S-91644A326 Length 4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh industrial environments
• Enhanced sealing and vibration resistance through integrated stainless steel/rubber flat washers that prevent loosening and provide reliable joint integrity
• Optimized thread forming design (A/AB type) creates strong, permanent threads in sheet metal without requiring pre-tapped holes
• Efficient installation with external hex drive and pointed tip for quick alignment and driving with standard 5.5mm drill bits
• Secure fastening in thin materials with maximum 0.025" drilling thickness capability, ideal for sheet metal applications
• Partial threading design provides superior clamping force while minimizing material stress in sheet metal assemblies
• Right-hand threading ensures compatibility with standard installation tools and procedures

Professional Applications & Engineering Value

These No. 14-10 thread forming screws deliver exceptional engineering value for sheet metal applications where reliability is critical. The 18-8 stainless steel composition provides excellent corrosion resistance, making these hex washer screws suitable for demanding environments including outdoor equipment, HVAC systems, and electronic enclosures. The thread forming design eliminates the need for separate tapping operations, reducing installation time and labor costs while creating strong, strip-resistant threads in sheet metal up to 0.025" thickness. The combination of stainless steel/rubber washers creates an effective seal against moisture and prevents vibration-induced loosening, ensuring long-term joint integrity in dynamic applications.

Specification Summary & Compliance

These tapping screws feature inch system measurements with No. 14-10 thread specification (0.242" diameter, 10 threads per inch) and comply with standard A/AB tapping screw classifications. The 4" length with partial threading and external hex drive provides precise installation control. Manufactured from 18-8 stainless steel with complementary stainless steel/rubber flat washers (5/8" OD, 0.101" thickness), these fasteners meet industry standards for material quality and dimensional accuracy. Compatible with standard 5.5mm drill bits for optimal performance in sheet metal applications requiring maximum 0.025" drilling thickness.