S-91745A537 1/4"-20 x 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for demanding industrial environments
• Effortless hand-tightening thanks to the spade-shaped thumb head design requiring no tools
• Reliable coarse thread engagement with UNC 1/4"-20 specification for quick installation and secure fastening
• Precision thread fit meeting Class 2A standards ensuring consistent performance and easy assembly
• Maximum thread contact from the fully threaded design providing enhanced grip and load distribution
• Compliance with environmental regulations including RoHS 3 and REACH for safe, sustainable use
• Durable right-hand threading offering standardized operation compatible with common industrial applications

Professional Applications & Engineering Value

This 1/4-20 UNC spade thumb screw delivers exceptional value in applications requiring frequent adjustments or tool-free operation. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it suitable for harsh conditions in manufacturing, electronics, and outdoor equipment. Its coarse thread design allows for rapid installation and reduced cross-threading risks, while the spade head ensures comfortable, high-torque hand tightening. Engineers benefit from the fully threaded construction, which maximizes holding power in assemblies where vibration resistance is critical. This combination of features solves common pain points like maintenance downtime and tool dependency in industrial fastening scenarios.

Specification Summary & Compliance

This thumb screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy and easy assembly. It is manufactured from 18-8 stainless steel and includes a fully threaded, right-hand thread design. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for industrial use.