| FASTENER LENGTH | 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM |
| HARDNESS RATING | 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD STYLE | HEADLESS (SETSCREW) |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL |
| NOMINAL THREAD DIAMETER | 0.086 INCHES |
| POINT STYLE | CUP |
| SPLINE WIDTH | 0.016 INCHES MINIMUM AND 0.017 INCHES MAXIMUM |
| SPLINE MAJOR DIAMETER | 0.049 INCHES MINIMUM AND 0.050 INCHES MAXIMUM |
| SPLINE MINOR DIAMETER | 0.037 INCHES MINIMUM AND 0.038 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.072 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 56 |
| THREAD SERIES DESIGNATOR | UNC |