The thread parts made of steel and stainless steel are standardized.
The grip and screw are integrally-molded by insert. This enhances the thread part durability.
Screw type (male / female) and thread part material can be selected by a product code. GTM----Male screw / made of steel GTMS----Male screw / made of stainless steel GTF----Female screw / made of steel GTFS----Female screw / made of stainless steel