Adjustable screw for sewing machine Surface :Plain Machined and turned SGS audited More ... 1,Name: Adjustable screw for sewing machine;adjustable screw;screw for sewing machine 2,For the similar screw,what ... etcAlumimum100,5052,6061,6063,etc(2),Ability for the surface finish: ElectroplateZinc plated(while,colour,dacroment),Nickel plated, ... the cutting/turning parts.;; Adjustable screw for sewing machine