| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.112 INCHES |
| THREAD QUANTITY PER INCH | 40 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.420 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM |
| FASTENER LENGTH | 0.470 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 303 SECONDARY WASHER |
| COPPER ALLOY 510 OR |
| COPPER ALLOY 524 OR |
| COPPER ALLOY 544 PRIMARY WASHER |
| COPPER ALLOY 260 STAND-OFF |
| STEEL COMP 303 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| QQ-B-750 FED SPEC SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE STAND-OFF |
| ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| SURFACE TREATMENT | PASSIVATE SECONDARY WASHER |
| NICKEL PRIMARY WASHER |
| NICKEL STAND-OFF |
| PASSIVATE FASTENER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SECONDARY WASHER |
| QQ-N-290 FED SPEC SINGLE TREATMENT RESPONSE PRIMARY WASHER |
| QQ-N-290 FED SPEC SINGLE TREATMENT RESPONSE STAND-OFF |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| HEAD STYLE | PAN |
| HEAD DIAMETER | 0.205 INCHES MINIMUM AND |
| 0.219 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | SLOT |
| SPECIAL FEATURES | FLAT WASHER 0.215 OD X 0.120 ID X 0.009 IN. MIM,0.012 IN MAX THK; BUSHING 0.137 IN MIN,0.143 IN MAX.DIA; IN 0.172 IN.DIA HOLE; SPLIT LOCKWASHER 0.212 OD X 0.115 ID X 0.017 IN MIN,0.033 IN MAX THK; |