| THREAD DIRECTION | RIGHT-HAND |
| FASTENER LENGTH | 0.438 INCHES NOMINAL |
| MATERIAL | STEEL COMP 601 OVERALL |
| THREAD LENGTH | 0.249 INCHES MINIMUM AND |
| 0.269 INCHES MAXIMUM |
| HEAD STYLE | DOUBLE HEXAGON W/HOLE |
| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS6304 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND |
| NICKEL OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS2416 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 42.0 ROCKWELL C MINIMUM AND |
| 46.0 ROCKWELL C MAXIMUM BEARING SURFACE OF HEAD |
| HEAD HEIGHT | 0.330 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 0.305 INCHES MINIMUM AND |
| 0.313 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.438 INCHES NOMINAL |
| EXTENDED WASHER THICKNESS | 0.060 INCHES MINIMUM AND |
| 0.070 INCHES MAXIMUM |
| GRIP LENGTH | 0.079 INCHES MINIMUM AND |
| 0.099 INCHES MAXIMUM |
| GRIP DIAMETER | 0.222 INCHES MINIMUM AND |
| 0.232 INCHES MAXIMUM |
| SURFACE FINISH | 32.0 MICROINCHES GRIP |
| SPECIAL FEATURES | O'LEVEL ATA-75 |
| REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | ITEM IS FAA CERTIFIED |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT, MACHINE-STEEL AMS6304, DIFFUSED NICKEL-CADMIUM PLATED, DOUBLE HEXAGON EXTENDED WASHER HEAD |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 0U583 |
| DESIGN CONTROL REFERENCE | MS9209-05 |