Tapping screw threads

8 x 1 1/4 Simpson Mod Truss-Head Wire Lath Screws - Phillips Drive 305 SS - Carton (1000)

5/8-11 x 5 3/4 Hex Cap Screw SS 18-8 (A2)

3/4-10 x 3 1/2 Hex Cap Screw SS 18-8 (A2)

8 x 2 Simpson Bugle-Head Self-Drilling Screw - Square Drive 410 SS - Carton (2500)

3/8 x 12 High Speed Aircraft Bit Cobalt (3) Nylon Insert Locknuts Zinc Plated Tapping screw threads3 8 x 12 High Speed Aircraft Bit Cobalt . Manufactured to NAS 907 Type J specifications Heavy duty construction for portable or machine drilling For use in drilling in high tensile strength alloy steels, stainless steels, titanium and other difficult to machine materials Made in the USA