Thread & Dimensions
A internal thread (Class 3B)
5/16-18 UNC
B external thread (Class 3A)
3/8-24 UNF
Ø max minor special
.3405
Ø C (+.008/-.002)
.314
D (+.015/-.000)
.110
E
.266
G (±.010)
.470
J (±1)
29
Through-hole preparation
Min. full THD depth .693; Min. full depth .505
Blind-hole preparation
Min. full THD depth .693; Min. full depth .505
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