S-90380A274 Length 7/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastic with advanced Tri-Lobe shank design that forms threads without pre-drilling, reducing assembly time and labor costs
• Enhanced corrosion resistance thanks to zinc-plated steel construction, ensuring long-term reliability in various industrial environments
• Optimized for plastic materials with a thread forming (TRS) design that minimizes stress cracking and provides secure, vibration-resistant fastening
• Easy installation with Phillips No. 1 drive offering improved torque transfer and reduced cam-out for efficient, consistent assembly operations
• Full 7/8" threading delivers maximum grip length for stronger connections in plastic components, enhancing overall assembly integrity
• Precision-engineered pan head with standard rounded profile for a low-profile finish and even clamping force distribution
• Compliance with RoHS 3 and REACH standards ensures environmental safety and meets global regulatory requirements for industrial use

Professional Applications & Engineering Value

This No. 4-20 TRS thread forming screw is specifically engineered for plastic fastening applications, where traditional screws may cause material stress or failure. The Tri-Lobe shank cross-section and thread forming design displace plastic material during installation, creating strong, permanent threads without the need for tapping or pre-drilled threads—this eliminates extra steps and reduces the risk of strip-out. Made from zinc-plated steel, it offers durability against corrosion, making it ideal for electronics enclosures, automotive plastic components, and consumer goods assemblies. The Phillips drive ensures straightforward installation with standard tools, while the fully threaded and blunt tip design allows for precise depth control and secure seating in plastic substrates, enhancing productivity and reducing waste in high-volume manufacturing.

Specification Summary & Compliance

This thread forming screw adheres to standard inch measurements with a No. 4-20 thread size (0.112" diameter, 20 threads per inch) and 7/8" length, providing consistent fit and performance. It features a right-hand thread direction and Class 2A thread tolerances for reliable engagement. Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety standards for industrial use, ensuring suitability in global supply chains.