Thread & Dimensions
A internal thread (Class 3B)
4-40 UNC
B external thread (Class 3A)
8-32 UNC
Ø max minor special
.1380
Ø C (+.008/-.002)
.116
D (+.015/-.000)
.060
F
.100
G (±.010)
.190
J (±1)
15
Through-hole preparation
Min. full THD depth .361; Min. full depth .220
Blind-hole preparation
Min. full THD depth .298; Min. full depth .220
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
Crownserts is offering part CS0440D as factory new.