| MATERIAL | STEEL COMP 8740 OR |
| STEEL COMP 8640 OR |
| STEEL COMP 4140 OR |
| STEEL COMP 8742H OR |
| STEEL COMP 8642 |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A322 ASSN STD 1ST MATERIAL RESPONSE OR |
| ASTM A331 ASSN STD 1ST MATERIAL RESPONSE OR |
| ASTM A322 ASSN STD 2ND MATERIAL RESPONSE OR |
| ASTM A331 ASSN STD 2ND MATERIAL RESPONSE OR |
| ASTM A322 ASSN STD 3RD MATERIAL RESPONSE OR |
| ASTM A331 ASSN STD 3RD MATERIAL RESPONSE OR |
| SAE ASSN STD 4TH MATERIAL RESPONSE OR |
| SAE ASSN STD 5TH MATERIAL RESPONSE |
| OVERALL LENGTH | 1.407 INCHES MINIMUM AND |
| 1.469 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |
| UNS STUD THREAD |
| NOMINAL THREAD SIZE | 0.312 INCHES NUT THREAD |
| 0.312 INCHES STUD THREAD |
| THREAD CLASS | 2A NUT THREAD |
| THREAD QUANTITY PER INCH | 24 NUT THREAD |
| 18 STUD THREAD |
| THREAD PITCH DIAMETERS | 0.2820 TO 0.2832 INCHES STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.625 INCHES MINIMUM NUT THREAD |
| 0.562 INCHES MINIMUM STUD THREAD |
| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND |
| 32.0 ROCKWELL C MAXIMUM |
| DISTANCE FROM COTTER PIN HOLE CENTERLINE TO NUT END | 0.203 INCHES NOMINAL FIRST HOLE |
| COTTER PIN HOLE DIAMETER | 0.073 INCHES MINIMUM AND |
| 0.082 INCHES MAXIMUM FIRST HOLE |