S-91644A317 Length 1 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
• Enhanced joint sealing and vibration resistance through integrated stainless steel/rubber flat washers that prevent loosening
• Efficient thread forming technology creates strong, permanent threads in sheet metal without chip removal
• High-torque capability with 3/8" external hex head design for secure installation using standard tools
• Maximum material penetration with fully threaded design and pointed tip for consistent holding power
• Precision thread engagement with 10 TPI and 0.242" diameter ensuring reliable fastening in thin materials
• Optimized for sheet metal applications with specific drill bit sizing for 0.025" maximum drilling thickness

Professional Applications & Engineering Value

These No. 14 hex washer tapping screws deliver exceptional value in sheet metal fabrication and assembly operations. The 18-8 stainless steel construction provides excellent corrosion resistance while the thread forming design (A/AB type) creates strong, clean threads without generating metal chips that could contaminate sensitive equipment. The combination of stainless steel/rubber washers offers dual benefits: the stainless steel distributes load evenly while the rubber component creates a weather-resistant seal and dampens vibrations. With 10 TPI precision threading and fully threaded design, these screws maintain consistent clamping force across the entire 1-1/2" length, making them ideal for HVAC systems, electronic enclosures, and automotive panels where reliability is critical.

Specification Summary & Compliance

This thread forming tapping screw features a No. 14 size with 0.242" thread diameter and 10 threads per inch precision. The A/AB tapping screw type conforms to industry standards for thread forming applications, while the external hex drive with 3/8" head width ensures compatibility with standard installation tools. Manufactured from 18-8 stainless steel with matching stainless steel/rubber washers (5/8" OD, 0.101" thickness), these screws are designed for optimal performance in sheet metal up to 0.025" drilling thickness using 5.5 mm (0.2165") drill bits. The right-hand threaded, fully threaded design provides consistent fastening performance across industrial applications.