| MECHANICAL AND MATERIAL REQUIREMENTS FOR EXTERNALLY THREADED FASTENERS SAE J429 | ||||
| SAE GRADE | CORE HARDNESS | |||
| DESIGNATION | PRODUCTS | NOMINAL SIZE DIA, in | MIN | MAX |
| 1 | BOLTS | 1/4 THRU 1-1/2 | HRB70 | HRB100 |
| 2 | BOLTS, SCREWS | 1/4 THRU 3/4 | HRB80 | HRB100 |
| STUDS | OVER 3/4 TO 1-1/2 | HRB70 | HRB100 | |
| 4 | STUDS | 1/4 THRU 1-1/2 | HRC22 | HRC32 |
| 5 | BOLTS, SCREWS | 1/4 THRU 1 | HRC25 | HRC34 |
| STUDS | OVER 1 TO 1-1/2 | HRC19 | HRC30 | |
| 5.1 | SEMS, BOLTS | No. 6 THRU 5/8 | HRC25 | HRC40 |
| SCREWS | No. 6 THRU 1/2 | HRC25 | HRC40 | |
| 5.2 | BOLTS, SCREWS | 1/4 THRU 1 | HRC26 | HRC36 |
| 7 | BOLTS, SCREWS | 1/4 THRU 1-1/2 | HRC28 | HRC34 |
| 8 | BOLTS, SCREWS, STUDS | 1/4 THRU 1-1/2 | HRC33 | HRC39 |
| 8.1 | STUDS | 1/4 THRU 1-1/2 | HRC32 | HRC38 |
| 8.2 | BOLTS, SCREWS | 1/4 THRU 1 | HRC33 | HRC39 |