| CONCENTRIC HOLE DEPTH | 1.090 INCHES MINIMUM AND 1.130 INCHES MAXIMUM |
| CONCENTRIC HOLE DIAMETER | 0.3340 INCHES MINIMUM AND 0.3413 INCHES MAXIMUM |
| DISTANCE FROM CENTERLINE TO FLAT | 0.2481 INCHES NOMINAL |
| FASTENER LENGTH | 1.750 INCHES MINIMUM AND 1.770 INCHES MAXIMUM |
| HARDNESS RATING | 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 0.594 INCHES MINIMUM AND 0.656 INCHES MAXIMUM |
| HEAD HEIGHT | 0.070 INCHES MINIMUM AND 0.090 INCHES MAXIMUM |
| HEAD STYLE | DEE |
| INTERNAL THREAD CLASS | 2B COUNTERBORE |
| INTERNAL THREAD DIRECTION | RIGHT-HAND COUNTERBORE |
| INTERNAL THREAD LENGTH | 0.210 INCHES MINIMUM AND 0.230 INCHES MAXIMUM COUNTERBORE |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5616 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD SIZE | 0.375 INCHES COUNTERBORE |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SHOULDER DIAMETER | 0.496 INCHES NOMINAL |
| SHOULDER LENGTH | 1.310 INCHES MINIMUM AND 1.314 INCHES MAXIMUM |
| STYLE DESIGNATOR | COUNTERBORE THREADED |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 3A |
| THREAD LENGTH | 0.436 INCHES MINIMUM AND 0.460 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNJF |
| THREAD SERIES | UNF COUNTERBORE |
| THREADS PER INCH | 24 COUNTERBORE |