Mechanical Properties Bolt -Grade Identification Markings
| Grade |
Size |
Tensile ksi, min |
Yield, ksi, min |
Elong, %, min |
RA % min |
| B7 |
Up to 2-1/2 |
125 |
105 |
16 |
50 |
| 2-5/8 - 4 |
115 |
95 |
16 |
50 |
| 4-1/8 - 7 |
100 |
75 |
18 |
50 |
| B8 Class 1 |
All |
75 |
30 |
30 |
50 |
| B8M Class 1 |
All |
75 |
30 |
30 |
50 |
| B8 Class 2 |
Up to 3/4 |
125 |
100 |
12 |
35 |
| 2007/8/1 |
115 |
80 |
15 |
35 |
| 1-1/8 - 1-1/4 |
105 |
65 |
20 |
35 |
| 1-3/8 - 1-1/2 |
100 |
50 |
28 |
45 |
| B8M Class 2 |
Up to 3/4 |
110 |
95 |
15 |
45 |
| 2007/8/1 |
100 |
80 |
20 |
45 |
| 1-1/8 - 1-1/4 |
95 |
65 |
25 |
45 |
| 1-3/8 - 1-1/2 |
90 |
50 |
30 |
45 |
| B16 |
Up to 2-1/2 |
125 |
105 |
18 |
50 |
| 2-5/8 - 4 |
110 |
95 |
17 |
45 |
| 4-1/8 - 7 |
100 |
85 |
16 |
45 |
