Fastener Guides - Screws Head Styles | Fastener SuperStore

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.

At Fastener SuperStore, Inc., we supply only the highest quality fasteners. We make it our business to supply you with the durable hardware in the quantities you need.

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Binder Undercut Head Screws at FastenerSuperstore

Binder / Binding
Undercut

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

Bugle

Bugle Head - Countersunk style primarily used in drywall and wood decking.

Button

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

Fillister

Fillister Head - Smaller diameter and higher profile than round or pan heads allows for deeper slot.

Flat

Flat Head (82 degrees) - Standard countersunk flat head screw. Allows for flat, smooth surface after installation.

Flat
Undercut

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.

Flat 100

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

Flat 100
Undercut

Flat 100 Undercut Head - Used instead of flat 100 for some short screws. Allows for slightly longer thread grip.

Metric Flat Head Screws at Fastener SuperStore

Flat Metric

Flat Head (Metric) - Metric flat heads screws come standard with a 90 degree head angle.

Hex

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 Screws at Fastener SuperStore

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.

Modified Truss
Head / K Lath

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

Oval

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

Oval
Undercut

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

Pan

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.

Round

Round Head - Becoming less common, but offers an appearance alternative from other rounded head screws.

Round
Washer

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

Serrated

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.

Socket Head Cap Screws at Fastener SuperStore

Socket Cap
Screw

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.