F436 flat washers are manufactured from carbon steel to meet or exceed ASTM F436

1 1/2-12 x 7 Socket Cap Screw Alloy

3/4-10 x 11 A307 Grade A Carriage Bolt HDG

Holding power: Pull-out values of Marine screws exceed those of ordinary tapping screws in fiberglass and wood

1/2 x 1 3/4 (1/4 Drive) Magnetic Nut Setter

#33 x 6 High Speed Aircraft Bit Cobalt (6) 5/8-11 Socket Cap Screws 18-8 Stainless Steel F436 flat washers are manufactured#33 x 6 High Speed Aircraft Bit Cobalt . Manufactured to NAS 907 Type J specifications Jobber flute lengths for drilling holes in hard to reach places 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