| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.405 INCHES NOMINAL |
| FASTENER LENGTH | 0.405 INCHES NOMINAL |
| MATERIAL | STEEL COMP 302 SPRING |
| ALUMINUM ALLOY 6061 AND |
| STEEL COMP 301 OR |
| STEEL COMP 1050 STAND-OFF |
| STEEL COMP 303 THREADS |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-W-423 FORM I COND B FED SPEC SINGLE MATERIAL RESPONSE SPRING |
| QQ-A-225/8 FED SPEC 1ST MATERIAL RESPONSE AND |
| MIL-S-5059 MIL SPEC 2ND MATERIAL RESPONSE AND |
| AISI ASSN STD 3RD MATERIAL RESPONSE STAND-OFF |
| ASTM A-493 ASSN STD SINGLE MATERIAL RESPONSE THREADS |
| SURFACE TREATMENT | PASSIVATE SPRING |
| PASSIVATE AND |
| ANODIZE AND |
| CADMIUM AND |
| CHROMATE STAND-OFF |
| PASSIVATE THREADS |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SPRING |
| QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE AND |
| MIL-A-8625 TY1 CL 1 MIL SPEC 2ND TREATMENT RESPONSE AND |
| QQ-P-416 TY2 CL2 FED SPEC 3RD TREATMENT RESPONSE AND |
| QQ-P-416 TY2 CL2 FED SPEC 4TH TREATMENT RESPONSE STAND-OFF |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE THREADS |
| HEAD STYLE | KNURLED NO. 1 |
| HEAD DIAMETER | 0.356 INCHES NOMINAL |
| HEAD HEIGHT | 0.385 INCHES NOMINAL |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL ACCOMMODATED THICKNESS | 0.020 INCHES MINIMUM AND |
| 0.031 INCHES MAXIMUM |