| DRIVE END OUTSIDE DIAMETER | 0.453 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |
| DRIVE END SHAPE | SQUARE SINGLE END INTERNAL |
| DRIVE SURFACE SIZE | 0.250 INCHES NOMINAL SINGLE END |
| FEATURES PROVIDED | MANUAL TOOL |
| OVERALL LENGTH | 0.875 INCHES MAXIMUM |
| MATERIAL | STEEL OVERALL |
| SPECIAL MARKINGS | 5/16 IN. |
| STYLE DESIGNATOR | INTERNAL-INTERNAL |
| SPECIAL FEATURES | SET SCREW ON ONE SIDE OF DRIVE END |
| WRENCHING END OPENING DEPTH | 0.218 INCHES NOMINAL |
| WRENCHING END OUTSIDE DIAMETER | 0.453 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |
| WRENCHING SURFACE SHAPE | 6 POINT SINGLE END INTERNAL |
| WRENCHING SURFACE SIZE | 0.312 INCHES NOMINAL SINGLE END |
| SURFACE TREATMENT | CHROMIUM OVERALL |