... 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 can we ... 8,9.8,10.9,12.9,etcCarbon steelGr.B,Gr.C,Gr.D,Gr.36,Gr.58, ... the cutting/turning parts.;; Adjustable screw for sewing machine