Code of thread: left-handed thread – LH, E.g. FC5-5LH.

Material and surface treatments:

1) Medium carbon steel 45；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 alloy steel 35CrMo; Coated with rust-proof oil, zinc plating or nickel plating.