Code of thread: fine-pitch thread – FG, left-handed thread – LH, fine-pitch and left-handed thread-FGLH.

Material and surface treatments:

1) Low carbon steel Q235A; Coated with rust-proof oil, zinc plating or nickel plating.

2) Alternative stainless steel 304, stainless steel 303, stainless steel 316; Surface passivation.

3) Alternative aluminum 6061; Surface cleaning or anodizing finish.

4) Alternative medium carbon steel 45; Coated with rust-proof oil, zinc plating or nickel plating.