| THREAD SERIES DESIGNATOR | UNRC |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.170 INCHES MINIMUM AND |
| 0.210 INCHES MAXIMUM |
| FASTENER LENGTH | 0.594 INCHES MINIMUM AND |
| 0.625 INCHES MAXIMUM |
| MATERIAL | STEEL PRIMARY WASHER |
| IRON ALLOY 660 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-766, 300 SERIES ASSN STD ALL MATERIAL RESPONSES PRIMARY WASHER |
| AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| SURFACE TREATMENT | PASSIVATE PRIMARY WASHER |
| PASSIVATE FASTENER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE PRIMARY WASHER |
| QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| MINIMUM YIELD STRENGTH | 90000 POUNDS PER SQUARE INCH |
| HEAD STYLE | FLAT CHAMFER |
| HEAD DIAMETER | 0.218 INCHES MINIMUM AND |
| 0.226 INCHES MAXIMUM |
| HEAD HEIGHT | 0.134 INCHES MINIMUM AND |
| 0.138 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.109 INCHES MINIMUM AND |
| 0.111 INCHES MAXIMUM |
| WASHER QUANTITY | 1 |
| PRIMARY WASHER STYLE | FLAT |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.262 INCHES MINIMUM AND |
| 0.282 INCHES MAXIMUM |
| PRIMARY WASHER MATERIAL THICKNESS | 0.016 INCHES MINIMUM AND |
| 0.020 INCHES MAXIMUM |
| FEATURES PROVIDED | DRY FILM LUBRICANT |