| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.290 INCHES MINIMUM AND |
| 0.310 INCHES MAXIMUM |
| FASTENER LENGTH | 0.883 INCHES NOMINAL |
| MATERIAL | STEEL COMP 301 SECONDARY WASHER |
| STEEL PRIMARY WASHER |
| STEEL COMP 303 SPRING |
| IRON ALLOY 660 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| ASTM A29 ASSN STD SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| QQ-S-423, COND B FED SPEC SINGLE MATERIAL RESPONSE SPRING |
| AMS 5734 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| SURFACE TREATMENT | PASSIVATE SECONDARY WASHER |
| CADMIUM AND |
| CHROMATE PRIMARY WASHER |
| PASSIVATE SPRING |
| PASSIVATE FASTENER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SECONDARY WASHER |
| QQ-P-416, TYPE 2, CLASS 2 FED SPEC ALL TREATMENT RESPONSES PRIMARY WASHER |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SPRING |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.134 INCHES MINIMUM AND |
| 0.138 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.244 INCHES MINIMUM AND |
| 0.250 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.142 INCHES MINIMUM AND |
| 0.144 INCHES MAXIMUM |
| MATERIAL ACCOMMODATED THICKNESS | 0.281 INCHES MINIMUM AND |
| 0.311 INCHES MAXIMUM |