with a flat bottom, which is ideal for low-torque, low-speed applications. I. Nov 5, 2023 · Screws are fasteners that consist of a drive, head, shank, thread, and tip. What are the shipping options for Hex Flat Head Screws? All Hex Flat Head Screws can be shipped to you at upvotes ·comments. If the plank needs to be removed 20, 30, 50 years later, a bad grove can Mar 8, 2023 · Flat head screws are a great choice for many applications in the building industry because they sit flush with the surface. Oct 3, 2016 · In the early 1900s, different types of screw heads came about. Oct 4, 2019 · In the early 1930s, the Phillips head screw was invented by Oregon businessman Henry Phillips (1889–1958). You’ll also need to countersink these screws to accommodate the angle. The use of metal screws as fasteners began in Europe in the 15th century. It offered a big advantage over the slotted screw head because it was self-centering and Jun 8, 2005 · William Sellers was the person who got what became known as the USS (united States Standard) thread forms adopted in 1864. Heads on these nails were hand-formed as a "T" or as a rose-faceted head. Sep 9, 2010 · Furniture predating 1790 will include “rose-head” nails identified by their irregular, rose-shaped heads. [5] A Chinese study published in 2019 which compared different types of screws used in medium density fiberboards (MDF) for furniture purposes found that the most important factor for how Jan 22, 2024 · A stainless steel flat head screw is a type of fastener featuring a low-profile, countersunk head designed to sit flush with the material it secures. Qty 100 to 1000 - Antique Copper Steel Wood Screws | 4 X 1/2 Inch | Pan Head | Phillips Drive | Wood Screws | Antique Hardware. Also known as a hexagon bolt or machine bolt, a cap screw is a type of hex head screw designed for use in heavy-duty applications where high clamping force is necessary. These screws were widely used in construction and manufacturing. However, for more intricate projects involving furniture, electronics, or appliances, familiarize yourself with specialized screwdrivers like Torx, hex (Allen wrench), and square head to tackle uniquely shaped screws efficiently. A massive selection to suit every type application. Progress slowly: Be patient to avoid further damage. When used, the head of the screw protrudes above the surface. Includes 1, 10 inch flat head wood screw. Aug 5, 2015 · Furniture Specific: Old screws / useful clues. Flat Head Screw Assortments. The Robertson screw, which features a square head, was invented in 1908 and was favored for its non-slip qualities during installation. So be patient and check them out before you make a purchase…. 8 x 14 mm Phillips Flat Head Stainless Steel Machine Screw . This sub is for tool enthusiasts worldwide to talk about tools, professionals and hobbyists alike. <BR><BR Mar 26, 2023 · There are two types of crosshead screws: Phillips and posidrive. Aug 2, 2019 · Socket cap screws are fully threaded fasteners with a uniform diameter the entire length of the shaft. State of Florida FL 41741. 6 in stock Aisle 13, Bay 017. Commonly used in furniture as a blind nut, they are also used in rail channels to prevent turning of rail when pressure is applied. C. The higher the gauge number (such as 6, 8 or 10), the thinner and smaller diameter of the screw. Choose from our selection of flat head socket screws in a wide range of styles and sizes. In 1744, the flat-bladed bit for the carpenter’s brace was invented, the precursor to the first simple screwdriver. The fastener head is driven by a flat-bladed (flat-head) screwdriver. Machine screws are fully threaded for maximum grip strength. The Phillips head screw was invented by Oregon businessman Henry Phillips in the early 1930s. They provide a secure fit due to the broader surface under the head and are best for sheet metal or other material that require a large diameter head. Package Quantity: 6. Made from zinc plated steel for durability. July 25, 2023. 1 min read. 5- Screwhead Drive Types. Additionally, use screws with a flat or countersunk head to create a flush finish. Furniture Fasteners. Can be a quick gauge to measure the position of the nut. Price Per Pkt $181. Match the drill bit size to the screw’s shaft diameter. Gauge. ”. I took my longer to remove the four flat heads than it did to drill pilot holes and put in the new philips head screws for the new blinds. Shop This Offer. A flat head screwdriver is an essential hand tool for tightening and loosening screws with a flat, single slot head. Commonly used to join 2-pieces of wood tightly together or to attach hinges, locks or other hardware to wood. 2- Non-Countersunk Screw Heads. Then, use a flat-head screwdriver to turn it out. Most screws have an angle of 82 degrees, which is the standard for many countersink bits. May 22, 2020 · You only need a soft-head mallet and a cross-head screwdriver. Common options in today’s market include flat-head, round-head, slot-head and pan-head screws. The Phillips head screwdriver has a cross-shaped tip that fits snugly into the head of the screw and prevents slipping. Did you know that the head of Phillips screws is designed to cam out whenever excessive force is applied? Jun 28, 2023 · Different head types have different torque requirements and driving mechanisms. Our range consist of 4 Prong Tee Nuts, Flange, No Flange and Countersunk Head Timber Insert Nuts, Slotted Cross Dowel Nuts, JCB Connector Bolts and Chipboard Screws. Creating a solid joint with a cam lock nut and screw/bolt requires little physical effort. Oct 2, 2019 · Use with a nut and washer of the same finish. 25 x 12 mm 60Pcs Flat Head Hex Socket Cap Screws Bolts,304 Stainless Steel 18-8,Full Thread,Hex Spanner Included (VG30120) 4. May 6, 2024 · A flat head screwdriver is a hand tool specifically designed for driving screws with a straight, slotted head. If the hole is square, the furniture was possibly made before 1800. Rectangular holes may indicate that the piece was built from 1800 to the 1880s. 2. 1900 in). Square-head nails were made from the late For example, if you are fastening two pieces of 1-inch thick wood together, a 2. 4. . Introduced in 2007, HeadLOK was the industries first flat headed structural fastener to meet code, and has since been trusted by countless PROs and DIYers in all types of applications. 1790-1810, most nails were made entirely by hand at the forge. It is named after its inventor, Henry F. Common project applications: remodeling, fencing, storage, cabinets, framing. These are used in the construction industry for many projects including cabinets, countertops, stairs, furniture, and more. But remember, the wider the screws, the higher the chances of cracking. They needed screws that could take greater torque and could provide tighter fastenings. Heads are one-third smaller than those of other drywall screws. The Phillips screw was invented in the 1930s by Henry F. They are ideal for machinery, engine May 28, 2014 · A: The primary advantage to square-drive screws is they are much less prone to “cam-out. r/Tools. Sharp point starts fast with no predrilling. These included hex heads, but as to when they were actually used in the U. The "circular saw" invented in the 18th century, did not come into wide usage until after 1830. This is the case for screws holding the planks on a wooden boat (may instead be rivets, it there is access on both sides). Robertson, a Canadian, in 1908. 39. 64 products. The Phillips head screw was compatible with the automated screwdrivers used in an assembly line. Add $100 more to qualify. Summary Close. Flat Head Screws 1. May 18, 2018 · Hover Image to Zoom. Jan 12, 2023 · Wood screws are probably the type of screw that most people know. Available in a variety of sizes and types for every application. In woodworking and construction, a nail is a small object made of metal (or wood, called a tree nail or "trunnel") which is used as a fastener, as a peg to hang something, or sometimes as a decoration. Screws were occasionally used in furniture pre-dating the beginning of the machine era (Circa 1830). Box of 200 Nettlefolds 3/4" x 4 Steel Round Wood Screws, Phillips Screw Head (W8020). It was developed as an improvement to the slotted screw, which had been used since the late 19th century. I made a repair to an engineered wood I-joist and used two products side-by-side; FastenMaster’s VersaLOK 6” Torx Flat Head Wood Screw and LedgerLOK 5” Structural Ledger Board Screws. In stock and ready to ship. Slashes reduce splitting. 105" thick. A hole is predrilled at an angle, usually 15°, and the screw is driven through both pieces. I did find a source that said hex heads were used to hold armor together as early as the 15th century. The patent for the Phillips screw expired in 1966. They are common in numerous industries and provide a versatile tool that can be modified to fit any slot. 42. $41. Feb 10, 2024 · Choose the right tool: Grab a manual screw extractor. Types of Screw Heads. Package Quantity: 4. dummy. They come in different sizes, so they can fit together well and be easily controlled. Bolt and Nut Australia carry the largest range of all types of furniture fasteners. It is characterized by its simple and efficient construction, featuring a flat, single-bladed tip that corresponds to the straight slot of a flat head screw. The internal slots or drives on hex screws' heads set them apart from other kinds of mechanical fasteners. The screw head was well-formed (see picture). They had either a flat or pointed tip and were commonly used in machinery and mechanical components. 4- Tamper-Resistant Screws. May 4, 2021 · Was the screwdriver invented before the screw? They needed screws that could take greater torque and could provide tighter fastenings. When did they stop using flat head screws . These square-drive screws have a drill point that powers through drywall and into metal studs up to 0. Early 19th century - Until about 1846, screws were made partially by machine. Oct 28, 2018 · This two-pack of “Everbilt” brand 2 inch #14 phillips flat head screws is a good way to get the small quantity of the screws you need for your woodworking project. knobs are an 1820s invention and were first used extensively in Empire furniture. Hex Flat Head Plain Socket Cap Screw (2-Pack). If the plywood is thicker, choose 2- or 2 1/2-inch screws. Today, screws are an essential part of joining things together. When were the first bolts made and what were they used for? Nord-Lock Group traces the history of the bolt, from ancient Egypt through to modern day bolts & screws. 1380 in to #10/0. Includes 6 wood screws to complete your project. These handy tools are supremely versatile, as you can use them in carpentry, metalworking, roof and insulation installation, sheet metal fastening, furniture assembly and much more: Furniture: You’ll often see flat head screws used in cabinetry Choose from our selection of furniture fasteners, including binding barrels and screws, dowel nuts, and more. Can Hex Flat Head Screws be returned? Yes, Hex Flat Head Screws can be returned within our 90-Day return period. Phillips, who invented it in the 1930s. The Phillips screw is also less likely to strip the head, making it a more reliable screw. Raised Heads (Oval Head) Raised heads, sometimes known as oval-shaped heads, have an angle much like flat screws but have more of a dome-shaped head. The screw in the center is machine-made around 1830. Whether it is a classic flat-head design suitable for wood or the metal specialised versions for plastics and composite materials, each type serves a specific purpose. Our self-drilling flat head screws are one of our most popular products for a good reason. This is a significant advantage over other screws, which can be difficult to align properly. 7-8X2 WoodFerret™ Square Drive Flat Head Screw. Flathead screwdrivers are sometimes called slotted heads due to how the tip slots into the screw head. 99 So are Phillips head screws. Flat head screws are angled under the head to fit flush within countersunk holes. 5-inch long screw would be suitable. The screw was used in furniture but did not become a common woodworking fastener until efficient machine tools were developed near the end of the 18th century. [1] Generally, nails have a sharp point on one end and a flattened head on the other, but headless nails are available. A countersunk screw head is where the head is sunk into your workpiece or project. Oct 13, 2023 · Flathead screwdrivers are some of the most popular screwdriver types, as most screw heads come in that style. This means the head becomes flush to the surface and is not exposed. So if you find a furniture item using screws that have Nails have been in use since the beginning of the Bronze Age, ca. Choose from our selection of flat head socket cap screws, including over 3,100 products in a wide range of styles and sizes. Jacob Perkins, inventor of a water-powered nail-cutting machine, began producing machine-made cut nails in 1794 and in 1795 received the first U. This design allows the screwdriver to engage securely with the screw Aug 17, 2005 · Hillman HOMEPAK 42172 Flat Head Square Drive Wood Screws 6 inches. We also distribute Selby hardware products designed specifically for There's a little more to it than that as well. Two views of three screws: The one on the left was handmade in the late 18th century. Slotted Head Screw. Most of the time, brass, steel, or bronze are used to make a wood screw. Make a 9/64 in. Choose from our selection of flat head drilling screws in a wide range of styles and sizes. They differ from each other in that the Phillips screw head has four cross points and the posidrive screw head has a star with eight points. Wood Screws - 15PCS Flat Head Phillips Screws, 304 Stainless Steel Screw (#14 x 3") dummy. Screw Length: 1-1/2 in. Nov 27, 2023 · For thinner plywood, opt for 1 1/4- or 1 1/2-inch screws. Cap screws have a smooth shank without threading, while their threaded portion is longer than that of other screw types. Choose from our selection of standard flat head screws, including Phillips flat head screws, hex drive flat head screws, and more. Slotted screws, along with Philips are among the most commonly used screws. 3/4 in. Each size has its unique specifications. The average price for Flat Head Stainless Steel Machine Screws ranges from $10 to $150. #10-32 x 5/8 in. This screw head is more comprehensive and has a rounded surface on the top. ” Though Wikipedia tersely informs me that “flathead” is a stupid name for the bit because the flathead doesn’t have a flat head, at all—the screw does. 1800 B. Disassembling furniture isn’t difficult. The most common types are flat and oval screw heads. A variety of sizes are available for flat head screws, each designed for specific uses, and their lengths can differ significantly from a few millimeters to several centimeters. Ensure that the screws have a sharp point to easily penetrate the wood. Flat heads are countersunk into wood for a flush installation. JEGONFRI 250pcs #6 × 1 inch High Hardness Drywall Screws, Black, Coarse Thread, Phillips Drive, Bugle Head, Black Wood Screws, Wood and More (1 in, 250) Try again! May 1, 2014 · Trim head: These are like the flat head but with a smaller diameter flat surface. If the screw won’t catch, cut a notch using a rotary tool. What's the best-rated product in Flat Head Stainless Steel Machine Screws? The best-rated product in Flat Head Stainless Steel Machine Screws is the M5-0. Crafted from corrosion-resistant stainless steel, these screws come in various sizes and configurations to suit diverse needs. The best-rated product in Hex Flat Head Screws is the 1/4 in. Unlike slot screws, they were self-centering, meaning that the user did not need to simultaneously center the screw in its hole Feb 5, 2005 · Yet they are held in by multiple flat head screws. 5. Pocket holes are a relatively new innovation in woodworking as a method for joining pieces of wood together. Countersunk screw heads come in a variety of shapes. nail-cutting machine patent. Flat Undercut Screw. Fine Furniture Leola Fasteners has a full line of screws and fasteners for bedroom, kitchen, dining, and living room furniture. -20 x 1-1/2 in. Feb 26, 2024 · Angle: Align the bit at the desired angle matching your screw’s conical angle. Round nail holes point to more recently built furniture. Jan 27, 2023 · Types of countersunk screw heads include: Flat Head- Flat head screws install completely flush with the material’s surface. The Model T car used over 700 Robinson screws! In 1930, the Phillips head screw was invented, which was ideal for the now-popular car assembly line. Hex-head screws, also known as hex bolts, are bolt fasteners with a six-sided hexagon head and an externally threaded body. Check out our decorative head machine screws selection for the very best in unique or custom, handmade pieces from our wall decor shops. The tip of a flat head screwdriver is flat, so they fit into linear-ledged screw heads. 5 mm and 5 mm (#6/0. Common and cheap, these basic fasteners are not really the best to use in most situations. Sep 27, 2023 · Wood screws are designed with aggressive threads to securely grip wood. Truss Screw Heads. A nail cutting machine designed in the 1790s cut the nail's shank and reduced hand labor to only forming the head of the nail. Unlike a flat screw, the head of a raised screw will come out of the surface slightly. #10 x 1-1/4 in. Anchors. See full list on remodelormove. In the imperial system, typical sizes are#4,#6,#8, #10, and #12, while in the metric system, they vary from M2 to M6. Using regular deck screws may not provide the same level of security and tight fit that the Kreg screws do. Following instructions to remove a stripped hex screw can be difficult if you don't have the right tools. S. So if you find a furniture item using screws that have completely rounded shafts, pointed ends, and perfectly finished heads with matching cuts (much like a screw you would purchase today), the piece likely dates to the mid-19th century or later. You merely slide or hammer the nut into a pre-drilled hole, insert the screw/bolt and then turn the nut using a screwdriver. com Nov 28, 2019 · Screws were not made completely by machine until 1848. Automobile manufacturers began using car assembly lines around this time Mar 9, 2023 · The Phillips screw is named after Henry Phillips, who designed the screw in 1933. Set the drill bit to the correct depth using a depth stop. Square-Drive Small-Head Drilling Screwsfor Joining Drywall to Metal Framing. It has sharp, even threads, a cylindrical shape, blunt end and the It’s gone by many names over the years: the standard, the common blade, the flat-blade, the slot-head, the straight, the flat-tip, and, of course, the “flat-head. The earliest record of lathe made wood screws dates to an English patent of 1760. Phillips, however, basically align themselves, and if the tool is too worn, who cares, it'll just mash them in and screw the head of the screw up, but it'll still get the job done. In 1933, Henry Phillips purchased the rights to a socket screw and redesigned it with a cruciform recess, creating the crosshead Phillips screw. View More Details. This makes them ideal for cabinets, countertops, stairs, furniture, drywall and other components. Wood screws are common in furniture in general, and for furniture uses they typically have diameters between 3. Oval head: These screws also have a countersink design, but the surface is slightly elliptical in shape. Mark the Spot: Clearly mark where the screw will go using a pencil or marking tool. (6k) $7. Free UK Postage. Note the flat spot on the shaft, the irregular threads, blunt tip and the off-center slot. This makes them ideal for aesthetics-driven projects where you don’t want screw heads to protrude. Dec 8, 2022 · It can be challenging to remove stripped, old, and worn-out hex screws from metal or wood. The Phillips screw was developed to be more resistant to cam out, the propensity of a screwdriver to slip out of the slot and damage the head of the Jul 26, 2023 · The History of Phillips Screws. Secure structural joints in concrete, brick, and other building materials. $ 1 38. One advantage is if the item will set hard use, and the head of the screw damaged, a flathead screw can be recut in place if it needs to be removed. Automobile manufacturers now used car assembly lines. – Set Screws: Set screws were used to secure one object to another without the need for a traditional head. Mar 22, 2023 · The Phillips screw was invented by Henry Phillips in 1935. Furthermore, choosing the correct gauge is crucial for achieving strong connections. Large flat head maximizes pull-through holding power and finishes flush with work area. Aug 24, 2021 · Countersunk screw head. Certified IRC / IBC code-compliant. In this manner, when were screws first used in furniture?Screws were not made completely by machine until 1848. They are primarily used to fasten metal parts together. Feb 28, 2024 · Flat head screws with an 82-degree angle are standard countersunk screws designed to sit flush or below the surface of the material they are inserted into. South Loop Store. The answer to this question is yes, regular deck screws can be used with the Kreg Jig. They are also used as a perfect foundation in metal channels for hidden fasteners. use as a building material and furniture manufacture. Oct 14, 2020 · In handmade screws, you will notice variation in size and shape of screws used in a piece of furniture. Specifically designed for woodworking applications. We would like to show you a description here but the site won’t allow us. 65 (157. I did not see. But it wasn’t always this way. Mar 28, 2014 · They explain that since nails in antique furniture often fall out, the piece may have empty nail holes left in it. pilot hole prior to installing the wood screw. Robertson screws tend to need the driver to be in good condition and basically perfectly aligned to screw in right. Coarse threads and a sharp point make wood screws easy to install. The use of the correct size screwdriver, along with proper grip and technique, ensures effective and safe results. Lauren Cabral. Countersink bits can be found with different angles, typically ranging from 82 to 90 degrees, to match the screw head angle. Matching Screwheads to Materials and Projects. T-30 and T-40 star drive reduces cam outs and excessive wear on bit. They were made individually by blacksmiths. 8 in stock Aisle 13, Bay 005. 1794 - Perkins Nail Cutting Machine. The square-head screw was invented by P. The screw threads were evenly spaced, and the screw tip was a sharp point so it will dig into the wood very well (see picture). $ 2 33. . 96 exc GST) Add To Cart. Choose from our selection of hex drive flat head screws, Phillips flat head screws, and more. Phillips’ design was an improvement on the existing slotted screwdriver, which tended to slip out of the head of the screw. When did they stop using flat head screws. 1. Phillips, an American businessman. Blacksmith forged examples can be identified by inspecting for thin and slightly off-centered slots and off-round heads. May 2, 2021 · 9. Satin Brass Phillips Flat-Head Screw with Oversize Threads for Loose Entry Door Hinges (18-Pack) Tighten loose entry door hinges easily with Fringe Screw, the direct replacement for stripped door hinge screws. Application. The screws will not be uniform with heads off center and slots off center on the heads. Mar 29, 2024 · While there are different types of countersunk head screws, you can leverage the full potential of these screws if you choose the right screw and use them correctly. 9 out of 5 stars 42 1 offer from $9. These are classified as simple machines, which means that they are mechanical devices that change the magnitude or direction of a force. The screw’s shank, or body, features threads that bite into the Select the Right Tools: Begin by choosing a countersink bit that matches the size and type of screw you are using. Flat head Philips drive. Hover Image to Zoom. Mar 12, 2023 · The phillips head screwdriver is used to drive Phillips head screws, which have a cross-shaped head. They have a smooth shank and tapered point, making them perfect for going through wood. If the hole is positioned correctly, this can be a very discrete method of joinery. A flat head screw sits flush with the surface it’s drilled into, offering a clean, low-profile finish. From that time to the beginning of the 19th century, ca. Phillips. Oval Head- Oval head screws are a combination of a countersunk head and a domed head. Pan head: A dome-shaped head that stays above the wood’s surface while the flat surface under the head is the bearing surface. They had sharp, self-tapping threads and a flat or rounded head. Replaces traditional lag screws and through-bolts. Phillips Flat Head Stainless Steel Machine Screw (3-Pack) Machine screws are fully threaded fasteners with a uniform diameter the entire length of the shaft. Mar 19, 2023 · A Phillips screwdriver is a screwdriver with a tip that is designed to fit into the two intersecting slots of a Phillips screw. 1 in. • The use of metal screws as fasteners began in Europe in the 15th century. Screws are commonly used to join materials and keep items in place. This design allows for a smooth, flat surface after installation, making these screws ideal for use in applications where a sleek, clean finish is desired. You may need to go some gauges up for a very thick board. We will look at these types below. 1- Countersunk Screw Heads. The Phillips screw has a cruciform recess, which allows it to be self-centering. A mechanical wrench Flat head screws are angled under the head to fit flush within countersunk holes. Choosing the Right Screwheads. However, it is important to note that the Kreg Jig is designed to work with its own screws, which are self-tapping and have a flat-bottomed head that sits flush in the pocket hole. Hex Head and Square Drive Screws, Woodwhit Studs, Bolts, Nuts, Headboard Bolts & Upholstery Clout Nails, for all your furniture and upholstery needs! if we haven't got it we can source it for you! Serving Trade, Bulk Wholesale, and Small Quantities for DIY Upholstery Hobbyist. Socket cap screws are designed with a deep May 13, 2019 · Learn how to countersink screws to give your projects a professional look! This easy technique allows you to hide screw heads in wood. (Whatever, Wikipedia. Polished 14g wire. They were invented in 1938 for the automobile industry. Apply pressure: Turn the extractor counter-clockwise. Get free shipping on qualified Flat Head, Phillips Screws products or Buy Online Pick Up in Store today in the Hardware Department. Screws for use in pocket holes. We have the drawer slides, lid supports, hinges, and other hardware needed by the industry. It is a modification of the Thompson design, customized for production lines where screw guns were becoming increasingly common. Align the tool: Place it into the stripped head. Flat-head screws are most suitable with a soft wood surface, while round-head and pan-head screws are more suited for heavy furniture. Mar 16, 2023 · The Phillips head screwdriver gets its name from Henry F. 3- Combination Type Screw Heads. To be fair, I really only needed the product to drive through one 1-3/4” lvl, 5 layers of 1/2” osb, and grab 3/4” Advantech subfloor on the opposite Mar 3, 2024 · Cap Screw. um zm as tz qa qb nu yb py ox