Size: M2.5--M36
Inside diameter: M1.6,M2,M2.5,M3,M4,M5,M6,M8,M10,M12,M14,M16,M20,M24,M30,M36
Outside diameter : M4,M5,M6,M7,M9,M10,M12,M16,M20,M24,M28,M30,M37,M44,M56
Thickness : 0.3,0.5,0.8,1,1.6,2.5,3,4,5
Material: Stainless steel 304 , carbon steel 4.8,8.8 grade.
Surface: Plain, black anodized,zinc-plated,HDG,passivated, etc
Standard: GB, DIN, ISO, ANSI/ASTM, B7, BS, BSW, JIS