| EXTENDED WASHER DIAMETER | 0.128 INCHES MINIMUM AND 0.138 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM |
| FASTENER LENGTH | 1.014 INCHES MINIMUM AND 1.034 INCHES MAXIMUM |
| HEAD HEIGHT | 0.293 INCHES MINIMUM AND 0.313 INCHES MAXIMUM |
| HEAD STYLE | DOUBLE HEXAGON EXTENDED WASHER |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| NOMINAL THREAD DIAMETER | 0.190 INCHES |
| SHOULDER DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 0.589 INCHES MINIMUM AND 0.599 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SPECIAL FEATURES | 0.047 MIN. TO 0.062 MAX. THREAD RELIEF |
| WIDTH BETWEEN FLATS | 0.312 INCHES NOMINAL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.415 INCHES MINIMUM AND 0.445 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |