S-91745A591 5/16"-18 x 2" Thumb Screws

Key Features & Benefits at a Glance

• Effortless hand-tightening with a wide spade head design requiring no tools for quick adjustments in tight spaces
• Superior corrosion resistance from 18-8 stainless steel construction, ideal for humid or chemical-exposed environments
• Reliable coarse threading (UNC) ensures faster installation and secure holding power in softer materials
• Precise Class 2A thread fit guarantees consistent engagement and reduces cross-threading risks during assembly
• Full-length threading along the 2" shaft provides maximum grip depth and versatile positioning
• Compliance with RoHS 3 and REACH ensures environmental safety and meets international regulatory standards
• Durable right-hand thread design offers standardized operation compatible with common industrial practices

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this 5/16"-18 UNC thumb screw delivers exceptional value in applications requiring frequent access or tool-free operation. The 18-8 stainless steel material resists rust and oxidation, making it suitable for outdoor equipment, electrical enclosures, and machinery panels exposed to moisture. Its spade head offers an ergonomic grip that reduces hand fatigue during repeated tightening, while the coarse thread design prevents stripping in aluminum or plastic housings. Fully threaded along its 2" length, it ensures uniform stress distribution and maintains clamp force in vibration-prone assemblies, providing a reliable fastening solution for maintenance hatches, jigs, and adjustable components.

Specification Summary & Compliance

This thumb screw adheres to Unified National Coarse (UNC) thread standards with a Class 2A tolerance for consistent fit and interchangeability. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances. The right-hand coarse thread (18 TPI) and full threading across the 2" length ensure dimensional accuracy for reliable performance in industrial fastening applications.