Unique 4-corner thread form with raised-ridge technology greatly reduces driving torque

1-14 x 2 1/2 Socket Cap Screw Alloy

5/16-18 x 8 Socket Cap Screw Alloy

tap bolts) with all dimensions conforming to DIN 933

7 x 1 5/8 Simpson Trim-Head Self-Drilling Siding Screw - Square Drive 410 SS - Carton (1000) 3/4-10 Grade 5 Hex Cap Screws Zinc Plated Unique 4-corner thread form with7 x 1 5 8 Simpson Trim Head Self Drilling Siding Screw Square Drive 410 SS Carton (1000) . 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.)