Metric Allen Bolts | McMaster-Carr

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8,839 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

Ultra-Low-Profile Steel Socket Head Screws

The lowest-profile socket head screw we offer

Low-Profile Stainless Steel Socket Head Screws

Corrosion resistant with a shorter head that won't snag on components

Left-Hand-Thread Steel Socket Head Screws

Left-Hand-Thread Steel Socket Head Screws

Turn left to tighten

Ultra-Low-Profile Stainless Steel Socket Head Screws

Corrosion resistant and the lowest-profile socket head screw we offer

Low-Profile Steel Socket Head Screws with Pilot Recess

The pilot recess fits an extended-tip L-key for extra leverage

Steel Flanged Socket Head Screws

Steel Flanged Socket Head Screws

The flange spreads pressure over a wide area to protect thin and soft materials

Serrated Flanged Socket Head Screws

Serrated Flanged Socket Head Screws

The flange has a serrated edge to keep screws in place, even under mild vibration

Sealing Socket Head Screws

Sealing Socket Head Screws

Keep out dust and contaminants and lock in air and fluid

Titanium Socket Head Screws

Titanium Socket Head Screws

Lightweight like aluminum and more corrosion resistant than stainless steel

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

Plastic Socket Head Screws

Plastic Socket Head Screws

Secure parts without adding much weight

Stainless Steel Thread-Locking Socket Head Screws

Stainless Steel Thread-Locking Socket Head Screws

Corrosion resistant with a bonded nylon patch so you don't have to add threadlocker yourself

Stainless Steel Socket Head Screw Assortments

Stainless Steel Socket Head Screw Assortments

Keep different sizes of corrosion-resistant socket head screws on hand

Steel Socket Head Screw Assortments

Steel Socket Head Screw Assortments

Keep a range of socket head screw sizes on hand

Brass Socket Head Screws

Brass Socket Head Screws

A shiny look and won't rust in damp environments

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

Low-Profile Stainless Steel Socket Head Screws with Pilot Recess

Corrosion resistant with a pilot recess that fits an extended-tip L-key for extra leverage

Cleaned and Bagged Socket Head Screws for High Vacuum

Cleaned and Bagged Socket Head Screws for High Vacuum

Cleaned and double-bagged for use in high-vacuum systems that can't tolerate any contamination

Aluminum Socket Head Screws

Aluminum Socket Head Screws

One-third the weight of steel

Sealing Thread-Locking Socket Head Screws

Sealing Thread-Locking Socket Head Screws

Seal out contaminants and lock in air and fluid in vibrating systems

Venting Socket Head Screws

Venting Socket Head Screws

A hole prevents the buildup of pressure and vacuum in sealed spaces

Cleaned and Bagged Venting Socket Head Screws for High Vacuum

Cleaned and Bagged Venting Socket Head Screws for High Vacuum

Reduce the time it takes to reach vacuum conditions in high-vacuum systems

Nickel Socket Head Screws

Nickel Socket Head Screws

The strongest ultra-corrosion-resistant screws we offer

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

Set Screws

Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads

Shoulder Screws

Shoulder Screws

Rotate parts around the cylinder under the head to guide and align them during installation

Captive Panel Screws

Captive Panel Screws

Secure panels and enclosures while still having access to them

Reference Charts

Reference Charts

Check decimal equivalents, drill sizes, or specifications for socket screws

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