S-91644A825 Length 1" Tapping Screws

Key Features & Benefits at a Glance

• Vibration-resistant sealing with integrated stainless steel/rubber washers that prevent loosening under dynamic loads
• Superior corrosion resistance from 18-8 stainless steel construction for long-term reliability in harsh environments
• High-efficiency installation through thread-forming design that creates strong mating threads without pre-tapping
• Secure torque transmission with external hex drive and 3/8" head width for reliable fastening control
• Optimized sheet metal penetration with pointed tip and fully threaded 1" length for maximum grip in 0.025" materials
• Precision compatibility with standard 1/4" drill bits and 10 TPI thread pitch for consistent performance
• Dual-material washer performance combining stainless steel durability with rubber compression for perfect sealing

Professional Applications & Engineering Value

These thread forming tapping screws deliver exceptional value in sheet metal assembly applications where vibration resistance and corrosion protection are critical. The 18-8 stainless steel construction ensures longevity in demanding environments, while the A/AB tapping screw type with thread forming capability eliminates the need for separate tapping operations, reducing installation time and costs. The integrated stainless steel/rubber washer provides dual functionality - the stainless steel distributes load evenly while the rubber component creates a vibration-dampening seal that maintains clamp force under dynamic conditions. The fully threaded design with pointed tip ensures maximum thread engagement in thin sheet metal applications up to 0.025" thickness, making these hex washer screws ideal for HVAC systems, electrical enclosures, and industrial equipment where reliable fastening is paramount.

Specification Summary & Compliance

These No. 17 tapping screws feature precision 10 TPI threads with 0.281" thread diameter and right hand threading conforming to standard tapping screw specifications. The external hex drive with 3/8" head width and 0.181" head height provides secure tool engagement, while the flat washer configuration with 5/8" OD and 0.101" thickness ensures proper load distribution. Manufactured from 18-8 stainless steel with compliance to industry standards for thread forming screws, these fasteners are suitable for applications requiring reliable performance in sheet metal assemblies using 1/4" drill bits.