| FASTENER LENGTH | 0.750 INCHES NOMINAL |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.150 INCHES MINIMUM AND 0.428 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.438 INCHES MAXIMUM |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| MINIMUM TENSILE STRENGTH | 74000 POUNDS PER SQUARE INCH |
| HARDNESS RATING | 23.0 ROCKWELL B MINIMUM AND 80.0 ROCKWELL B MAXIMUM OVERALL |
| MATERIAL | STEEL OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE GR 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| NONDEFINITIVE SPEC/STD DATA | 2 TYPE AND 1 STYLE AND 2 GRADE |