Thread & Dimensions
A internal thread (Class 3B)
1/2-20 UNF
B external thread (Class 3A)
5/8-18UNF
Ø max minor special
.5618
Ø C (+.008/-.002)
.528
D (+.015/-.000)
.135
F ref
.490
G (±.010)
.750
Through-hole preparation
Min. full THD depth 1.035; Min. full depth 0,785
Blind-hole preparation
Min. full THD depth .924; Min. full depth 0,785
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