S-91746A892 1/4"-20 x 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Superior Grip and Easy Handling: Knurled head texture ensures secure, non-slip manual tightening without tools, reducing installation time and improving operator safety.
• Exceptional Corrosion Resistance: Made from 18-8 Stainless Steel, offering reliable performance in humid or corrosive environments, extending service life.
• High Tensile Strength for Demanding Applications: Withstands up to 80,000 psi tensile stress, providing secure fastening in high-vibration or load-bearing assemblies.
• Precision Thread Fit for Consistent Engagement: UNC coarse thread with Class 2A fit ensures smooth, accurate installation and reduces cross-threading risks.
• Compact and Space-Efficient Design: Narrow round-head profile allows use in confined spaces, ideal for electronics, panels, and machinery with limited clearance.
• Fully Threaded Shank for Maximum Holding Power: Ensures uniform load distribution along the entire length, enhancing joint integrity in repetitive adjustments.
• Compliant with Global Environmental Standards: Meets RoHS 3 and REACH regulations, ensuring safety and sustainability for international industrial markets.

Professional Applications & Engineering Value

Engineered for hand-tightened applications where tool access is limited, this 18-8 Stainless Steel Thumb Screw solves common industrial challenges like frequent adjustments and corrosion-induced failures. The knurled head provides a firm grip even with oily gloves, reducing slippage in assembly lines. Its UNC coarse threading and Class 2A fit enable quick, reliable engagement in metals and plastics, minimizing thread wear. Ideal for electronic enclosures, machinery panels, and instrumentation, the screw’s narrow profile and corrosion-resistant properties ensure durability in harsh conditions, while the fully threaded design supports consistent clamping force. This makes it a go-to for maintenance-heavy sectors, enhancing operational efficiency and reducing downtime.

Specification Summary & Compliance

This thumb screw features a 1/4"-20 UNC coarse thread with Class 2A dimensional accuracy for precise fit, and is fully threaded over a 1/2" length. Manufactured from 18-8 Stainless Steel with a hardness of Rockwell B85, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and regulatory adherence for industrial use.