| COLOR | BLACK OVERALL |
| FASTENER LENGTH | 0.500 INCHES NOMINAL |
| HEAD DIAMETER | 0.306 INCHES MINIMUM AND 0.347 INCHES MAXIMUM |
| HEAD HEIGHT | 0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM |
| HEAD STYLE | PAN |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD DIAMETER | 0.164 INCHES |
| PRIMARY WASHER MATERIAL THICKNESS | 0.040 INCHES NOMINAL |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.293 INCHES NOMINAL |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| SECONDARY WASHER MATERIAL THICKNESS | 0.025 INCHES MINIMUM AND 0.035 INCHES MAXIMUM |
| SECONDARY WASHER OUTSIDE DIAMETER | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM |
| SECONDARY WASHER RELATIONSHIP TO PRIMARY WASHER | NOT IDENTICAL |
| SECONDARY WASHER STYLE | FLAT |
| WASHER QUANTITY | 2 |
| SURFACE TREATMENT | OXIDE OVERALL |
| THREAD CLASS | 3A |
| THREAD SERIES DESIGNATOR | UNC |
| THREAD QUANTITY PER INCH | 32 |