S-95893A377 Length 1 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior torque transfer with T15 Torx drive design, reducing cam-out and tool wear during installation
• Excellent thread-forming capability through tri-lobe shank design, creating secure, vibration-resistant threads in plastic materials
• Enhanced corrosion resistance with zinc-plated steel construction, ensuring long-term reliability in various environments
• Optimal plastic fastening performance with 82° countersink angle and blunt tip for clean, flush installations without material cracking
• Full-thread engagement with 16 TPI right-hand threading, providing maximum holding power across the entire fastener length
• Industry compliance assurance meeting RoHS 3 and REACH regulations for safe use in industrial applications
• Precision installation compatibility with No. 23 drill bit (0.154" diameter) for accurate hole preparation in plastic components

Professional Applications & Engineering Value

These No. 8 TRS tapping screws are specifically engineered to address common challenges in plastic fastening applications, where traditional fasteners often cause material stress, cracking, or poor thread retention. The tri-lobe shank design displaces plastic material during installation, creating permanent, high-strength threads without the need for additional inserts or tapping operations. The T15 Torx drive system ensures maximum torque transmission, preventing stripping and enabling consistent installation in high-volume production environments. Combined with zinc-plated steel construction, these screws provide reliable performance in electronics enclosures, automotive plastic components, and industrial equipment where vibration resistance and corrosion protection are critical. The 82° countersink angle and flat head profile allow for flush mounting in plastic assemblies, maintaining aesthetic requirements while ensuring structural integrity.

Specification Summary & Compliance

These thread forming screws feature precision No. 8 thread diameter (0.164") with 16 threads per inch in right-hand direction and Class 2A thread tolerances. The TRS (Thread Rolling Screw) design follows standard thread forming specifications for plastic materials. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance compliance. The 1-1/2" length provides versatile fastening depth options for various plastic thicknesses, while the standard flat head profile maintains consistent installation performance across applications.