S-90096A441 5/16"-18 x 1" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior thread cutting performance in aluminum, brass, cast iron, and sheet metal without pre-tapping, reducing installation time and labor costs.
• Enhanced corrosion resistance with zinc-plated steel construction, ensuring long-term durability in demanding industrial environments.
• Secure anti-loosening lock provided by serrations under the flange, maintaining joint integrity under vibration and dynamic loads.
• High-torque installation capability with the external hex drive and flanged design, allowing for faster assembly and improved clamp load distribution.
• Reliable coarse UNC threading (5/16"-18) for quick engagement and strong holding power in various base materials.
• Full threading with blunt tip ensures consistent grip along the entire length, maximizing pull-out strength in thin-section applications.
• Industry-standard compliance with ASME B18.6.3 and RoHS 3, guaranteeing consistent quality and material safety for global supply chains.

Professional Applications & Engineering Value

This Type F thread cutting screw is engineered to solve common fastening challenges in metal fabrication and assembly. The zinc-plated steel material provides excellent resistance to rust, making it ideal for aluminum, brass, cast iron, and sheet metal applications where exposure to moisture or harsh conditions is a concern. The flanged design with serrations eliminates the need for separate washers and prevents rotation, reducing component count and assembly time. With its coarse UNC thread and thread cutting capability, it forms precise mating threads in ductile metals, ensuring high clamp force and vibration resistance. This makes it a reliable choice for heavy-duty industrial fastening in automotive, machinery, and structural enclosures, where joint integrity is critical.

Specification Summary & Compliance

This 5/16"-18 UNC screw features a 1" length, external hex drive, and fully threaded shank with blunt tip. It meets ASME B18.6.3 specifications (referencing SAE J933) for dimensional accuracy and performance, ensuring interchangeability and reliability. The product is RoHS 3 (2015/863/EU) Compliant, confirming it is free from hazardous substances, and is designed for use with a K drill bit (0.281" diameter) for optimal thread formation.