S-90417A137 Length 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastic materials thanks to the tri-lobe shank design that displaces material without creating chips
• Reduced installation torque and risk of boss cracking with the thread forming (TRS) action, ideal for repeated disassembly and reassembly
• Corrosion-resistant black-oxide steel finish provides durable protection for long-term performance in various environments
• Easy and efficient installation with the Phillips No. 2 drive, ensuring compatibility with common tools and reducing cam-out
• Full threading and blunt tip for maximum engagement and easier starting in pre-drilled pilot holes
• Optimized for use with No. 23 drill bits (0.154" diameter), ensuring precise fit and reliable performance in plastic assemblies
• Compliant with major environmental regulations including RoHS 3 and REACH, making them suitable for global supply chains

Professional Applications & Engineering Value

These No. 8 x 1-1/4" TRS thread forming screws are engineered specifically for plastic assembly applications, where traditional fasteners can cause stress cracking or stripping. The tri-lobe shank cross-section and thread forming (TRS) design cold-form mating threads in ductile plastics, creating zero chips and a tight, vibration-resistant fit. This eliminates the need for tapped holes and reduces assembly time. The black-oxide steel construction offers excellent corrosion resistance, while the Phillips drive and blunt tip facilitate quick alignment and installation. Ideal for electronics enclosures, automotive trim, and consumer products, these screws provide reliable, high-strength fastening in thermoplastics and other non-ferrous materials without compromising material integrity.

Specification Summary & Compliance

This fastener features a No. 8 screw size with a 0.164" thread diameter and 16 threads per inch in a right-hand direction. It has a standard pan head with a 0.322" diameter and 1-1/4" length, and is fully threaded. Manufactured to typical industrial standards for thread forming screws, it is designed for use with a No. 23 drill bit (0.154" diameter). The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to strict environmental and safety regulations for hazardous substances.