S-91185A515 5/16"-24 x 5/8" Thumb Screws

Key Features & Benefits at a Glance

• Tool-free installation and adjustment with comfortable Acetal plastic knurled head for secure grip and reduced hand fatigue during repeated use
• Superior corrosion resistance provided by 18-8 Stainless Steel construction, ensuring long-term reliability in various industrial environments
• Precise and secure fastening with Class 3A UNF fine threading, offering tighter tolerances and reduced risk of loosening under vibration
• Space-saving low-profile design with round head shape, ideal for applications with limited clearance without compromising on grip surface
• Enhanced durability and chemical resistance from the Acetal plastic head, which operates reliably in temperatures from 32° to 180°F
• Full-length threading for consistent engagement along the entire 5/8" length, providing versatile positioning and strong holding power
• Compliance with environmental and safety standards including RoHS 3 and REACH, ensuring safe use in regulated industries

Professional Applications & Engineering Value

This low-profile thumb screw combines the strength of 18-8 Stainless Steel with the user-friendly design of an Acetal plastic knurled head, addressing common challenges in assembly and maintenance. The Class 3A UNF fine thread ensures precise, vibration-resistant fastening in equipment requiring frequent adjustments, such as electronic enclosures, machinery panels, and optical devices. Its right-hand thread direction and fully threaded body allow for quick installation without tools, reducing downtime in production lines. The knurled texture offers a non-slip surface, even in oily conditions, while the temperature-resistant head maintains integrity in environments ranging from cool to moderately warm. Ideal for industries like manufacturing, aerospace, and telecommunications, this screw provides a reliable, compliant solution that enhances operational efficiency and equipment longevity.

Specification Summary & Compliance

This thumb screw features a 5/16"-24 UNF fine thread with Class 3A fit for high precision and strength. It is fully threaded with a length of 5/8", head diameter of 1", and low-profile round design. Manufactured from 18-8 Stainless Steel with an Acetal plastic head, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and regulatory adherence for industrial use.