| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.271 INCHES MINIMUM |
| FASTENER LENGTH | 0.365 INCHES MINIMUM AND |
| 0.385 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 4032 OR |
| STEEL COMP 4037 OR |
| STEEL COMP 4137 OR |
| STEEL COMP 4140 OR |
| STEEL COMP 8630 OR |
| STEEL COMP 8740 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AISI ASSN STD ALL MATERIAL RESPONSES OR |
| 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 3 FED SPEC ALL TREATMENT RESPONSES 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 | 0.078 INCHES MINIMUM AND |
| 0.079 INCHES MAXIMUM |
| SPLINE MAJOR DIAMETER | 0.055 INCHES MINIMUM AND |
| 0.056 INCHES MAXIMUM |
| SPLINE WIDTH | 0.022 INCHES MINIMUM AND |
| 0.023 INCHES MAXIMUM |
| LOCKING FEATURE | PATCH THREADS |
| POINT STYLE | CONE |
| SPECIFICATION/STANDARD DATA | 08935-525-0004-01/INACTIVE/ MANUFACTURERS SPECIFICATION CONTROL |
| SUPPLEMENTARY FEATURES | PATCH LOCK CONFORMS TO MIL-F-18240 CONFIG D |