S-91644A321 Length 2 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability
• Enhanced sealing and vibration resistance from the integrated stainless steel/rubber flat washer, preventing loosening and leakage
• High-strength thread forming design creates permanent, secure threads in sheet metal without pre-tapping, reducing installation time
• External hex drive with 3/8" head allows for high torque application and easy installation with standard tools
• Optimized for 0.025" maximum drilling thickness with 5.5mm drill bit compatibility, ensuring precise fit in sheet metal applications
• Fully threaded pointed tip provides faster starting and consistent engagement for reliable fastening performance
• Right-hand A/AB thread standard ensures compatibility with industry equipment and simplifies replacement

Professional Applications & Engineering Value

Engineered specifically for sheet metal applications, these No. 14 tapping screws solve critical industrial fastening challenges. The 18-8 stainless steel construction provides exceptional corrosion resistance, making them suitable for outdoor equipment, HVAC systems, and marine environments where moisture exposure is common. The thread-forming design eliminates the need for separate tapping operations, significantly reducing assembly time and labor costs in high-volume production. The combination of stainless steel and rubber washer creates a reliable seal against dust, moisture, and vibration – crucial for maintaining structural integrity in automotive panels, electrical enclosures, and machinery housings. With their external hex drive and fully threaded pointed tip, these screws deliver maximum clamping force and prevent material distortion during installation in thin-gauge metals.

Specification Summary & Compliance

This thread forming screw features a No. 14 size with 0.242" thread diameter and 10 threads per inch in right-hand direction. The 2-1/2" length with fully threaded design ensures consistent engagement depth. Manufactured to A/AB tapping screw standards with Class 2A thread fit for reliable performance. The 5/8" OD flat washer combines stainless steel and rubber materials for optimal load distribution and sealing. Compliant with RoHS and REACH environmental standards, these screws meet industrial requirements for sheet metal fastening applications requiring 0.025" maximum drilling thickness with 5.5mm drill bit preparation.