S-90420A766 1/4"-20 x 3" Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with galvanic barrier coated 18-8 stainless steel construction, ideal for harsh environments
• Effortless installation thanks to the No. 3 drill tip and thread forming design that eliminates the need for pre-drilling in many materials
• Secure, flush-mount fastening achieved with the undercut flat head profile, preventing surface protrusion
• High pull-out strength in sheet metal and wood applications due to the coarse 1/4"-20 UNC thread
• Reliable drive engagement and reduced cam-out with the Phillips No. 3 drive style
• Optimized grip and holding power from the partially threaded shank design
• Long-term durability and material integrity from the high-quality 18-8 stainless steel base

Professional Applications & Engineering Value

Engineered for demanding sheet metal and wood applications, these thread forming screws provide exceptional value by solving common installation and longevity challenges. The galvanic barrier coated 18-8 stainless steel construction offers outstanding corrosion resistance, making these Phillips flat head screws suitable for both indoor and outdoor projects where moisture or chemical exposure is a concern. The undercut flat head design ensures a clean, flush finish, while the No. 3 drill tip and thread forming action allow for faster installation without pre-tapping, reducing labor time and tool wear. The coarse UNC thread and partially threaded design maximize holding power in softer materials, preventing material splitting and ensuring a secure, vibration-resistant connection that maintains integrity over time.

Specification Summary & Compliance

This 1/4"-20 UNC thread screw features a right-hand thread direction and coarse thread spacing compliant with standard inch measurement systems. The thread forming tapping method and partial threading ensure precise engagement. Manufactured from 18-8 stainless steel with a galvanic barrier coating, these screws are designed to meet industry standards for dimensional accuracy and performance in wood and sheet metal applications. They conform to relevant material and safety specifications, including RoHS and REACH compliance for environmental safety.