Flat head screwno slot

Oval Head - Countersunk screw head that includes a decorative rounded finish at the top. Often used for switch coverings.

Serrated - While not a single head style, serrations on the bottom are an option on some head types. The serrations on the underside allow for tighter hold while also resisting loosening.

Flat HeadMachineScrew

Flat Undercut Head (82 degrees) - Used instead of standard flat head for some short sizes. Allows for more shallow countersinking than standard 82 degree flat heads.

Pan Head - Most common type of rounded-top screw head. Used in many applications when a flat bottomed screw is required. Can be successfully substituted for many similar head styles.

Hex Head - Common in bolts, hex heads allow for greater torque and are driven with the drivers force against the outside of the head, unlike most drives, which are internally driven.

Hex Washer Head - Newer and more common version of the hex head. Attached washer style flange under the head creates larger surface connection area. Sometimes available in combination with phillips or slotted drive.

Oval Undercut Head - Used in some shorter screw lengths to allow for longer thread grip and more shallow countersinking.

Flat Head Screwfor Wood

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Button Head - Rounded head most often used in socket driven screws. Becoming more common with Torx / Six-lobe drives as well.

Modified Truss Head / K Lath - Provides extra large bearing surface with low profile / clearance. Very similar to Round Washer Head Style.

Every screw and bolt has a head that is unique to it's intended function. Below is your basic guide to screw head styles and their uses.

PanHead screw

Flat HeadBolt

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Wafer Head - Most commonly found in Self-Drilling Screws. Provides bearing surface while still able to countersink into soft materials.

Flat Headscrews for Metal

Truss Head - Sometimes called a mushroom head, provides a larger bearing surface and a lower profile than pan or round heads.

Round Washer Head - Creates larger bearing surface in situations where rounded head is preferred. Very similar to Modified Truss Head Style.

Socket Cap Screw Heads - A style unique to socket drive screws, these heads are often installed flush with the surrounding materials, providing a smooth appearance with easy access to the drive.

Binder / Binder Undercut - Often used for electrical applications. The undercut area beneath the head allows space for wire connections.

Flat 100 Head - Uses a 100 degree angle rather than the standard 82 degree. Used for thinner materials that require a flat head.

Trim Head - An option to flat head screws, providing a narrower head. Often used as a finishing screw for carpentry and woodworking.