4-40 Pins | McMaster-Carr

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System of Measurement

Shoulder Diameter

Fastener Head Type

Shoulder Length

Drive Style

Thread Length

Material

18-8 Stainless Steel

Length

Thread Spacing

Hardness

Head Diameter

Head Height

DFARS Specialty Metals

Shoulder Fit

Tensile Strength

PEM® Part Number

Thread Direction

Export Control Classification Number (ECCN)

REACH

RoHS

Thread Fit

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

Head Width

Thread Type

Finish

Threading

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40 Products

Shoulder Screws

Precise Shoulder Fit

Steel Headless Slotted Precision Shoulder Screws

Steel Headless Slotted Precision Shoulder Screws

Flush mount in countersunk holes or use as pins for aligning parts

Other Products

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

Plug Gauges

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

Stud Welders

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

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.)