DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.293 INCHES MINIMUM AND 0.298 INCHES MAXIMUM |
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 0.348 INCHES MINIMUM AND 0.378 INCHES MAXIMUM |
EXTENDED WASHER THICKNESS | 0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM |
EXTENDED WASHER DIAMETER | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM |
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 2 |
FASTENER LENGTH | 0.760 INCHES MINIMUM AND 0.780 INCHES MAXIMUM |
FIRST DIAMETER FROM HEAD | 0.250 INCHES MINIMUM AND 0.251 INCHES MAXIMUM |
HARDNESS RATING | 29.0 ROCKWELL C NOMINAL OVERALL |
HEAD HEIGHT | 0.320 INCHES MINIMUM AND 0.340 INCHES MAXIMUM |
HEAD STYLE | DOUBLE HEXAGON EXTENDED WASHER |
MATERIAL | STEEL OVERALL |
MINIMUM YIELD STRENGTH | 80000 POUNDS PER SQUARE INCH |
NOMINAL THREAD DIAMETER | 0.250 INCHES |
NONSTANDARD THREAD PITCH DIAMETER | +0.2213 TO 0.2238 INCHES |
SECOND DIAMETER FROM HEAD | 0.230 INCHES NOMINAL |
WIDTH BETWEEN FLATS | 0.304 INCHES MINIMUM AND 0.313 INCHES MAXIMUM |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.407 INCHES MINIMUM AND 0.412 INCHES MAXIMUM |
THREAD SERIES DESIGNATOR | UNF |
THREAD QUANTITY PER INCH | 28 |