| MATERIAL | STEEL COMP 4140 |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD SINGLE MATERIAL RESPONSE |
| STYLE DESIGNATOR | RECESSED AND STEPPED |
| LENGTH OF RECESSED PORTION OF SHANK | 0.740 INCHES NOMINAL |
| DIAMETER OF RECESSED PORTION OF SHANK | 0.224 INCHES MINIMUM AND |
| 0.228 INCHES MAXIMUM |
| OVERALL LENGTH | 5.260 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |
| UNC STUD THREAD |
| NOMINAL THREAD SIZE | 0.250 INCHES NUT THREAD |
| 0.312 INCHES STUD THREAD |
| THREAD CLASS | 3A NUT THREAD |
| 3A STUD THREAD |
| THREAD QUANTITY PER INCH | 28 NUT THREAD |
| 18 STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.520 INCHES NOMINAL NUT THREAD |
| 0.720 INCHES NOMINAL STUD THREAD |
| FEATURES PROVIDED | CASEHARDENED |
| SPECIAL FEATURES | 5/16-24UNF 3ATHD. 0.580 IN. LG. LOCATED 1.260 IN. FROM RECESSED PORTION OF SHANK END; 0.246 IN. MIN. 0.250 IN. MAX. DIA. OF RECESSED PORTION OF SHANK OPTIONAL |
| HARDNESS RATING | 264.0 BRINELL HULTGREN MINIMUM AND |
| 301.0 BRINELL HULTGREN MAXIMUM |