Thread & Dimensions
Internal thread A (in, Class 3B)
.3125-18
External thread B (in)
.500-13
External altered minor dia max (in)
.4056
C dia max (in)
.400
C dia min (in)
.395
D (in, ref)
.28
L (in, ±0.01)
.56
Material & Finish
Material
C1117 carbon steel
Finish
Cadmium plated per SAE AMS-QQ-P-416 Type II Class 2 plus solid film lubricant; Zn-Ni alternative allowed
Locking element
Nylon 6/6 per L-P-410 or equivalent
Locking element temperature
-60°F to +250°F