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Wood Screws - Flat Head, Oval Head, and Other Wood Screws A tapered shank screw for use exclusively in wood. Available in a variety of head styles and materials. Wood screws have a smooth shank that allows the screw to pull the two pieces of wood together for a tight joint. Wood screws also taper along the threaded portion optimizing the screws holding power in wood. This is why some people use special tapered drill bits for pilot holes. Phillips flat head wood screws Flat head screws are countersunk into the material for a smooth surface area. Slotted flat head wood screws Flat head screws are countersunk into the material for a smooth surface area. Slotted oval head wood screws Oval head screws are similar to flat head, but have a slightly rounded top for a more finished look. Slotted round head wood screws Round head protrudes above the surface of the material to be fastened. Phillips round head wood screws Round head protrudes above the surface of the material to be fastened. Brass An alloy of copper with good corrosion resistance. Once common for marine use, it has been replaced by stainless steel. Used mostly in decorative applications. Zinc plated steel Steel is zinc plated for moderate protection against rust. Stainless steel 18-8 Stainless steel 18-8 is an alloy of steel with high corrosion resistance. Stainless has become the material of choice for exterior and most marine applications. Silicon bronze Bronze is an alloy of copper with greater strength and corrosion resistance than brass. Most commonly used in wood boat building and restoration. Sheet metal screws Highly versatile, used in wood, fiberglass and metal, also called self-tapping screws. Phillips pan head A pan head screw protrudes above the surface of the material to be fastened. Slotted pan head A pan head screw protrudes above the surface of the material to be fastened. Square drive pan head A pan head screw protrudes above the surface of the material to be fastened. Phillips flat head Flat head screws are countersunk into the material for a smooth surface area. Slotted flat head Flat head screws are countersunk into the material for a smooth surface area. Square drive flat head Flat head screws are countersunk into the material for a smooth surface area. Phillips oval head Oval head screws are similar to flat head, but have a slightly rounded top for a more finished look. Slotted oval head Oval head screws are similar to flat head, but have a slightly rounded top for a more finished look. Phillips truss head Truss heads protrude above the surface to be fastened, with a low profile and a large surface area under the head. Phillips pan head self drilling Sheet metal screw with a drill point and a Phillips pan head. Phillips flat head self drilling Sheet metal screw with a drill point and a Phillips flat head. Hex washer head Sheet metal screw with a hex head and a washer attached. Hex washer head self drilling Sheet metal screw with a hex washer head and a drill point. Hex washer hd self drilling w/bonded sealing washer Sheet metal screw with a hex washer head, a drill point, and a bonded neoprene washer. Carriage & Timber bolts A bolt mostly used in wood with a domed top and a square under the head. This pulls into the wood as the nut is tightened. Carriage bolts A bolt mostly used in wood with a domed top and a square under the head. This pulls into the wood as the nut is tightened. Timber bolts These bolts have a very large slightly domed head with four 'fins' that prevent the bolt from turning as the nut is installed. Wing Nuts, Hex Nuts, Cap Nuts and Other Nuts Nuts are used to attach machine thread fasteners. Different types of nuts include Wing nuts, Hex nuts, Cap nuts, T-Nuts and other varieties of nuts in various sizes and materials. Hex machine screw Hex nuts nuts Used for fastening to a bolt This type refers to nuts used with smaller when mechanically joining machine screw sizes under 1/4. materials together. Hex lock nuts nylon Hex jam nuts insert A thinner version of a hex nut The bolt threads into the nylon material in sizes 1/4 and up. located at the top of the nut. This helps prevent loosening from vibration. Hex jam nylon lock Heavy hex nuts nuts A heavier pattern version of a standard hex nut. A thin pattern lock nut. Wing nuts Cap nuts A nut that can be turned by A nut with a finished top. Bolts hand. must be in the proper length. Acorn nuts Square nuts Acorn nuts are a high crown Square nuts, once very type of cap nut used for common, were mostly replaced appearance.. by hex nuts. K-Lock nuts Flange nut serrated A nut with an attached free- A nut with a built in washer spinning external tooth which is serrated to resist lockwasher. Speeds installation. vibration. Prevailing torque T-Nuts lock nuts A type of nut used to fasten to wood, particle or composite All metal lock nuts are non-reverseable and materials. often used high temperature applications. Coupling nuts Slotted nuts Coupling nuts are long nuts Slotted nuts are used in used to connect... conjunction with a cotter pin... Two-way reversible Castle nuts lock nuts Castle nuts are used in These lock nuts can be installed either side up. conjunction with a cotter pin... All metal lock nuts are often used high temperature applications. Washers Washers provide a greater bearing surface under the fastener. This helps prevent a nut, bolt or screw from pulling through the material. Flat washers Used under the head of a bolt or nut to distribute the forces applied when tightening. USS flat washers Used under the head of a bolt or nut to distribute the forces applied when tightening. USS pattern is the most common type of flat washer. SAE flat washers Used under the head of a bolt or nut to distribute the forces applied when tightening. SAE pattern is a tighter fit on the bolt and a smaller outside diameter. Fender washers Used under the head of a bolt or nut to distribute the forces applied when tightening. Fender washers have a large outside diameter. Lock washers Lock washers place tension against a nut after tightening, to help prevent the nut from loosening. High collar lock washers High Collar lock washers are designed to fit under the head of a socket cap screw. Lock washers external tooth Uses external teeth for locking and tension. Lock washers internal tooth Uses internal teeth for locking and tension. Less aggressive than external tooth with a smaller outside diameter. Finishing washers Made for flat or oval head screws for a finished look. Dock washers Used to distribute the forces applied when tightening. Dock washers have a larger outside diameter than standard and are thicker than standard. Square dock washers Used to distribute the forces applied when tightening. Square dock washers have a large square outside and are thicker than standard washers. Ogee washers Ogee washers are thick, large diameter, cast iron washers. They have a curved or sculpted appearance and are typically used in dock and wood construction to prevent bolt heads and nuts from pulling into the wood. Anchoring products Anchors are used for fastening in concrete, plasterboard, and other materials. Stud anchors (w/ nuts and washers) Stud anchors (also referred to as wedge anchors) are one piece expansion bolts with universal style collars for heavy duty fastening into stone or solid concrete. Stud anchors come with nuts and washers. Sleeve anchors hex head A heavy duty anchor for use in brick, stone, concrete or block. Does not require a solid base material for installation. Sleeve anchors slotted flat head A heavy duty anchor for use in brick, stone, concrete or block. Does not require a solid base material for installation. Lag shields A medium duty zinc alloy anchor for use in concrete, brick or a mortar joint. Used with a lag bolt. Machine screw anchors A two-piece machine thread anchor for use in stone, brick, concrete. Ideal for shallow holes. Must be installed threaded end towards the hole and fastened in place with a setting tool (sold separately). Drop-in anchors A heavy duty machine thread anchor for concrete or stone. The anchor uses an internal cone to expand in the hole and requires a setting tool (sold separately). Ideal for overhead applications. Install crimped end towards hole. Double expansion sleeve A zinc alloy anchor with two-way expansion that ensures contact along the length of the hole. Use in concrete, block, stone and brick. The anchor is set by tightening the machine screw or bolt. Install anchor threaded end towards the hole. Concrete screws phillips flat head Used in concrete, brick or block. A quick and easy way to fasten in light to medium duty applications. A pilot hole is required and a hammer drill is recommended for ease of installation. . Concrete screws hex head Used in concrete, brick or block. A quick and easy way to fasten in light to medium duty applications. A pilot hole is required and a hammer drill is recommended for ease of installation. Large diameter concrete screws hex head Used in concrete. A quick and easy way to fasten in light to medium duty applications. A pilot hole is required and a hammer drill is recommended for ease of installation. Spring toggle wings A spring loaded anchor that folds for installation through a pre-drilled hole. Use with machine screws. Once through the hole, the wing re-opens. Place screw through object to be mounted first. The wing will fall if screw is removed. Plastic toggle anchors This anchor is designed to open behind drywall or hollow doors for a secure hold. Drill 5/16 for all sizes. It can also be used in solid materials. Conical anchors This light duty plastic anchor is used with sheet metal screws in block, brick, concrete and drywall. Each size can use a range of 2 screw diameters. Ribbed anchors This light duty plastic anchor uses sheet metal screws and is best in drywall and plaster. The ribbed design helps prevent spinning and the anchor is designed to expand and hold to a greater degree than a standard conical anchor. Each size can use a range of 2 screw diameters. Woodscrew anchors This anchor is made of lead and can be used with woodscrews or sheet metal screws. Each size can use a range of 2 screw diameters. Hollow wall anchors Often referred to as a 'Molly Bolt', hollow wall anchors are used for light duty anchoring in drywall or other hollow walls. The screw can be removed and re-inserted but the anchor itself can not be removed. Hollow wall drive anchors These hollow wall anchors have a metal tip that allows them to be installed in drywall with a hammer rather than drilling a hole. Nail drive anchors These anchors when driven in expand inside the hole for a secure grip. Drill hole the same size as the anchor. Non-removable. Anchor bolts (w/ nuts and washers) Used for anchoring in new concrete. Sex bolts and Mating screws Sex bolts (also known as barrel nuts and Chicago bolts) have a female thread and are used for through bolting applications where a head is desired on both sides of the joint. Choose your head style, and material. Sex bolts - Combination truss head These sex bolts have a low profile head that takes either a Phillips or slotted screwdriver. Sex bolts - Phillips truss head serrated These sex bolts have a low profile head with a Phillips drive. The underside of the head is serrated to resist loosening from vibration. Sex bolts - One way truss head serrated These sex bolts have a low profile head with a one way drive. They are installed with a slotted screwdriver and are not intended to be removable. The underside of the head is serrated to resist loosening from vibration. Mating screws - Combination truss head Mating screws have a shoulder that matches the diameter of the sex bolts they are used with. These mating screws have a low profile head that takes either a Phillips or slotted screwdriver. Mating screws - One way truss head serrated Mating screws have a shoulder that matches the diameter of the sex bolts they are used with. These mating screws have a low profile head with a one way drive. They are installed with a slotted screwdriver and are not intended to be removable. The underside of the head is serrated to resist loosening from vibration. Common Fastener Related Terminology Term Definition Also referred to as a cap nut. This type of nut has a domed top Acorn Nut that covers the end of the bolt. Used in reference to countersunk fasteners. This is the angle Angle of Head from one side of the cone to the other. Standard measurement is 82 degrees. Special 100 degree heads are also made. Backing Off Loosening of a nut over time by spinning back up the thread. The area of a fastener that caries a load. Washers are Bearing Surface commonly used to increase the bearing surface. The smooth part of the bolt above the threads. Also called the Body shank. The diameter of the body or smooth part of the bolt above the Body Diameter threads. Also shank diameter or major diameter. A special tap for finishing the threads to the very bottom of a Bottom Tap hole that does not pass through the material. A regular tap must be used first. Also referred to as an acorn nut. This type of nut has a domed Cap Nut top that covers the end of the bolt. A term used to describe a machine bolt or machine screw. Cap Screw Usually preceded by a head style as in 'Hex cap screw'. A bolt with a smooth rounded head and a small square section Carriage Bolt under the head to prevent spinning during assembly. Used in wood. A hex nut with a slightly reduced slotted cylindrical section on Castle Nut one end. Used with a cotter pin and drilled fastener to prevent loosening. Used in metric, class is a material designation equivalent to the Class US term Grade (ex. Class 10.9). Also in US fasteners, a specification describing how tightly the fastener fits. A pin with a head on one end and one or more drilled holes for Clevis Pin a cotter pin. A fastener with a full cone shaped point on the end. Often used Cone Point in automated assembly to guide the fastener into the hole. A folded pin with a loop at one end designed to have the other Cotter Pin end bent to hold it in place. A fastener head that sits at or below the surface of the Countersunk material such as a flat or oval head. A cone shaped end with a circular depression in the center. The Cup Point contact area is thus a circular ridge. This is the most common point for set screws. Threads formed by cutting into a piece of stock. See also Roll Cut Thread Thread. Die A tool for cutting external threads into a rod. An abbreviation for Deutsches Institut fr Normung, the German standards body. In reference to fasteners DIN DIN indicates fasteners that conform to a specific metric standard (will be followed by the standard number). An unthreaded cylindrical tip that is smaller than the fastener Dog / Dog Point diameter. Used to help speed alignment during assembly. Also called a Pilot Point A double ended screw with wood threads and points on both Dowel Screw ends. Drilled Head A fastener head with a hole drilled through it for a safety wire. A fastener shank with a hole drilled through it for a pin or Drilled Shank safety wire. A bolt with a large flat disk on the top and a square section Elevator Bolt underneath, resulting in a flush finish. A measurement of how much of the fastener is in the material Engagement being fastened. See Length of Engagement and Thread Engagement External thread Thread on the outside of a cylindrical piece of stock. A bolt with a circular ring on the head end. Used for attaching Eye Bolt rope or chain. Similar to a pan head but with a smaller head diameter and a Fillister Head taller head, with higher vertical sides. A washer designed for use with countersunk screws. Used to Finishing Washer enhance appearance in some applications. Flange Bolt A bolt with a built in washer-like flange just below the head. A flat head with a conical bearing surface. Designed to be Flat Head Countersunk. A type of lock nut where the top of the nut has been slotted Flex Lock and bent inward. When assembled the pressure on the threads prevents the nut from backing off. A double ended bolt with machine threads on one end (takes a Hanger Bolt nut) and wood threads on the other end. A fastener that has been heat treated to increase strength. Hardened Grade 5, Grade 8 and alloy steel bolts are hardened. The type of head or top that is on the fastener. Such as a Head Style Round head or Hex head. A system for re-threading stripped internal threads. A proprietary tap is used to re-thread the hole and a spring like Heli-Coil insert is placed inside to make up the difference in width, allowing the original size bolt to be used. Hex Bolt A bolt with a six sided head. Hex Head A head with six vertical sides and a flat bearing surface. Internal Thread Thread on the inside of a cylindrical hole. A thinner pattern of nut, sometimes used as a second nut to Jam Nut 'jam' another nut in place preventing loosening. Knurl A pattern of ridges on the surface to provide grip. Thread that is formed opposite to normal thread so it tightens Left Hand Thread counter clockwise. Used on spinning equipment to prevent loosening. Generally custom made. Length of Engagement The length of the part of the fastener where the threads are engaged (in) the material being fastened. Lock Nut Any nut with a special design to help prevent backing off. The diameter from the top of the thread on one side, to the Major Diameter top of the thread on the other side. Nylock Nut A nut with a nylon insert to help prevent backing off. A fastener designed so it can be installed with a slotted screw One way screw driver but can not be removed. Used to prevent tampering. A countersunk screw with a slightly rounded top surface for a Oval Head more finished look. A head with a slightly rounded top surface and short vertical Pan Head sides. An unthreaded cylindrical tip that is smaller than the fastener Pilot Point diameter. Used to help speed alignment during assembly. Also called a Dog Point. The distance from one thread to the next along the length of Pitch the fastener. Used mostly in metric, where it is expressed in millimeters. A bolt with a smooth flat countersunk head that has a small Plow Bolt square section underneath. Used on plows. Thread that is formed opposite to normal thread so it tightens Reverse Thread counter clockwise. Used on spinning equipment to prevent loosening. Threads formed by tightly pressing or rolling the piece of stock Roll Thread between serrated dies. This is the most common method of creating threaded fasteners today. A machine screw with no head usually used to secure parts on Set Screw a shaft. The smooth part of the bolt above the threads. Also called the Shank body. The diameter of the shank or smooth part of the bolt above Shank Diameter the threads. A nut with slots cut into it for the insertion of a cotter pin. Used Slotted nut with a drilled shank fastener. Similar to a castle nut. Square Bolt A bolt with a four sided head A special tap for starting the creation of internal threads. Must Starter Tap be followed with a regular tap. Stove Bolt Machine screws, generally slotted, packaged with nuts. A double ended bolt or piece of threaded rod. Often used in Stud machine and automotive applications. A thin nut with a flange on one end. Intended to be inserted in T nut a hole, in wood, with the flange on the surface. Used to allow a bolt to be fastened in wood without a protruding nut. The tool used to create internal threads in a hole or the act of Tap creating such threads. See also Bottom Tap, and Starter Tap. Tap Bolt A fully threaded bolt. The maximum load in tension (pulling apart) that a bolt can Tensile Strength withstand before failure. The percentage of the thread height that is in the material being fastened. For full thread engagement the pilot hole Thread Engagement should be equal to or smaller than the Root Diameter of the fastener. A term used to describe the number of threads per inch for a Thread Series given diameter. Threaded Fastener Any fastener with threads such as a screw or bolt. A bolt that has been heat treated all the way through. More Through Hardened brittle but stronger than a Case Hardened bolt. Also called Fully Hardened. An extra wide low profile head with a slightly rounded top Truss Head surface. U Bolt A bolt in the shape of a U, threaded on both ends. A countersunk head that has been cut off at 70% of the normal height. Screws in this style will have a second flat surface Undercut Head parallel to the top just before the threads. Used frequently in extremely short screws to provide more thread. Unified Coarse Thread The standard US thread pattern. (UNC) Unified Fine Thread The standard US thread pattern for fine thread. (UNF) Whitworth / Whitworth A British thread standard that is no longer in use. Thread Wing Nut A nut with 'wings' for easy manual assembly. The maximum load at which a material exhibits a specific Yield Strength permanent deformation. Common Fastener Related Abbreviations Abbreviation Meaning &NT With Nut Precedes a dimensional specification for aircraft fasteners developed by AN the Aeronautical Standards Group. American Society for Testing and Materials. Used preceding a standard ASTM number developed by that group. BR Brass BSF British Standard Fine BSW British Standard Whitworth BT Bolt (on drawings) C National Coarse Thread CL Class (Metric Material/Strength Specification) CR Chrome CSS Counter Sunk Screw (flat or oval head) CT Course Thread An abbreviation for Deutsches Institut fr Normung, the German standards body. In reference to fasteners DIN indicates fasteners that DIN conform to a specific metric standard (will be followed by the standard number). F Fully Threaded FH Flat Head FIL Fillister Head FIN Finishing (Washer) FNDR Fender (Washer) FT Fine Thread, Fully Threaded G Grade Galv. Galvanized Galvi Galvanized GR Grade GV Galvanized HD Head HHMB Hex Head Machine Bolt HVHX Heavy Pattern Hex Bolt HX Hex JMNT Jam Nut LB Lag Bolt, weight in pounds LH Left Hand Thread LW Lock Washer M Metric MB Machine Bolt MS Machine Screw MSNT Machine Screw Nut NC National Coarse Thread NF National Fine Thread NT Nut OH Oval Head OV Oval Head P Philips PH Philips Head Phil. Philips Drive PN Pan Head PT Partial Thread RD Round Head RH Round Head, or Right Hand Thread S Slotted S/S Stainless Steel SAE Pattern (Washers) These washers have a smaller outside diameter SAE than USS pattern washers, Also used to indicate US Fine Thread SBR Silicon Bronze SD Square Drive SEMS A type of pre-made screw and washer assembly SKT Socket SL Slotted Slot. Slotted Drive SMS Sheet Metal Screw SQ Square SS Stainless Steel, Set Screw USS Pattern (washers). These washers have a larger outside diameter USS than SAE pattern washers, Also used to indicate US Course Thread WS Wood Screw Z Zinc yrdBo: http://www.boltdepot.com

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