| FASTENER LENGTH | 1.563 INCHES MINIMUM AND 1.625 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| MINIMUM TENSILE STRENGTH | 69000 POUNDS PER SQUARE INCH |
| HARDNESS RATING | 100.0 ROCKWELL B MAXIMUM OVERALL |
| MINIMUM YIELD STRENGTH | 55000 POUNDS PER SQUARE INCH |
| MATERIAL | STEEL OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE GR 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| DEPARTURE FROM CITED DESIGNATOR | AS MODIFIED BY FASTENER LENGTH |