规格：M5 ~ M24 ( 10# ~ 1'')
性能等级：
钢: ISO898:4.6 ~ 10.9; ASTM A307, A354, A449, SAE J429 Gr.2 ~ Gr.8
不锈钢: ISO3506: A2(50 ~ 80), A4(50 ~ 80), C1, C3;ASTM 593, F594, F738M