S-90055A106 Length 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc-plated steel construction, ensuring long-term reliability in demanding industrial environments
• Superior thread-forming performance with Type B design, creating strong, permanent threads in sheet metal without pre-tapping
• Optimized flush installation featuring an undercut flat head with 82° countersink angle for clean, professional finishes
• Maximum driving efficiency through Phillips No. 1 drive system, reducing cam-out and improving installation speed
• Full-length threading provides consistent holding power along the entire 1/4" length for secure sheet metal assemblies
• Precision compatibility with No. 44 drill bits (0.086" diameter) ensures proper fit and reduces installation errors
• Environmental compliance meeting RoHS 3 standards for safe, sustainable manufacturing practices

Professional Applications & Engineering Value

These Type B thread forming screws are engineered specifically for sheet metal applications where traditional fastening methods fall short. The zinc-plated steel construction provides essential corrosion protection while maintaining the strength required for industrial environments. The undercut flat head design with 82° countersink angle ensures flush mounting without protrusion, preventing snagging and maintaining aerodynamic surfaces. The thread forming technology eliminates the need for separate tapping operations, reducing assembly time and labor costs while creating stronger thread engagement through material displacement rather than removal. These fully threaded screws distribute clamping force evenly, preventing loosening from vibration and thermal cycling common in sheet metal assemblies for HVAC, electronic enclosures, and automotive components.

Specification Summary & Compliance

This No. 4-24 x 1/4" tapping screw features right-hand threads with 24 threads per inch and Class 2A thread tolerances. The Type B thread forming design follows industry standards for sheet metal fastening applications. Manufacturing complies with RoHS 3 (2015/863/EU) environmental regulations, ensuring restriction of hazardous substances. The screw is designed for use with No. 44 drill bits (0.086" diameter) and features a blunt tip with round shank cross-section for optimal performance in thread forming applications.