Bolt Grade Strength
| Grade | Dia(in) | Coarse(lbs) | Fine(lbs) |
| 2 | 1/4 5/16 7/16 1/2 9/16 5/8 3/4 |
2350 3900 7850 10500 13500 16700 24700 |
2700 4300 8800 11800 15000 18900 27600 |
| 5 | 1/4 5/16 7/16 1/2 9/16 5/8 3/4 |
3800 6300 12800 17000 21800 27100 40100 |
4350 6950 14400 19200 24400 30700 44800 |
| 8 | 1/4 5/16 7/16 1/2 9/16 5/8 3/4 |
4750 7850 15900 21300 27300 33900 50100 |
5450 8700 17800 24000 30400 38400 56000 |
| Dia.(in.) | Grade 2 | Grade 5 | Grade 8 | Grade 9 |
| 1/4C 1/4F 5/16C 5/16F 7/16C 7/16F 1/2C 1/2F 9/16C 9/16F 5/8C 5/8F 3/4C 3/4F |
5.5 6.3 11 12 32 36 50 55 70 80 100 110 175 200 |
8 10 17 19 50 55 75 85 110 120 150 170 260 300 |
12 14 24 27 70 80 110 120 150 170 210 240 380 420 |
11 13 21 23 60 65 95 105 140 150 185 205 290 355 |
Info compiled by: Gil Meacham
Graciously provided by Joe Schaeffer