S-91746A904 5/16"-18 x 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Effortless hand-tightening and removal with a 3/8" diameter knurled round head for superior grip, even with gloves or oily hands.
• Exceptional corrosion resistance provided by 18-8 Stainless Steel, ensuring long-term reliability in demanding environments.
• High mechanical strength and durability with an 80,000 psi tensile strength and Rockwell B83 hardness to withstand significant loads and repeated use.
• Quick and easy coarse thread engagement thanks to the 5/16"-18 UNC thread, reducing installation time in assembly and maintenance tasks.
• Precise and reliable thread fit with Class 2A tolerance, ensuring consistent performance and reducing the risk of cross-threading.
• Versatile, space-saving design featuring a fully threaded narrow profile for applications with limited clearance.
• Compliant with major environmental regulations including RoHS 3 and REACH, making it suitable for global industrial supply chains.

Professional Applications & Engineering Value

This 5/16"-18 UNC Knurled Thumb Screw is engineered to solve common industrial challenges where tool-free, frequent adjustments are necessary. The 18-8 Stainless Steel construction provides excellent resistance to rust and corrosion, making it ideal for use in machinery, electronic enclosures, and outdoor equipment. The coarse UNC threading and Class 2A thread fit allow for rapid assembly and disassembly, reducing labor time in maintenance and production lines. The knurled head offers a secure grip, preventing slippage and enhancing operator safety. Its 80,000 psi tensile strength ensures it can handle high-stress applications without failure, providing long-term value and reducing replacement costs.

Specification Summary & Compliance

This thumb screw adheres to UNC coarse thread standards with a Class 2A thread fit for precise dimensional accuracy. Key specifications include a 5/16"-18 thread size, 1/2" length, and a fully threaded narrow profile round head. It is manufactured from 18-8 Stainless Steel with a hardness of Rockwell B83 and a tensile strength of 80,000 psi. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.