Tapping screw threads

1/2-13 Drop-In Anchor Zinc Plated (50)

25/32 x 6 Reduced Shank Drill Bit Cobalt (1/2 Shank)

which means you can use them when you work in the same wall without them coming loose

50 x 360 Socket Cap Screw 12

3/8-24 L9 Hex Nut Alloy Cadmium Yellow and Wax Coated Domestic USA (3000) M24-3.00 Socket Set Screws Cup Point DIN 916 Black Oxide Tapping screw threads3 8 24 L9 Hex Nut Alloy Cadmium Yellow and Wax Coated Domestic USA (3000) . L9 High Tensile Strength Hex Nuts are designed for use in high stress, severe service environments. The highest mechanical strength off the shelf fastening system available, its special features control torque tension characteristics to develop high clamp loads when using properly controlled tightening methods. Brighton Best manufactures L9 nuts from AISI alloy steels. L9