S-90096A442 5/16"-18 x 1 1/4" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding industrial environments
• Enhanced holding power through serrated locking flange design that prevents loosening under vibration and dynamic loads
• Efficient installation with external hex drive providing maximum torque transfer and reduced installation time
• Reliable thread forming with Type F thread cutting design that creates strong, permanent threads in various materials
• Versatile material compatibility specifically engineered for aluminum, brass, cast iron, and sheet metal applications
• Optimized performance with UNC coarse thread profile ensuring quick engagement and reduced cross-threading risks
• Full-length threading providing consistent holding strength along the entire 1-1/4" length for maximum fastening security

Professional Applications & Engineering Value

This zinc-plated steel flanged tapping screw delivers exceptional engineering value in metal fabrication and assembly operations. The Type F thread cutting design eliminates the need for pre-tapped holes, significantly reducing installation time and labor costs while creating secure, permanent threads in aluminum, brass, cast iron, and sheet metal substrates. The integrated serrated locking flange provides vibration-resistant fastening critical for automotive components, electrical enclosures, and machinery where loosening under dynamic loads poses serious reliability concerns. The external hex drive configuration ensures maximum torque application without cam-out, while the zinc plating offers essential corrosion protection for both indoor and moderate outdoor applications, making it an ideal solution for OEM manufacturing and maintenance operations requiring durable, high-performance fastening.

Specification Summary & Compliance

This 5/16"-18 UNC coarse thread tapping screw maintains precision Class 2A thread tolerances and complies with ASME B18.6.3 specifications SAE J933, ensuring consistent dimensional accuracy and performance reliability. The product features a 1-1/4" fully threaded design with 0.676" flange diameter and requires a 0.281" (K drill bit) pilot hole for optimal performance. Manufacturing and material composition adhere to RoHS 3 (2015/863/EU) compliance standards, guaranteeing environmental responsibility and regulatory acceptance for global industrial applications.