| EXTENDED WASHER DIAMETER | 1.245 INCHES MINIMUM AND 1.255 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM |
| FASTENER LENGTH | 1.511 INCHES MINIMUM AND 1.521 INCHES MAXIMUM |
| HEAD DIAMETER | 0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM |
| HEAD HEIGHT | 0.417 INCHES MINIMUM AND 0.427 INCHES MAXIMUM |
| HEAD STYLE | FLAT EXTENDED WASHER |
| INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 630 OVERALL |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| SPECIAL FEATURES | 2 HOLES IN WASER DIRECTLY OPPOSITE EACH OTHER 0.122-0.128 IN. DIA; TOP OF HEAD CHAMFERED 15.0 DEG X 0.380 IN. |
| PRIMARY WASHER OUTSIDE DIAMETER | 1.245 INCHES MINIMUM AND 1.255 INCHES MAXIMUM |
| PRIMARY WASHER STYLE | FLAT |
| PRIMARY WASHER MATERIAL THICKNESS | 0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM |
| WASHER QUANTITY | 1 |
| 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 | 1.361 INCHES MINIMUM AND 1.371 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNF |