| Grade | Description | Size | Threads | Image |
| SAE Grade 2 | zinc-coated steel with "SBY" markings cost: 19 cents each @ Lowes |
3/8" x 2.5" | 16 per in. | 
|
| SAE Grade 2 | zinc-coated steel with "L" markings cost: 22 cents each @ Lowes |
3/8" x 3" | 16 per in. | 
|
| ASTM A307 | silver-colored steel with "307A OF" markings | 0.75" x 2" | 10 per in. | 
|
| SAE Grade 2 | gray-colored steel with no markings | 0.75" x 1.375" | 10 per in. | 
|
| SAE Grade 5 | gold-colored steel with 3 marks | 0.75" x 1.5" | 10 per in. | 
|
| SAE Grade 8 | steel with hexagonal socket head and no markings | 0.75" x 2.5" | 10 per in. | 
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