A tapping screw with an integrally formed hex washer head and assembled with 9/16 (5/8 for #14) outside diameter bonded NEO-EPDM washer to create a leak proof seal, spaced or unified threads, and a #2 or #3 drill point. Designed to drill through steel. 410 Stainless steel to drill through harder material and provide the corrosion resistance. Rockwell C50-56. Meets F.I.P.-1000.7 for torsional strength & drill speed. Meets F.I.P.-1000.7 for torsional strength & drill speed. Manufactured to SAE J78 for dimensional specifications

These hex drive self drilling screws in 410 stainless steel are used for a variety of applications including attaching materials to metal up to 12 gauge in thickness. 410 stainless provides both corrosion resistance and the hardness required for drilling through steel.

These flat head self drilling screws in 410 stainless steel are used for a variety of applications including attaching materials to metal up to 12 gauge in thickness. 410 stainless provides both corrosion resistance and the hardness required for drilling through steel.

These pan head self drilling screws in 410 stainless steel are used for a variety of applications including attaching materials to metal up to 12 gauge in thickness. 410 stainless provides both corrosion resistance and the hardness required for drilling through steel.

Fasten fiber cement through furring strips to steel studs. #2 square drive wafer head, #3 drill point. Self-countersinking nibs under head insure seating of screw head flush with work surface. Threaded to within 5/16 " of top of head. Drilling thickness capacity: up to 0.142" (118 mils or 10 ga .).

Attach wood siding, wood panels and metal trim to steel studs. #1 square drive trim head, .230" head diameter, #3 drill point. Threaded 2/3; of overall length. Drilling thickness capacity: up to 0.125" (111 mils or 11 ga.).

Fastens corrugated siding panels to steel stud without pre-drilling. #3 drill point for quick penetration of aluminum panels without “point walking”. Securely fastens one to three panel thicknesses. #2 Phillips drive. Drilling thickness capacity: up to 0.142" (118 mils or 10 ga.)

#3 drill point for quick penetration of metal up to 0.142" or 10 ga. material thickness. 10 x 1 screw with a #2 square drive. Low profile head. Ideal for securing clips used in standing seam roofing.

Fasten wood, plywood and OSB panels to steel studs. #2 square-drive bugle heads drive flush with work surface. Tapping screw threads, #3 drill points. Drilling thickness capacities: up to .083" (68 mils, 14 ga.) for #6, up to .142" (118 mils, 10 ga) for #8 and up to .177" for #10.

Fasten wood, plywood and fiber cement to heavier steel – up to .209" thick. #3 square drive. Machine screw thread, threaded full length. 2 1/2 " length for 2 x 4 wood header; 2" length for 1" and 3/4 " boards. Flat countersunk head with self-countersinking nibs. Shank slot enhances thread formation in steel and removes exhaust. Wings above drill point provide clearance hole in work piece so it won’t climb up the shank, then break off as point engages the steel substrate. Drilling thickness capacities: up to .209" (171 mils, 7 ga) for #12, up to .250" (229 mils, 3 ga) for #14.

Stainless steel self drillers for the most demanding projects, features the drilling capabilities of 410 stainless steel with increased corrosion resistance. Will withstand over 300 hours of salt spray with no oxidation. Rockwell C-53 typical hardness. Magnetic heat treated and passivated chrome/moly alloy. Indented hex head, tapping screw thread, #3 drill point