having multi-cutting edges and chip cavities

7/16-20 x 6 Socket Cap Screw Alloy

The third generation of this patented wall anchor comes with these improvements:

10 x 3 Simpson Bugle-Head Self-Drilling Screw - Square Drive 410 SS - Carton (1500)

tamper resistant applications

12 x 2 1/2 Simpson Flat-Head Self-Drilling Screw w/ Wings - Square Drive 410 SS - Carton (1000) 2-4 1/2 Socket Cap Screws Alloy having multi-cutting edges and chip12 x 2 1 2 Simpson Flat Head Self Drilling Screw w Wings Square Drive 410 SS Carton (1000) . 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