Fasteners, Hardware

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    Wood Screws

    Wood screws are made to join two pieces of wood together and securely hold them. There are many styles of wood screws available today, from various driver tools to what material the wood screw is made from.

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    Cylindrical Head Socket Cap Screw

    Socket cap screws have a small cylindrical head with tall vertical sides, and with recessed hex-shaped sockets with which to drive them. Because they are driven with hex keys (Allen wrench) or hex socket bits, they are ideal for applications where limited clearance would not allow the use of wrenches and sockets. In addition, the driving surface is protected from external damage and provides six sides of contact surface for added torque.

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    Flat Head Socket Cap Screws

    Socket cap screws are commonly used in machine parts, die fixturing, and clamping. The flat socket head enables driving where there is not sufficient space for wrenches or sockets, and allows the screw head to sit flush with the surface.
    Socket cap screws are available as either an alloy with a blackened oxide finish, or as stainless steel. Also, they feature either coarse (UNC) or fine (UNF) threading.

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    Plow Bolts

    Plow bolts feature a countersunk, flat head, square neck, and unified thread pitch. They are commonly used in road graders, scoop shovels, and other heavy-duty industrial equipment where a flat, smooth surface is required. Grade-5 plow bolts are made from a medium-grade, heat-treated carbon steel, and have a plain finish.

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    Button Head Socket Cap Screw

    The button head version of socket cap screws are commonly used for removable panels, machine parts, die fixturing, and clamping. The socket head enables driving where there is not sufficient space for wrenches or sockets. The button head offers a wider bearing surface and high tensile strength, but offers lower profile than standard socket cap screws.
    Button Head socket cap screws are available as an alloy with black oxide finish, or as stainless steel.

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    Set Screws, Cup Point

    Set Screws are essentially a headless bolt, which has a hex socket in the driving end. They are commonly used when a protruding head would be in the way of other moving parts. Their most common function is to secure two parts together, but without a pre-determined positioning point between them. A prime example is fixing a pulley wheel along a drive shaft, where the set screw in the wheel’s hub is tightened into the side of the drive shaft and holds them tight due strictly to friction.

    Set screws are available either as a black hard steel alloy, or as stainless steel.
    Because of its headless shape, and how it bores through its hole, a set screw is also known as a “grub screw”.

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    Fender Washers
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    Lock Washers
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    F436 Structural Washers (SAE)
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    Wing Nuts

    Wing nuts are a type of specialty nut with a pair of wings to enable it to tighten without tools. The wings provide a grip for the thumb and finger for turning. They are commonly used where frequent adjustments or removals are needed, and can be made quickly at a later stage.
    An alternative form of the wing nut has a washer built in, and is used to storm-proof the windows of a building. This washer face allows the wing nut to be used to secure plywood onto fixed anchors, where the hole in the plywood will be larger than the anchor studs it and the wing nut are being mounted on. This provides the advantage of having a larger surface bearing the pressure, while also eliminating the need of a separate washer that will often fall and get lost during storm-prep installation.

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    Anchor Bolts, L-Bolts
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    Square Plate Washer

    Square plate washers are made from low carbon steel and have a larger surface area than round washers. Since they develop more friction when tightened against wood, they are often found in timber construction.
    Often, square plate washers are used to attach treated lumber sill plates to concrete foundations. Another common use is using square plate washers to attach wood beams to the walls of a garage, and them mount the garage door rails and equipment.