S-91841A155 4-48 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and reducing maintenance costs.
• Precise, secure fastening ensured by the Class 2B thread fit, minimizing the risk of loosening under vibration.
• Excellent for fine-adjustment applications due to the UNF fine thread, providing a tighter seal and improved load distribution.
• Easy installation and removal with the standard external hex drive, compatible with common wrenches for efficient assembly.
• Reliable performance in regulated industries as it is RoHS 3 and REACH compliant, meeting strict environmental and safety standards.
• Durable and long-lasting material properties resist wear and galling, extending the service life of your assemblies.
• Versatile compatibility with right-hand thread and inch system components, making it a standard choice for various industrial equipment.

Professional Applications & Engineering Value

This 4-48 UNF fine thread hex nut is engineered to address critical challenges in precision assemblies where vibration resistance and environmental durability are paramount. The 18-8 Stainless Steel material offers excellent resistance to corrosion and oxidation, making it suitable for applications in electronics, aerospace, and marine equipment that are exposed to moisture or chemicals. The fine thread design provides a higher number of threads per inch, allowing for finer adjustments and a more secure hold in thin materials or where precise clamping force is required. Combined with the Class 2B thread fit, it ensures consistent engagement with mating screws, reducing the risk of cross-threading and thread stripping. This nut is ideal for use in compact assemblies, instrumentation, and machinery that demand reliable, repeatable fastening performance under dynamic loads.

Specification Summary & Compliance

This hex nut features a 4-48 UNF fine thread with a Class 2B thread fit for consistent dimensional accuracy and ease of assembly. It has a standard profile with a 1/4" width and 3/32" height, designed for use in inch-based systems. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial applications requiring environmental responsibility.