| HARDNESS RATING | 50.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM |
| HEAD THICKNESS | 0.175 INCHES NOMINAL |
| OUTSIDE DIAMETER | 0.380 INCHES NOMINAL |
| REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | AS DIFFERENTIATED BY US SPECIFICATION |
| WRENCHING END OFFSET ANGLE | 15.0 DEGREES NOMINAL |
| WRENCHING SURFACE SHAPE | 12 POINT SINGLE END INTERNAL |
| WRENCHING SURFACE SIZE | 0.312 INCHES NOMINAL SINGLE END |
| STYLE DESIGNATOR | DOUBLE OFFSET SINGLE HEAD |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B177 NATIONAL STD SINGLE TREATMENT RESPONSE OR DEF STAN 03-5 MIL STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CHROMIUM OR NICKEL OVERALL |
| TORQUE CAPACITY | 250.0 INCH-POUNDS NOMINAL |