S-92427A537 1/4"-20 x 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Effortless hand-tightening with a comfortable spade head design, eliminating the need for tools in quick-adjustment scenarios
• Superior corrosion resistance due to high-quality brass construction, ideal for humid or demanding industrial environments
• Reliable thread engagement with a Class 2A UNC coarse thread fit, ensuring smooth installation and secure fastening
• Exceptional mechanical strength from 50,000 psi tensile strength and Rockwell B40 hardness, providing long-term durability under load
• Full-length threading for maximum grip and holding power along the entire 1/2" length, enhancing assembly security
• Compliance with strict environmental regulations including RoHS 3 and REACH, making it safe for global markets and sensitive applications
• Right-hand thread direction for intuitive, standard installation that aligns with common assembly practices

Professional Applications & Engineering Value

This 1/4"-20 brass thumb screw is engineered to solve common industrial challenges where tool-free, rapid adjustments are critical. The spade head offers an ergonomic grip, reducing operator fatigue in high-frequency maintenance or assembly tasks. Made from durable brass, it resists corrosion and galvanic reactions, making it suitable for electrical enclosures, marine equipment, and plumbing systems. The UNC coarse thread and Class 2A fit provide quick, reliable fastening without cross-threading risks, while the fully threaded design ensures consistent clamping force. Ideal for applications requiring frequent disassembly, such as panel covers, jigs, and prototypes, this screw enhances productivity and reduces downtime in industrial fastening environments.

Specification Summary & Compliance

This thumb screw adheres to precise dimensional standards, including a 1/4"-20 UNC thread with Class 2A fit and coarse thread spacing for reliable performance. Manufactured to meet Rockwell B40 hardness and 50,000 psi tensile strength specifications, it ensures consistent quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries and environmentally conscious projects.