Get the best deals for 2 1/2" self tapping screws at . We have a great online selection at the lowest prices with Fast & Free shipping on many items!Govt. Approved Manufacturers & Suppliers Self Tapping Screws as per ASTM, ASME, DIN 7981/ 7982, ISO, EN, BS, JIS Dimensional standards in stainless steel, carbon steel , alloy steel, nickel alloys, brass, copper with ready stock at factory price To buy Self Tapping Screws At best price & urgent delivery please mail to distributors Find Self Drilling Screws at MSC Industrial Supply, serving the metalworking, safety, and MRO industries for over 75 years Self Tapping, Wood & Sheet Metal Screws / Self Drilling Screws Self Drilling Screws Price: $11.51 per 100 Qty. 50 100 150 200 250 300 350 Brighton Best Wood Screw Anchors; Wholesale Distributor for Brighton Best Bolts. Brighton Best Elevator Bolts; Square Hea) Self Tapping Screws or "sheet metal" screws as they're typically called, are normally Type A, Type AB, or Type AB tapping screws used in thin metal or resin-filled plywood.