S-91833A105 5-40 Thumb Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and reducing maintenance costs.
• Excellent hand-tightening grip provided by the knurled round head, allowing for quick assembly and disassembly without tools.
• Reliable and precise thread engagement ensured by the Class 2B thread fit, minimizing cross-threading and ensuring consistent performance.
• Robust coarse UNC threading (5-40) offers faster installation and higher resistance to vibration loosening in industrial settings.
• Fully threaded design maximizes contact area for a stronger, more secure hold in demanding applications.
• Compliance with major environmental regulations including REACH and RoHS 3, ensuring safety and suitability for global markets.
• Durable and long-lasting performance due to the high-quality stainless steel material and standard thumb nut profile.

Professional Applications & Engineering Value

This 5-40 UNC thumb nut is engineered to solve common industrial challenges such as frequent adjustments and exposure to corrosive elements. The 18-8 Stainless Steel material provides exceptional resistance to rust and oxidation, making it perfect for use in machinery, electrical enclosures, and outdoor equipment where durability is critical. The fully threaded and coarse thread design ensures quick, secure fastening, reducing assembly time and improving operational efficiency. The knurled round head offers a non-slip surface, enabling reliable hand-tightening in tight spaces or when tools are impractical. This combination of features delivers high engineering value by enhancing reliability, reducing downtime, and meeting strict industry standards for safety and performance.

Specification Summary & Compliance

This thumb nut features precision Class 2B thread fit with 5-40 UNC coarse threading and right-hand direction, ensuring accurate and reliable fastening. The dimensions include a 1/4" collar diameter, 1/2" head diameter, and 3/8" height for consistent performance. It is manufactured in compliance with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) standards, confirming its adherence to environmental and safety regulations for industrial components.