S-91830A562 1/4"-20 x 5/16" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual grip and torque application with a 1" diameter knurled head, reducing tool dependency and speeding up assembly.
• Superior corrosion resistance and durability from 18-8 Stainless Steel construction, ideal for harsh industrial environments.
• High mechanical strength and load-bearing capacity with 80,000 psi tensile strength and Rockwell B83 hardness for reliable performance.
• Quick and secure fastening with UNC coarse thread spacing and Class 2A fit, ensuring consistent engagement and reduced cross-threading risks.
• Full-threaded design for maximum adjustability, allowing precise positioning and holding power along the entire 5/16" length.
• Compliance with strict environmental regulations, meeting RoHS 3 and REACH standards for safe, sustainable use in global markets.
• Raised round head profile for easy access in tight spaces, improving installation and removal efficiency in complex assemblies.

Professional Applications & Engineering Value

This 1/4"-20 knurled thumb screw in 18-8 Stainless Steel addresses common challenges in industrial settings, such as frequent adjustments and exposure to corrosive elements. The knurled head texture provides a non-slip surface, enabling high torque application without specialized tools, which is critical in maintenance-heavy applications like machinery panels, electronic enclosures, and automotive components. The fully threaded UNC coarse spacing with Class 2A fit ensures rapid installation and reliable thread engagement, minimizing assembly time and reducing the risk of stripping. With a raised round-head profile and robust 80,000 psi tensile strength, it offers long-term reliability in vibration-prone environments, supporting efficient B2B operations where durability and regulatory compliance are paramount.

Specification Summary & Compliance

This thumb screw features precise UNC thread specifications with 1/4"-20 coarse spacing and Class 2A thread fit for consistent dimensional accuracy. It adheres to industry standards for right-hand threading and includes a 1" knurled head diameter and 5/16" length for optimal performance. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety requirements for industrial use.