Thread & Dimensions
A internal thread (Class 3B)
7/16-20 UNF
B external thread (Class 3A)
1/2-20 UNF
Ø max minor special
.4630
Ø C (+.008/-.002)
.439
D (+.015/-.000)
.135
E
.377
G (±.010)
.660
J (±1)
39
Through-hole preparation
Min. full THD depth .920; Min. full depth .695
Blind-hole preparation
Min. full THD depth .820; Min. full depth .695
Material & Finish
Material
A286 per AMS5731 or AMS 5734
Finish
IVD ALUMINIUM coating per MIL-DTL-83488 type 2, Class 3 & SFL per SAE AS5272, Type I
Temperature range
Up to 600°F
Heat treat
RC 32-40
Magnetic
NO