| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.164 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.202 INCHES MINIMUM AND |
| 0.250 INCHES MAXIMUM |
| FASTENER LENGTH | 0.218 INCHES MINIMUM AND |
| 0.250 INCHES MAXIMUM |
| MATERIAL | COPPER ALLOY 260 OR |
| COPPER ALLOY 268 SECONDARY WASHER |
| COPPER ALLOY 510 PRIMARY WASHER |
| COPPER ALLOY 230 OR |
| COPPER ALLOY 240 OR |
| COPPER ALLOY 260 OR |
| COPPER ALLOY 268 OR |
| COPPER ALLOY 342 OR |
| COPPER ALLOY 353 OR |
| COPPER ALLOY 360 OR |
| COPPER ALLOY 377 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-P-613 FED SPEC SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| QQ-P-750,COMP A FED SPEC SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| SURFACE TREATMENT | TIN OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-N-290 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| MINIMUM TENSILE STRENGTH | 55000 POUNDS PER SQUARE INCH |
| HEAD STYLE | PAN NO. 2 |
| HEAD DIAMETER | 0.306 INCHES MINIMUM AND |
| 0.322 INCHES MAXIMUM |
| HEAD HEIGHT | 0.085 INCHES MINIMUM AND |
| 0.096 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) |
| WASHER QUANTITY | 2 |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.293 INCHES MAXIMUM |
| PRIMARY WASHER MATERIAL THICKNESS | 0.040 INCHES MINIMUM |
| SECONDARY WASHER RELATIONSHIP TO PRIMARY WASHER | NOT IDENTICAL |
| SECONDARY WASHER STYLE | FLAT |
| SECONDARY WASHER OUTSIDE DIAMETER | 0.307 INCHES MINIMUM AND |
| 0.317 INCHES MAXIMUM |
| SECONDARY WASHER MATERIAL THICKNESS | 0.013 INCHES MINIMUM AND |
| 0.019 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NAS720 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |