| THREAD SERIES DESIGNATOR | UNS |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| NONSTANDARD THREAD PITCH DIAMETER | 0.3420 TO 0.3449 INCHES |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.600 INCHES MINIMUM AND |
| 0.640 INCHES MAXIMUM |
| FASTENER LENGTH | 1.240 INCHES MINIMUM AND |
| 1.260 INCHES MAXIMUM |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6304 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | NICKEL AND |
| CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2416 ASSN STD ALL TREATMENT RESPONSES OVERALL |
| HARDNESS RATING | 30.0 ROCKWELL C MINIMUM AND |
| 38.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD STYLE | DOUBLE HEXAGON W/HOLE |
| HEAD HEIGHT | 0.412 INCHES MINIMUM AND |
| 0.432 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.430 INCHES MINIMUM AND |
| 0.439 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.552 INCHES MINIMUM AND |
| 0.572 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.090 INCHES MINIMUM AND |
| 0.100 INCHES MAXIMUM |
| SHOULDER SHAPE | HEXAGONAL FIRST SHOULDER |
| SHOULDER WIDTH ACROSS FLATS | 0.435 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 0.620 INCHES MINIMUM AND |
| 0.640 INCHES MAXIMUM FIRST SHOULDER |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 77445 |
| DESIGN CONTROL REFERENCE | 329122 |