M12*1（*1.25) 45。    1/4-19BSP           1/2-20SAE           1/4-20SAE

Material:

Y15pb(12L14) Describe: Describttion Y15pb(GB/T 8731--1988) ω/％ chemical composition: Mode  C Si Mn Ti Cr P S pb Y15pb 0.10-0.18 ≤0.15 0.80-1.20     0.05-0.10 0.23-0.33 0.15-0.35