Thread & Dimensions
A internal thread (Class 3B)
2-56 UNC
B external thread (Class 3A)
6-40 UNF
Ø max minor special
.1073
Ø C (+.008/-.002)
.086
D (+.015/-.000)
.042
E
.073
G (±.010)
.170
J (±1)
21
Through-hole preparation
Min. full THD depth .273; Min. full depth .160
Blind-hole preparation
Min. full THD depth .223; Min. full depth .160
Material & Finish
Material
17-4PH, Cond H1025 per AMS 5643
Finish
PASSIVATED per AMS 2700 & SFL coated per SAE AS5272, Type I
Temperature range
-110°/+650°F
Heat treat
RC 35-42
Magnetic
YES
Material note
Standard material code; no suffix added to the part number.