Thread & Dimensions
A internal thread (Class 3B)
8-32 UNC
B external thread (Class 3A)
12-28 UNF
Ø max minor special
.1890
Ø C (+.008/-.002)
.169
D (+.015/-.000)
.080
E
.138
G (±.010)
.250
J (±1)
20
Through-hole preparation
Min. full THD depth .441; Min. full depth .280
Blind-hole preparation
Min. full THD depth .369; Min. full depth .280
Material & Finish
Material
Alloy Steel 4130 per AMS 6370
Finish
Cadmium Plated per AMS-QQ-P-416 Type 2, Class 3 & SFL per SAE AS5272
Temperature range
Up to 450+°F
Heat treat
RC 25-34
Magnetic
YES