S-90380A281 Length 3/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastic materials thanks to the tri-lobe shank design that displaces material for a secure, vibration-resistant fit.
• Reduced risk of material stress and cracking with a thread forming (TRS) action that creates strong threads without cutting and generating chips.
• Efficient installation and consistent torque enabled by the Phillips No. 2 drive, providing a reliable and common interface for power or hand tools.
• Enhanced corrosion resistance for extended service life from the zinc-plated steel construction, ideal for various industrial environments.
• Precise and clean installation with a fully threaded, blunt tip design that guides the screw accurately and prevents damage to the plastic substrate.
• Wide compatibility with standard drill bits, designed for use with a No. 33 drill bit (0.113" diameter) for a proper pilot hole.
• Guaranteed regulatory compliance for global supply chains, meeting RoHS 3 and REACH standards for safe and responsible manufacturing.

Professional Applications & Engineering Value

These zinc-plated steel TRS tapping screws are engineered specifically for plastic fastening applications where reliability is critical. The thread forming design is a key advantage, as it cold-forms mating threads in ductile plastics, eliminating chips and providing a tighter, more vibration-resistant connection than thread-cutting alternatives. The tri-lobe shank cross-section ensures high strip-to-drive torque ratios, maximizing pull-out strength while minimizing the driving force required. This makes them ideal for assembly lines, reducing operator fatigue and preventing over-torquing that can lead to plastic boss failure. Combined with a standard pan head and Phillips drive, they offer a versatile and robust solution for electronics enclosures, automotive trim, and consumer appliance assemblies.

Specification Summary & Compliance

This No. 5 size screw features a 0.125" thread diameter with 20 threads per inch and a 3/8" length, fully threaded. The screw conforms to TRS (Thread Rolling Screw) standards for thread forming fasteners. It is manufactured from steel with a zinc plating finish and is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant.