Allen Screws | McMaster-Carr

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System of Measurement

Thread Size

Length

Material

Fastener Head Type

Drive Style

Hex with Pilot Recess

Finish

Titanium Carbon Nitride (TiCN) Coated

Threading

Threaded on Both Ends

Socket Head Profile

Head Diameter

Shoulder Diameter

Shoulder Length

Thread Pitch

Head Height

Tip Type

Thread Type

Drive Size

Thread Spacing

Thread Direction

Specifications Met

Federal Specification

ISO Standard

SAE Standard

Tensile Strength

Less than 20,000 psi

20,000 psi to 49,999 psi

50,000 psi to 79,999 psi

80,000 psi to 99,999 psi

100,000 psi or greater

Not Rated

DFARS Specialty Metals

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Export Control Classification Number (ECCN)

24,501 Products

Fastening and Joining

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

7,915 products

Rounded Head Screws

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

2,620 products

Flat Head Screws

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

2,523 products

Set Screws

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

4,776 products

Shoulder Screws

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

6,448 products

Captive Panel Screws

Secure panels and enclosures while still having access to them

129 products

Thumb Screws

Tighten and loosen by hand without the need for tools

56 products

Fabricating and Machining

Lathe Tool Insert Holder Replacement Parts

Replace clamps, screws, shims, and other parts in lathe tool insert holders

26 products

Communication

Reference Charts

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

2 products

Building and Machinery Hardware

Protective Caps

Protect just about anything, including pipe, flanges, screws, and posts

4 products

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

3 products

Slip-On Framing and Fittings

Insert rails into fittings and tighten screws to make guards, railings, and racks

2 products