THREAD SERIES DESIGNATOR | UNF |
NOMINAL THREAD DIAMETER | 0.138 INCHES |
THREAD QUANTITY PER INCH | 40 |
THREAD CLASS | 2A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.125 INCHES MAXIMUM |
FASTENER LENGTH | 0.125 INCHES NOMINAL |
MATERIAL | STEEL COMP 4037 OR |
| STEEL COMP 4137 OR |
| STEEL COMP 4140 OR |
| STEEL COMP 8630 OR |
| STEEL COMP 8740 OVERALL |
MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
HARDNESS RATING | 45.0 ROCKWELL C MINIMUM AND |
| 53.0 ROCKWELL C MAXIMUM OVERALL |
HEAD STYLE | HEADLESS (SETSCREW) |
INTERNAL DRIVE STYLE | FOUR SPLINE |
SPLINE MINOR DIAMETER | 0.063 INCHES MINIMUM AND |
| 0.064 INCHES MAXIMUM |
SPLINE MAJOR DIAMETER | 0.073 INCHES MINIMUM AND |
| 0.074 INCHES MAXIMUM |
SPLINE WIDTH | 0.015 INCHES MINIMUM AND |
| 0.016 INCHES MAXIMUM |
POINT STYLE | OVAL |
NONDEFINITIVE SPEC/STD DATA | 2 TYPE AND |
| 3 STYLE |
DEPARTURE FROM CITED DESIGNATOR | AS MODIFIED BY THREAD CLASS |
SPEC/STD CONTROLLING DATA | |
MANUFACTURERS CODE | 81348 |
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | FFS103 |