4-40 Pins | McMaster-Carr

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System of Measurement

Shoulder Diameter

Fastener Head Type

Shoulder Length

Drive Style

Material

18-8 Stainless Steel

Thread Length

Thread Spacing

Length

Shoulder Fit

Head Height

Head Diameter

Thread Direction

DFARS Specialty Metals

Head Width

Tensile Strength

Minimum Shear Strength

Thread Fit

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

Export Control Classification Number (ECCN)

REACH

RoHS

PEM® Part Number

Thread Type

Finish

Hardness

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40 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

Threaded Hole Location Gauges

Threaded Hole Location Gauges

Pinpoint the true center of threaded holes to precisely align and measure parts

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