| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.282 INCHES MINIMUM |
| FASTENER LENGTH | 0.343 INCHES MINIMUM AND |
| 0.375 INCHES MAXIMUM |
| MATERIAL | COPPER ALLOY SECONDARY WASHER |
| COPPER ALLOY PRIMARY WASHER |
| COPPER ALLOY 260 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-613 COMP 11 FED SPEC SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| SURFACE TREATMENT | TIN OVERALL |
| MINIMUM TENSILE STRENGTH | 55000 POUNDS PER SQUARE INCH |
| HEAD STYLE | PAN |
| HEAD DIAMETER | 0.256 INCHES MINIMUM AND |
| 0.270 INCHES MAXIMUM |
| HEAD HEIGHT | 0.087 INCHES MINIMUM AND |
| 0.097 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| WASHER QUANTITY | 2 |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.253 INCHES MAXIMUM |
| PRIMARY WASHER MATERIAL THICKNESS | 0.031 INCHES MINIMUM AND |
| 0.037 INCHES MAXIMUM |
| SECONDARY WASHER RELATIONSHIP TO PRIMARY WASHER | NOT IDENTICAL |
| SECONDARY WASHER STYLE | FLAT |
| SECONDARY WASHER OUTSIDE DIAMETER | 0.253 INCHES MINIMUM AND |
| 0.263 INCHES MAXIMUM |
| SECONDARY WASHER MATERIAL THICKNESS | 0.013 INCHES MINIMUM AND |
| 0.019 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NAS1301 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |