ASTM Cap Screws | McMaster-Carr

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ASTM Grade A325

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6,279 Products

Socket Head Screws

Steel Socket Head Screws

Steel Socket Head Screws

The standard for high-strength fastening

Stainless Steel Socket Head Screws

Stainless Steel Socket Head Screws

Won't rust or corrode when exposed to moisture and chemicals

Low-Profile Steel Socket Head Screws

The shorter head won't snag on components

Steel Torx Plus Socket Head Screws

Steel Torx Plus Socket Head Screws

Repeatedly tighten without stripping the socket

Steel Thread-Locking Socket Head Screws

Steel Thread-Locking Socket Head Screws

Lock parts in place on vibrating machinery without having to add threadlocker yourself

Left-Hand-Thread Steel Socket Head Screws

Left-Hand-Thread Steel Socket Head Screws

Turn left to tighten

Steel Socket Head Screws for High-Pressure Applications

Steel Socket Head Screws for High-Pressure Applications

Fasten tanks, valves, and flanges in high-pressure environments up to 1,100° F

Steel Socket Head Screws with Flat Washer

Steel Socket Head Screws with Flat Washer

A freely rotating washer protects thin and soft surfaces from damage

Stainless Steel Wire-Locking Socket Head Screws

Stainless Steel Wire-Locking Socket Head Screws

Our most vibration- and corrosion-resistant socket head screws

Stainless Steel Socket Head Screws with Split Lock Washer

Stainless Steel Socket Head Screws with Split Lock Washer

Corrosion resistant and won't come loose from light vibration

Nylon-Tip Socket Head Screws

Nylon-Tip Socket Head Screws

Keep delicate, painted, and polished surfaces pristine

Brass-Tip Socket Head Screws

Brass-Tip Socket Head Screws

Stronger than nylon and still won't damage hard plastic and soft metals

Steel Socket Head Screw Assortments

Steel Socket Head Screw Assortments

Keep a range of socket head screw sizes on hand

Other Products

Rounded Head Screws

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

Flat Head Screws

Flat Head Screws

Fit in countersunk holes for a flush finish that won't snag on surrounding parts

Hex Head Screws

Hex Head Screws

Used with nuts to create a stronger joint than flat and rounded screws

Square Head Screws

Square Head Screws

Turn the large flat sides with a wrench into square holes that stop further rotation

Captive Panel Screws

Captive Panel Screws

Secure panels and enclosures while still having access to them

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)