
Code of thread: left-handed thread – LH, E.g. FU-5-40LH.
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.