| Standard | La norma ASTM A325,ASTM A325M,ASTM A490,ASTM A490M |
| El tamaño | M12-M36,1/2"-1-1/2" |
| El grado | Un325-1,A325M-1,un490-1,A490M-1 |
| Terminar | Negro, la auto-color, H.D.G, YZP, Darcromet |
| Material | 45#, 40CR, 35CrMo,42CrMo |