8-18 x 3 1/2 Square Drive Flat Trim Head Self Drilling Screw Full Thread Zinc D985A4 The bolt is made of

The bolt is made of steel for strength and durability and meets ASTM A307 specifications

This 1/4-20 x 3 Unslotted Indented Hex Washer Head Machine Screw is a fully threaded screw with a black oxide finish

The 1/4-14 x 1 1/4 Phillips Flat Undercut Full Thread Self Drilling Screw is a versatile and durable fastener designed for a wide range of applications

while the JISB 1111 Class 4

These 2-56 x 1 1/8 Slotted Pan Machine Screws are made of durable nylon and are fully threaded for maximum holding power

8-18 x 3 1/2 Square Drive Flat Trim Head Self Drilling Screw Full Thread Zinc D985A4 The bolt is made ofThese 8 18 x 3 1 2" Square Drive Flat Trim Head Self Drilling Screws are designed for use in a variety of applications, including metal to wood, wood to wood, and metal to metal. They feature a square drive head for easy installation, a flat trim head for a clean finish, and a self drilling tip that eliminates the need for pre drilling. The full thread design provides maximum holding power, and the zinc coating offers excellent corrosion resistance.