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 ... etcAlloy steel4130,4140,G51150,etcStainless steel201,202,301,302,303,304,316,310,430,etcBrassC28000,C37710,C3450,C27200, ... the cutting/turning parts.;; Adjustable screw for sewing machine