We SP Steels Are Leading Suppliers of All Type of Industrial, Machined, Self Tapping Screw, Fasteners Screws in Following Standards & Grades ANSI/ASME B18.2.1 Screws 13/8 inch to 3 inch, BS 1769 ½ inch to 2 inch, ASME B18.2.3.6M M12 to M36, ASME B18.2.3.7M M16 to M36, DIN 6914 M12 to M36, ISO 7412 M12 to M36, UNI 5712 M12 to M36, DIN-EN 14399-4 M12 to M36 & Also We Customize As …