S-98903A250 Length 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 industrial environments
• Efficient thread forming action creates strong, permanent threads in sheet metal without pre-tapping, reducing installation time
• Secure flush mounting with undercut flat head design and 82° countersink angle for smooth surface finishes
• Reliable drive engagement through Phillips No. 2 drive system preventing cam-out during high-torque applications
• Full-length threading ensures maximum grip strength and uniform load distribution across the entire fastener length
• Environmental compliance meets RoHS 3 and REACH standards for safe use in regulated industries
• Optimized for 0.025" maximum drilling thickness in sheet metal applications with precise No. 29 drill bit compatibility

Professional Applications & Engineering Value

These Type A thread forming screws deliver exceptional value in sheet metal fabrication and assembly operations. The 18-8 stainless steel composition provides excellent corrosion resistance, making these Phillips flat head tapping screws ideal for applications exposed to moisture or chemicals. The undercut flat head profile ensures proper seating in countersunk holes without protruding, while the 82° countersink angle matches standard sheet metal preparations. The thread forming tapping method creates stronger threads than cutting alternatives by displacing material rather than removing it, resulting in improved vibration resistance and pull-out strength. These fully threaded No. 8-15 fasteners maintain consistent clamping force across the entire engagement length, critical for maintaining structural integrity in industrial assembly applications where reliability is paramount.

Specification Summary & Compliance

This No. 8-15 x 1/2" tapping screw features precision 0.164" thread diameter with 15 threads per inch in right-hand orientation. The fastener meets Type A thread forming screw standards with Class 2A thread tolerances for consistent performance. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industries. The screw is designed for use with No. 29 drill bits (0.136" diameter) and accommodates maximum drilling thickness of 0.025" in sheet metal applications.