| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.370 INCHES MINIMUM AND 1.394 INCHES MAXIMUM FIRST HOLE |
| CHAMFER ANGLE | 45.0 DEGREES NOMINAL |
| CONCENTRIC HOLE DEPTH | 0.420 INCHES MINIMUM AND 0.444 INCHES MAXIMUM |
| CONCENTRIC HOLE DIAMETER | 0.276 INCHES MINIMUM AND 0.286 INCHES MAXIMUM |
| FASTENER LENGTH | 1.520 INCHES MINIMUM AND 1.560 INCHES MAXIMUM |
| HEAD HEIGHT | 0.120 INCHES MINIMUM AND 0.140 INCHES MAXIMUM |
| HEAD STYLE | SQUARE |
| HEAD LENGTH | 0.640 INCHES MINIMUM AND 0.660 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS7471 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | NICKEL OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SHANK UNTHREADED HOLE DIAMETER | 0.065 INCHES MINIMUM AND 0.072 INCHES MAXIMUM FIRST HOLE |
| SHOULDER DIAMETER | 0.403 INCHES MINIMUM AND 0.404 INCHES MAXIMUM |
| SHOULDER LENGTH | 0.300 INCHES MINIMUM AND 0.304 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.552 INCHES MINIMUM AND 0.560 INCHES MAXIMUM |
| STYLE DESIGNATOR | CONCENTRIC HOLE UNTHREADED |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 3A |
| THREAD LENGTH | 0.750 INCHES MINIMUM AND 0.830 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNJF |