| DEPARTURE FROM CITED DESIGNATOR | ASMODIFIED BY LOCKING FEATURE |
| FASTENER LENGTH | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM |
| HARDNESS RATING | 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD STYLE | HEADLESS (SETSCREW) |
| INTERNAL DRIVE STYLE | FOUR SPLINE |
| LOCKING FEATURE | STRIP THREADS |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES FASTENER |
| MATERIAL | PLASTIC LOCKING FEATURE |
| MATERIAL | STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 FASTENER |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| NONDEFINITIVE SPEC/STD DATA | 2 TYPE AND 4 STYLE |
| POINT STYLE | CUP |
| SPLINE WIDTH | 0.022 INCHES MINIMUM AND 0.023 INCHES MAXIMUM |
| SPLINE MAJOR DIAMETER | 0.078 INCHES MINIMUM AND 0.079 INCHES MAXIMUM |
| SPLINE MINOR DIAMETER | 0.055 INCHES MINIMUM AND 0.056 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| SURFACE TREATMENT | CADMIUM AND CHROMATE FASTENER |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNC |