| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.712 INCHES MINIMUM AND 1.720 INCHES MAXIMUM FIRST HOLE |
| FASTENER LENGTH | 1.780 INCHES MINIMUM AND 1.800 INCHES MAXIMUM |
| HARDNESS RATING | 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| NONSTANDARD THREAD PITCH DIAMETER | +0.2213 TO 0.2238 INCHES |
| SHANK UNTHREADED HOLE DIAMETER | 0.062 INCHES MINIMUM AND 0.065 INCHES MAXIMUM FIRST HOLE |
| SHOULDER DIAMETER | 0.3715 INCHES MINIMUM AND 0.3730 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 1.509 INCHES MINIMUM AND 1.513 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| PRECIOUS MATERIAL | SILVER |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNF |
| WIDTH BETWEEN FLATS | 0.493 INCHES MINIMUM AND 0.502 INCHES MAXIMUM |
| SURFACE TREATMENT | SILVER OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.287 INCHES MINIMUM |