| FASTENER LENGTH | 0.970 INCHES MINIMUM AND 1.000 INCHES MAXIMUM |
| HEAD HEIGHT | 0.270 INCHES MINIMUM AND 0.295 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE |
| MATERIAL DOCUMENT AND CLASSIFICATION | FF-B-575 FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-631 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| PRIMARY WASHER MATERIAL THICKNESS | 0.094 INCHES NOMINAL |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.635 INCHES MINIMUM AND 0.651 INCHES MAXIMUM |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| SPECIAL FEATURES | DRILLED HOLE IN THREADED END 0.166 IN. DIA,0.270 INS HOLE CENTER TO END OF FASTENER,USED FOR INSERTION OF NYLON PELLET |
| WASHER QUANTITY | 1 |
| WIDTH BETWEEN FLATS | 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 2A |
| THREAD LENGTH | 0.836 INCHES MINIMUM AND 0.866 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNC |
| THREAD QUANTITY PER INCH | 16 |