Mil.-Spec. Locknuts | McMaster-Carr

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System of Measurement

Thread Size

Nut Type

Material

Military Specification

Specifications Met

Locking Type

Certification

UL Recognized Component

Height

DFARS Specialty Metals

Width

Finish

Cadmium Yellow-Chromate Plated

Passivated

Silver Plated

Zinc Plated

Zinc Yellow-Chromate Plated

Hex Nut Profile

Thread Type

Thread Fit

Unified Standard Class 2A

Unified Standard Class 3A

Unified Standard Class 3B

Flange Diameter

Performance

Insert Maximum Temperature

250° F

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

Drive Style

RoHS

Export Control Classification Number (ECCN)

REACH

Screw Size

Flange Thickness

Length

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441 Products

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Fastening and Joining

Locknuts

Hold fasteners in place to prevent loosening from vibration

56 products

Flange Nuts

The flange distributes pressure, so you don't need a washer

33 products

Lock Washers

Resist vibration to prevent fasteners from loosening

137 products

Press-Fit Nuts

Push into drilled or punched holes to add threads to thin panels

10 products

Rounded Head Screws

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

165 products

Flat Head Screws

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

40 products