| FASTENER LENGTH | 0.438 INCHES NOMINAL |
| HEAD DIAMETER | 0.407 INCHES MINIMUM AND 0.425 INCHES MAXIMUM |
| HEAD HEIGHT | 0.139 INCHES MINIMUM AND 0.151 INCHES MAXIMUM |
| HEAD STYLE | PAN |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MATERIAL | STEEL COMP 1010 FASTENER |
| MATERIAL | STEEL PRIMARY WASHER |
| NOMINAL THREAD DIAMETER | 0.216 INCHES |
| PRIMARY WASHER MATERIAL THICKNESS | 0.025 INCHES NOMINAL |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.556 INCHES MINIMUM AND 0.569 INCHES MAXIMUM |
| PRIMARY WASHER STYLE | DOME EXTERNAL AND INTERNAL TEETH |
| WASHER QUANTITY | 1 |
| SURFACE TREATMENT | PHOSPHATE OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.355 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |