4-40 Pins | McMaster-Carr

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System of Measurement

Thread Size

Fastener Head Type

Shoulder Diameter

Shoulder Length

Thread Length

Drive Style

Material

Length

Head Height

Head Diameter

Thread Fit

Shoulder Fit

Threading

REACH Compliance

USMCA Qualifying

PEM® Part Number

Specifications Met

Finish

Thread Spacing

Minimum Shear Strength

Thread Type

DFARS Compliance

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34 Products

Fastening and Joining

Shoulder Screws

Shoulder Screws

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

Tighten and loosen by hand without the need for tools

Studs

Press, weld, or screw in place to add a threaded fastening point

Machine Keys

Transmit torque from rotating shafts to gears, sprockets, and other machine parts

Stud Welders

Join studs and pins to metal, leaving no marks on the back of the material

Measuring and Inspecting

Plug Gauges

Verify the diameter or threads of machined holes in finished parts; also called pin gauges

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