S-91775A515 Length 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel coating, extending service life in demanding industrial environments.
• Efficient thread forming eliminates the need for pre-tapped holes, reducing assembly time and labor costs in sheet metal applications.
• Precise 82° countersink angle ensures a flush, professional finish with the oval head, enhancing aesthetics and safety.
• Compatible with No. 44 drill bits for straightforward installation in materials up to 0.025" thickness, streamlining workflow.
• Fully threaded design provides maximum grip and holding power across the entire length for secure fastening.
• Phillips drive and oval head offer a balance of easy installation and a low-profile, tamper-resistant appearance.
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance in global markets.

Professional Applications & Engineering Value

These black-oxide steel Phillips oval head tapping screws are engineered to solve common challenges in sheet metal assembly, such as material fatigue and corrosion. The thread forming design creates strong, durable threads in ductile metals without chips, reducing the risk of loosening under vibration. The black-oxide finish not only resists rust but also minimizes galling, making disassembly easier for maintenance. Ideal for HVAC, electronics enclosures, and automotive panels, these screws ensure reliable performance in industrial fastening applications where precision and durability are critical.

Specification Summary & Compliance

This No. 4-24 x 1/2" tapping screw adheres to standard inch measurements with a thread diameter of 0.112" and approximately 24 threads per inch. It features a right-hand thread direction, fully threaded shank, and is designed for use with a No. 44 drill bit (0.086" diameter). Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it meets stringent environmental and safety standards for industrial use.