| CONCENTRIC HOLE DIAMETER | 0.501 INCHES MINIMUM AND 0.506 INCHES MAXIMUM |
| FASTENER LENGTH | 0.860 INCHES MINIMUM AND 0.890 INCHES MAXIMUM |
| HEAD DIAMETER | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM |
| HEAD HEIGHT | 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM |
| HEAD STYLE | ROUND W/WRENCH FLATS |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 630 OVERALL |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| WIDTH BETWEEN FLATS | 0.500 INCHES MINIMUM AND 0.515 INCHES MAXIMUM |
| STYLE DESIGNATOR | CONCENTRIC HOLE UNTHREADED |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.423 INCHES MINIMUM AND 0.828 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| THREAD QUANTITY PER INCH | 13 |