| Thread Class |
3A |
| Thread Direction |
Right-hand |
| Thread Length |
0.422 inches minimum and 0.516 inches maximum |
| Fastener Length |
0.484 inches minimum and 0.516 inches maximum |
| Head Style |
Flat Chamfer |
| Head Diameter |
0.262 inches minimum and 0.270 inches maximum |
| Head Height |
0.159 inches minimum and 0.164 inches maximum |
| Internal Drive Style |
Hexagon |
| Thread Diameter |
0.164 inches |
| Width Across Flats |
0.140 inches minimum and 0.142 inches maximum |
| Thread Qty Per Inch (TPI) |
32 |
| Min. Tensile Strength (psi) |
180000 pounds per square inch |
| Hardness Rating |
38.0 Rockwell C minimum overall and 45.0 Rockwell C maximum overall |
| Minimum Yield Strength |
155000 pounds per square inch |
| Material |
Steel overall |
| Surface Treatment |
Cadmium overall and Chromate overall |
| Surface Treatment Specification |
QQ-P-416, Type 2, Class 3 Federal Specification (All Treatment Responses Overall) |
| Thread Series Designator |
UNRC |
| Specification Data |
80205-NAS1352 Professional/Industrial Association Standard |
