| FASTENER LENGTH | 1.438 INCHES MINIMUM AND 1.500 INCHES MAXIMUM |
| HEAD DIAMETER | 0.473 INCHES MINIMUM AND 0.492 INCHES MAXIMUM |
| HEAD HEIGHT | 0.130 INCHES MINIMUM AND 0.144 INCHES MAXIMUM |
| HEAD STYLE | PAN NO. 2 |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| PRIMARY WASHER MATERIAL THICKNESS | 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.494 INCHES MINIMUM AND 0.510 INCHES MAXIMUM |
| PRIMARY WASHER STYLE | FLAT EXTERNAL TEETH |
| WASHER QUANTITY | 1 |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.338 INCHES MINIMUM AND 1.500 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNC |