Round head hex drive screw #4-40 X 1/4 UNC black oxide

Technical Information

Measurement System

Imperial

Thread Type

UNC (coarse)

Diameter - Thread Size

#4-40

Length Under Head

1/4 in

Drive Type

Female hex (socket)

Material

Steel

Finish

Black oxide

Type

Fully threaded

Head Type

Round

Tensile Strength

120 000 PSI

ASME Specification

B18.3

Head Size

0.213 in W X 0.059 in H

Key Size

1/16 in

Hardness

Rockwell C39