Thread & Dimensions
Internal thread A (in, Class 3B)
.5625-12 UNC
External thread B (in)
.6875-12 UN
External altered minor dia max (in)
.6130
C (in, ±.010)
.840
D dia (in, +.008/-.002)
.571
E (in, +.015/-.000)
.145
F (in, ref)
.135
G (in, ref)
.550
Min shear engagement (in²)
1.1328
Counterbore depth (in)
.150
Full thread depth min (in)
.873
Blind-hole drill depth min (in)
1.081
Material & Finish
Material
A286 CRES
Finish
Silver plated per SAE AMS2411 grade B, at least 0.0002 in
Hardness
32–40 HRC