| FASTENER LENGTH | 2.560 INCHES NOMINAL |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 0.240 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 8637 OR STEEL COMP 8640 OVERALL |
| MINIMUM TENSILE STRENGTH | 12700 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.375 INCHES |
| SHOULDER DIAMETER | 0.384 INCHES MINIMUM AND 0.389 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER DIAMETER | 0.381 INCHES MINIMUM AND 0.382 INCHES MAXIMUM OVERALL |
| SHOULDER LENGTH | 0.760 INCHES NOMINAL SECOND SHOULDER |
| SHOULDER LENGTH | 0.160 INCHES MINIMUM AND 0.240 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER SHAPE | ROUND SECOND SHOULDER |
| SHOULDER SHAPE | RIBBED FIRST SHOULDER |
| SPECIAL FEATURES | UNTHREADED PORTION BELOW HEAD 0.180 INCH LONG. SHANK BELOW SECOND SHOULDER 0.340 INCH MIN,0.350 INCH MAX DIA; 0.480 INCH LONG |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.940 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 24 |