S-91855A640 12-28 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability
• Precise thread engagement with Class 2B fit and fine 12-28 UNF threads, ensuring secure fastening and vibration resistance
• Easy installation and removal using standard external hex drive, compatible with common tools for efficient assembly
• Durable cap design with standard profile and 13/32" height, providing full thread protection and a finished appearance
• Compliance with global standards including RoHS 3 and REACH, meeting industrial safety and environmental regulations
• Right-hand thread direction for standard application use, reducing installation errors and improving workflow consistency
• Optimized thread depth of 7/32" for enhanced load distribution and joint integrity in demanding mechanical assemblies

Professional Applications & Engineering Value

This 12-28 UNF fine thread cap nut delivers exceptional performance in industrial settings where corrosion resistance and precise threading are critical. Manufactured from 18-8 stainless steel, it effectively combats rust and chemical exposure in automotive, machinery, and marine applications. The Class 2B thread fit and fine thread spacing provide superior clamping force and vibration dampening, preventing loosening under dynamic loads. With an external hex drive and standard cap nut profile, it enables quick installation while protecting threads from damage and contamination. Ideal for enclosures, shafts, and precision equipment, this nut ensures reliable, long-lasting connections in demanding engineering environments.

Specification Summary & Compliance

This cap nut adheres to UNF thread standards with a Class 2B thread fit for consistent dimensional accuracy. It features a 12-28 fine thread size, 3/8" width, and 13/32" height with a 7/32" thread depth. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety requirements for industrial use.