| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 0.348 INCHES MINIMUM AND 0.373 INCHES MAXIMUM |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.293 INCHES MINIMUM AND 0.298 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM |
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 2 |
| FASTENER LENGTH | 0.760 INCHES MINIMUM AND 0.780 INCHES MAXIMUM |
| FIRST DIAMETER FROM HEAD | 0.266 INCHES NOMINAL |
| HEAD HEIGHT | 0.320 INCHES MINIMUM AND 0.340 INCHES MAXIMUM |
| HEAD STYLE | DOUBLE HEXAGON W/HOLE |
| MATERIAL DOCUMENT AND CLASSIFICATION | C50T35 FSCM 07482 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SECOND DIAMETER FROM HEAD | 0.203 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 0.304 INCHES MINIMUM AND 0.313 INCHES MAXIMUM |
| THREAD CLASS | 1A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.407 INCHES MINIMUM AND 0.412 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNF |