| FASTENER LENGTH | 7.708 INCHES MINIMUM AND 7.728 INCHES MAXIMUM |
| HEAD HEIGHT | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 1117 OVERALL |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| POINT CHAMFER ANGLE | 90.0 DEGREES NOMINAL |
| POINT DIAMETER | 0.372 INCHES MINIMUM AND 0.373 INCHES MAXIMUM |
| POINT LENGTH | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM |
| POINT STYLE | FLAT |
| SPECIAL FEATURES | GROOVE IN SHANK 2.689 IN. MIN,2.719 IN. MAX FROM TOP OF HEAD,0.252 IN. MIN,0.254 IN. MAX W BY 0.365 IN. MIN,0.370 IN. MAX DIA |
| WIDTH BETWEEN FLATS | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 2.490 INCHES MINIMUM AND 2.510 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 20 |