| FASTENER LENGTH | 0.500 INCHES NOMINAL |
| HEAD HEIGHT | 0.077 INCHES NOMINAL |
| HEAD DIAMETER | 0.263 INCHES NOMINAL |
| HEAD STYLE | PAN NO. 2 |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL | COPPER SECONDARY WASHER |
| MATERIAL | COPPER ALLOY 342 FASTENER |
| MATERIAL | COPPER ALLOY 510 PRIMARY WASHER |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| PRIMARY WASHER MATERIAL THICKNESS | 0.031 INCHES NOMINAL |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.250 INCHES NOMINAL |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| SECONDARY WASHER MATERIAL THICKNESS | 0.016 INCHES NOMINAL |
| SECONDARY WASHER OUTSIDE DIAMETER | 0.250 INCHES NOMINAL |
| SECONDARY WASHER STYLE | FLAT |
| SECONDARY WASHER RELATIONSHIP TO PRIMARY WASHER | NOT IDENTICAL |
| SPECIFICATION/STANDARD DATA | 80205-NAS720 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| WASHER QUANTITY | 2 |
| SURFACE TREATMENT | TIN FASTENER |
| SURFACE TREATMENT | TIN SECONDARY WASHER |
| SURFACE TREATMENT | TIN PRIMARY WASHER |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.500 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNC |