| EXTENDED WASHER DIAMETER | 0.500 INCHES NOMINAL |
| EXTENDED WASHER THICKNESS | 0.028 INCHES MINIMUM AND 0.033 INCHES MAXIMUM |
| FASTENER LENGTH | 0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM |
| HEAD HEIGHT | 0.096 INCHES MINIMUM AND 0.106 INCHES MAXIMUM |
| HEAD DIAMETER | 0.437 INCHES NOMINAL |
| HEAD STYLE | ROUND EXTENDED WASHER |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| LOCKING FEATURE | PELLET THREADS |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 2330 OVERALL |
| MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OR ZINC OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.313 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNF |