S-91746A788 5/16"-18 x 1 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for humid or demanding industrial environments.
• Effortless hand-tightening and loosening thanks to the knurled round head design, eliminating the need for tools in quick-adjustment scenarios.
• High mechanical strength and durability with an 80,000 psi tensile strength and Rockwell B83 hardness, ensuring reliable performance under load.
• Secure and precise coarse thread engagement with 5/16"-18 UNC Class 2A threads, providing a robust hold and resistance to vibration loosening.
• Versatile application fit due to the partially threaded shank, allowing for controlled clamping pressure and precise positioning.
• Low-profile, space-saving design of the round head enables use in confined areas where clearance is limited.
• Guaranteed environmental and safety compliance by meeting RoHS 3 and REACH standards, ensuring safe use in regulated industries.

Professional Applications & Engineering Value

This 18-8 Stainless Steel Thumb Screw is engineered to solve common industrial challenges where tool-less operation, corrosion resistance, and reliable fastening are critical. The knurled round head provides an exceptional grip, even with greasy hands or when wearing gloves, significantly reducing installation time in assembly lines, machinery panels, and electronic enclosures. Its coarse UNC threading ensures quick engagement and high resistance to vibration, making it ideal for applications in automotive, manufacturing, and outdoor equipment. The partial threading allows for precise stop positioning, preventing over-tightening and protecting sensitive components. Constructed from durable stainless steel, it withstands harsh conditions without rusting, offering long-term value and reducing maintenance costs in industrial thumb screw applications.

Specification Summary & Compliance

This thumb screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent, reliable engagement. Manufacturing and material specifications ensure dimensional accuracy, including a thread size of 5/16"-18, a length of 1 3/4", and a low-profile round head. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for use in various global markets.