hexagon standoff spacer M4-M6 1) Standard: hexagon standoff 2) Nominal size: M2.5-M8 3) Surface: Zinc, Galvanized, Black, Plain, customised 4) Materials: carbon steel or stailess steel 5) Packing: Cartons in a strong pallet. 6) We can produce the Non-standard fasteners according to drawings or the samples More photos for male female screws