| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.164 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.245 INCHES MINIMUM AND |
| 0.255 INCHES MAXIMUM |
| FASTENER LENGTH | 0.635 INCHES NOMINAL |
| MATERIAL | STEEL COMP 301 SECONDARY WASHER |
| STEEL COMP 1050 PRIMARY WASHER |
| STEEL COMP 302 SPRING |
| ALUMINUM ALLOY 6061 STAND-OFF |
| STEEL CORROSION RESISTING FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5059 TY 301 MIL SPEC SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| AISI 1050 ASSN STD SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| QQ-W-423,FORM 1 FED SPEC SINGLE MATERIAL RESPONSE SPRING |
| QQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE STAND-OFF |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE PRIMARY WASHER |
| ANODIZE STAND-OFF |
| PASSIVATE FASTENER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE PRIMARY WASHER |
| MIL-A-8625,TY 1,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE STAND-OFF |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| HEAD STYLE | KNURLED NO. 1 |
| HEAD DIAMETER | 0.420 INCHES NOMINAL |
| HEAD HEIGHT | 0.495 INCHES NOMINAL |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL ACCOMMODATED THICKNESS | 0.094 INCHES MINIMUM AND |
| 0.155 INCHES MAXIMUM |