Adjustable screw for sewing machine Surface :Plain Machined and turned SGS audited ... 1,Name: Adjustable screw for sewing machine;adjustable screw;screw for sewing machine 2,For the similar screw,what can ... 2),Ability for the surface finish: ElectroplateZinc plated(while,colour,dacroment),Nickel plated,copper plated,gold plated,chrome(3 ... the cutting/turning parts.;; Adjustable screw for sewing machine