| EXTENDED WASHER DIAMETER | 0.550 INCHES MINIMUM AND 0.570 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM |
| FASTENER LENGTH | 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM |
| HEAD HEIGHT | 0.380 INCHES MINIMUM AND 0.400 INCHES MAXIMUM |
| HEAD STYLE | DOUBLE HEXAGON EXTENDED WASHER |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 7477 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| NOMINAL THREAD DIAMETER | 0.313 INCHES |
| SHOULDER DIAMETER | 0.374 INCHES NOMINAL ALL SHOULDERS |
| SHOULDER SHAPE | ROUND ALL SHOULDERS |
| SHOULDER LENGTH | 1.280 INCHES MINIMUM AND 1.290 INCHES MAXIMUM ALL SHOULDERS |
| SPECIAL FEATURES | USED ON TFE 1042 |
| WIDTH BETWEEN FLATS | 0.427 INCHES MINIMUM AND 0.438 INCHES MAXIMUM |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.460 INCHES MINIMUM AND 0.470 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |
| THREAD QUANTITY PER INCH | 24 |