... sewing machine Surface :Plain Machined and turned SGS audited More than 20 years experience 1,Name: Adjustable screw for sewing machine ... ;adjustable screw;screw for sewing machine 2,For the similar screw,what ... C60600,C17200,etcAlumimum100,5052,6061,6063,etc(2),Ability for the surface finish: ElectroplateZinc ... parts.;; Adjustable screw for sewing machine