S-94077A205 1/2"-13 x 1 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Ultra-corrosion-resistant coating extends service life in harsh environments, reducing replacement frequency and maintenance costs
• Five-lobe shank design provides superior resistance to loosening under vibration, ensuring reliable long-term fastening
• External hex drive and flanged head enable high-torque installation and eliminate the need for separate washers, speeding up assembly
• Thread forming UNC coarse threads create strong, permanent threads in steel and sheet metal without pre-tapped holes
• Fully threaded 1½" length offers maximum grip range and holding power in various material thicknesses
• RoHS 3 and REACH compliance ensures environmental regulatory adherence for global industrial supply chains
• Precise 15/32" drill bit specification guarantees optimal hole fit for secure thread engagement and reduced installation failures

Professional Applications & Engineering Value

These 1/2"-13 UNC thread forming screws solve critical challenges in steel and sheet metal fabrication where vibration resistance and corrosion protection are paramount. The five-lobe shank cross-section mechanically locks into host materials, preventing back-out in dynamic load conditions that plague conventional fasteners. Combined with the ultra-corrosion-resistant coated steel construction, this design maintains structural integrity in manufacturing facilities, outdoor enclosures, and HVAC systems exposed to moisture and temperature fluctuations. The external hex drive transmits maximum torque without cam-out, while the flanged head distributes clamping force evenly across joined surfaces - eliminating stress concentration points that cause material deformation in thin-gauge applications.

Specification Summary & Compliance

Manufactured to UNC coarse thread standards with Class 2A tolerance for reliable interchangeability. Features right-hand thread direction and fully threaded blunt tip design optimized for thread forming applications in steel substrates. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Requires 15/32" (0.4687") drill bit for proper hole preparation in sheet metal up to 1½" thickness.