| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.456 INCHES MINIMUM AND |
| 0.506 INCHES MAXIMUM |
| FASTENER LENGTH | 1.900 INCHES MINIMUM AND |
| 1.920 INCHES MAXIMUM |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5616 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| HARDNESS RATING | 30.0 ROCKWELL C MINIMUM AND |
| 38.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD STYLE | DOUBLE HEXAGON W/HOLE |
| HEAD HEIGHT | 0.480 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.492 INCHES MINIMUM AND |
| 0.502 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.678 INCHES MINIMUM AND |
| 0.698 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.110 INCHES MINIMUM AND |
| 0.120 INCHES MAXIMUM |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER DIAMETER | 0.435 INCHES MINIMUM AND |
| 0.436 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 1.362 INCHES MINIMUM AND |
| 1.372 INCHES MAXIMUM FIRST SHOULDER |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.754 INCHES MINIMUM AND |
| 1.784 INCHES MAXIMUM FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.094 INCHES MINIMUM AND |
| 0.101 INCHES MAXIMUM FIRST HOLE |
| SPECIAL FEATURES | HOLES 1 AND 2 90 DEGREES APART |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 77445 |
| DESIGN CONTROL REFERENCE | 492911 |