... a lot experience, which help us to ensure the quality. machine screwMaterials: stainless steelSize: M2-M6Surface: plainStandard: DIN, ANSI, JIS, BSscrew ... form:philips,phil-slot,pozi,hexsocket,six-lobe,square,triangle,slotted.Place of OriginSuzhou China(mainland)Brand NameTeerteMaterialCarbon steel & stainless steelSizeAll ...