S-95150A147 2-56 Thumb Nuts

Key Features & Benefits at a Glance

• Enhanced manual grip and torque application with a knurled round head design, reducing tool dependency in quick assembly/disassembly scenarios
• Superior corrosion resistance provided by Black-Oxide coated 18-8 Stainless Steel, ensuring longevity in humid or chemically aggressive environments
• Increased load distribution and vibration resistance due to the integrated flange, minimizing surface damage and loosening under dynamic loads
• Wide compatibility and easy engagement with UNC coarse threading (2-56 size) and Class 2B thread fit, facilitating quick installation and reducing cross-threading risks
• Full threading along the 1/4" height allows for adjustable positioning and secure fastening across varying material thicknesses
• Compliance with stringent environmental regulations including REACH and RoHS 3, making it suitable for global supply chains and eco-conscious industries
• Right-hand thread direction ensures intuitive installation for standard assembly processes, improving workflow efficiency

Professional Applications & Engineering Value

This 2-56 UNC thumb nut is engineered to address common challenges in industrial maintenance, electronics enclosures, and machinery adjustment points where frequent manual access is required. The Black-Oxide 18-8 Stainless Steel construction offers excellent resistance to oxidation and chemical exposure, critical in outdoor, marine, or manufacturing settings. The flanged design distributes clamping force over a wider area (3/16" collar diameter), protecting sensitive surfaces from indentation while enhancing stability against vibrations. Combined with the coarse UNC threads and fully threaded body, it ensures rapid, tool-free fastening even in confined spaces, reducing assembly time and minimizing the risk of strip-out in soft materials or pre-tapped holes.

Specification Summary & Compliance

This thumb nut adheres to Unified Coarse (UNC) thread standards with a Class 2B thread fit for consistent engagement and dimensional accuracy. Key dimensions include a 1/4" head diameter, 3/16" collar diameter, and 1/4" total height. The product is manufactured in compliance with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) directives, ensuring it is free of restricted hazardous substances for use in electronic, automotive, and industrial equipment applications.