6-40 Nuts | McMaster-Carr

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System of Measurement

Thread Size

4-40 to 5/16"-32

Material

Stainless Steel

Width

Nut Type

Height

Thread Type

Thread Spacing

Hex Nut Profile

Finish

Thread Direction

Locking Type

Performance

Corrosion Resistant

Vibration Resistant

Specifications Met

Fastener Strength Rating

Thread Fit

Metric Class 6g

Metric Class 6H

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3B

REACH

Export Control Classification Number (ECCN)

RoHS

Drive Style

DFARS Specialty Metals

Hex Length

Gender

Color

Flange Diameter

Cap Nut Profile

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58 Products

Fastening and Joining

Hex Nuts

Handle most general fastening needs

Locknuts

Hold fasteners in place to prevent loosening from vibration

Flange Nuts

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

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

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