S-90055A309 Length 3/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• Exceptional holding power in sheet metal due to thread forming Type B design that displaces material without chip removal
• Flush installation with undercut flat head and 82° countersink angle for smooth surfaces and reduced snagging risks
• Efficient installation with Phillips No. 2 drive that provides reliable torque transfer and reduces cam-out incidents
• Full threading engagement along the entire 3/8" length ensures maximum grip strength in thin materials
• Precision compatibility with No. 21 drill bits (0.159" diameter) for optimal thread formation and reduced installation effort
• Environmental compliance with RoHS 3 standards, ensuring safe usage in regulated industries and applications

Professional Applications & Engineering Value

These zinc-plated steel tapping screws are engineered specifically for sheet metal applications where vibration resistance and permanent fastening are critical. The thread forming Type B technology creates strong, permanent threads in ductile materials without generating chips, eliminating contamination risks in electrical enclosures, HVAC systems, and automotive panels. The undercut flat head design with 82° countersink allows for completely flush mounting, preventing interference in tight spaces while the Phillips drive ensures widespread tool compatibility across maintenance teams. With full threading and precise 16 threads per inch pitch, these screws distribute clamping force evenly, preventing material distortion in thin-gauge metals where stress concentration can lead to failure.

Specification Summary & Compliance

This No. 10-16 x 3/8" tapping screw features Unified thread standards with precise dimensional control, including 0.19" thread diameter and consistent 16 TPI spacing for reliable engagement. The manufacturing process adheres to industry standards for thread forming screws, with the flat head profile designed for standard 82° countersunk applications. Compliance with RoHS 3 (2015/863/EU) ensures environmental safety, while the zinc-plated finish provides consistent corrosion protection meeting industrial fastener requirements for sheet metal fastening applications.