| DRIVE SURFACE SIZE | 0.250 INCHES NOMINAL SINGLE END | 
| DRIVE END OUTSIDE DIAMETER | 0.572 INCHES MAXIMUM | 
| DRIVE END SHAPE | SQUARE SINGLE END INTERNAL | 
| FEATURES PROVIDED | MANUAL TOOL | 
| MATERIAL | STEEL OVERALL | 
| NONDEFINITIVE SPEC/STD DATA | 2 CLASS | 
| OVERALL LENGTH | 1.000 INCHES MAXIMUM | 
| SPECIFICATION/STANDARD DATA | 05047-ASME B107.1 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD | 
| STYLE DESIGNATOR | INTERNAL-INTERNAL | 
| SURFACE TREATMENT | CHROMIUM OVERALL | 
| WRENCHING END OPENING DEPTH | 0.140 INCHES MINIMUM | 
| WRENCHING END OUTSIDE DIAMETER | 0.572 INCHES MAXIMUM | 
| WRENCHING SURFACE SHAPE | 8 POINT SINGLE END INTERNAL | 
| WRENCHING SURFACE SIZE | 0.312 INCHES NOMINAL SINGLE END |