S-91746A908 5/16"-18 x 1" Thumb Screws

Key Features & Benefits at a Glance

• Effortless manual installation and removal with a knurled round head providing superior grip without tools.
• Excellent corrosion resistance thanks to 18-8 Stainless Steel construction, ideal for harsh environments.
• High mechanical strength and durability with a tensile strength of 80,000 psi and Rockwell B83 hardness for reliable performance.
• Secure and precise coarse thread engagement with UNC Class 2A threads ensuring consistent fit and vibration resistance.
• Full-length threading for maximum holding power and versatility across various material thicknesses.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and regulatory acceptance.
• Right-hand thread direction for standard, intuitive tightening and loosening operations.

Professional Applications & Engineering Value

This 5/16"-18 UNC Thumb Screw is engineered to solve critical challenges in industrial assembly and maintenance where tool-free, rapid fastening is essential. The 18-8 Stainless Steel material provides outstanding corrosion resistance, making it suitable for applications in electronics, machinery panels, and outdoor equipment that face moisture or chemicals. The fully threaded design and coarse UNC thread ensure quick installation and strong holding power in a variety of materials, reducing assembly time and improving operational efficiency. The knurled head offers a non-slip surface, enabling secure manual operation even with gloves, which is vital in environments where tools are impractical or access is limited. This combination of durability, user-friendly design, and compliance with RoHS 3 and REACH standards makes it a reliable choice for engineers and procurement specialists seeking high-performance, manual fastening solutions.

Specification Summary & Compliance

This thumb screw features precise UNC coarse threads with a Class 2A thread fit for consistent engagement and tolerance. Key dimensions include a 5/16"-18 thread size, 1" length, and 3/8" head diameter. It is manufactured from 18-8 Stainless Steel and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for industrial use.