S-92001A331 5/16"-24 Thumb Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for extended service life in demanding environments
• Effortless manual installation and removal thanks to the wing-style head design requiring no tools
• Reliable, vibration-resistant connections ensured by the fine UNF thread and precise Class 2B thread fit
• Secure, non-slip grip during hand-tightening provided by the generous 1 1/4" width
• Broad compatibility with standard 5/16"-24 UNF male threads for versatile application use
• Compliance with stringent environmental regulations including RoHS 3 and REACH for global market acceptance
• Durable, long-lasting performance from a material known for its excellent strength and durability

Professional Applications & Engineering Value

This 18-8 stainless steel thumb nut is engineered to solve critical challenges in industrial maintenance, machinery, and equipment assembly. The wing-style profile allows for rapid manual fastening in tight spaces where tool access is limited, significantly reducing assembly and disassembly time. The fine UNF threading and Class 2B thread fit provide a superior, vibration-resistant seal compared to coarse threads, making it ideal for applications subject to dynamic loads or thermal cycling. Its corrosion-resistant properties ensure reliability in humid, chemical, or outdoor environments, preventing thread seizure and maintaining performance over countless cycles. This combination of easy manual operation and robust stainless steel construction delivers exceptional value for prototyping, frequent-adjustment fixtures, and permanent installations alike.

Specification Summary & Compliance

This thumb nut features a 5/16"-24 UNF thread with a right-hand direction and fine thread spacing. The internal threads are manufactured to Class 2B tolerance, ensuring consistent fit and performance with standard Class 2A external threads. Key dimensions include a 35/64" base diameter, 1 1/4" width, and 5/8" height. The component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of restricted hazardous substances and suitable for use in regulated markets.