| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.164 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.250 INCHES NOMINAL |
| FASTENER LENGTH | 0.800 INCHES NOMINAL |
| MATERIAL | STEEL CORROSION RESISTING SECONDARY WASHER |
| STEEL CORROSION RESISTING PRIMARY WASHER |
| STEEL CORROSION RESISTING SPRING |
| ALUMINUM ALLOY STAND-OFF |
| STEEL CORROSION RESISTING FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5059,300 SERIES MIL SPEC SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| MIL-S-5059,300 SERIES MIL SPEC SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| ASTM-A-493,300 SERIES ASSN STD SINGLE MATERIAL RESPONSE SPRING |
| QQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE STAND-OFF |
| ASTM-A-493,300 SERIES ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| SURFACE TREATMENT | PASSIVATE SECONDARY WASHER |
| PASSIVATE PRIMARY WASHER |
| PASSIVATE SPRING |
| ANODIZE STAND-OFF |
| PASSIVATE FASTENER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SECONDARY WASHER |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE PRIMARY WASHER |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SPRING |
| MIL-A-8625,TYPE 1,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE STAND-OFF |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| HEAD STYLE | KNURLED NO. 1 |
| HEAD DIAMETER | 0.299 INCHES MINIMUM AND |
| 0.324 INCHES MAXIMUM |
| HEAD HEIGHT | 0.076 INCHES MINIMUM AND |
| 0.106 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL ACCOMMODATED THICKNESS | 0.132 INCHES MINIMUM AND |
| 0.193 INCHES MAXIMUM |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |