| HEAD HEIGHT | 0.140 INCHES MINIMUM AND 0.150 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | BS S106 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE AND BS S96 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL OVERALL |
| MINIMUM TENSILE STRENGTH | 123200 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SECOND DIAMETER FROM HEAD | 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.431 INCHES MINIMUM AND 0.438 INCHES MAXIMUM |
| STRENGTH GRADE DESIGNATION | ERR-030 |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.600 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNF |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.200 INCHES NOMINAL |
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 0.800 INCHES NOMINAL |
| CRITICALITY CODE JUSTIFICATION | AAWC |
| FASTENER LENGTH | 1.400 INCHES NOMINAL |
| FIRST DIAMETER FROM HEAD | 0.2465 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM |
| HARDNESS RATING | 55.0 BRINELL STANDARD MINIMUM OVERALL AND 70.0 BRINELL STANDARD MAXIMUM OVERALL |