6-40 Nuts | McMaster-Carr

Filter by

System of Measurement

Thread Size

Material

Nut Type

Width

Height

Thread Spacing

Thread Type

Hex Nut Profile

Finish

Thread Direction

Locking Type

Specifications Met

Thread Fit

REACH

RoHS

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

DFARS Specialty Metals

Fastener Strength Rating

Performance

Drive Style

Minimum Temperature

Maximum Temperature

How can we improve?

50 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.)