S-94301A105 4-40 Cap Nuts
Cap Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and outdoor applications.
- Reliable fastening performance ensured by Class 2B thread fit, providing consistent engagement and reducing cross-threading risks.
- Easy installation and removal with external hex drive and 5/16" width, allowing for standard wrench access and efficient assembly.
- Durable open-end design protects threads from damage and contaminants, extending service life in demanding conditions.
- Wide compatibility with 4-40 UNC coarse threads and right-hand direction, suitable for common machinery and equipment assemblies.
- Environmental compliance meeting RoHS 3 and REACH standards, ensuring safe use in regulated industries and global markets.
- Precision engineering with 1/4" thread depth and uniform dimensions, delivering secure, vibration-resistant connections.
Professional Applications & Engineering Value
This 4-40 UNC thread cap nut in 18-8 stainless steel addresses critical needs in industrial fastening by combining corrosion resistance with mechanical reliability. The external hex drive and coarse thread design enable quick, tool-friendly installation in tight spaces, reducing assembly time and labor costs. Its Class 2B thread fit ensures precise alignment and consistent torque transmission, minimizing loosening under vibration—common in automotive, machinery, and electrical enclosures. The open-end cap nut profile shields internal threads from debris and moisture, enhancing durability in outdoor or washdown environments. Ideal for OEM and MRO applications, this nut supports long-term performance in industrial fasteners where material integrity and compliance with RoHS and REACH are paramount.
Specification Summary & Compliance
This cap nut features a 4-40 UNC coarse thread with Class 2B fit for standard dimensional accuracy, a 5/16" width and 1/4" height for uniform installation, and right-hand thread direction. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial components.
