| FASTENER LENGTH | 1.250 INCHES NOMINAL |
| HEAD DIAMETER | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM |
| HEAD HEIGHT | 0.547 INCHES MINIMUM AND 0.579 INCHES MAXIMUM |
| HEAD STYLE | KNURLED NO. 4 |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A581-75 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 28 |