S-91855A650 1 1/4"-7 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life
• Secure, vibration-resistant fastening thanks to coarse UNC thread spacing that maintains grip under dynamic loads
• Precise thread engagement with Class 2B fit ensuring consistent performance and reduced risk of cross-threading
• Easy installation and removal using standard external hex drive, compatible with common wrenches for efficient maintenance
• Enhanced safety and cleanliness from the enclosed cap design that protects threads and prevents contamination
• Full regulatory compliance meeting RoHS 3 and REACH standards for use in regulated industrial applications
• Heavy-duty load capacity with 1 1/4" thread size providing reliable strength for demanding mechanical assemblies

Professional Applications & Engineering Value

This 1 1/4"-7 UNC cap nut delivers exceptional engineering value in industrial settings where corrosion resistance and thread reliability are critical. The 18-8 stainless steel composition provides inherent protection against rust and chemical degradation, making it suitable for marine, chemical processing, and outdoor applications. The coarse thread spacing and Class 2B thread fit ensure rapid assembly while maintaining vibration resistance in heavy machinery, structural frameworks, and transportation equipment. The external hex drive allows for high-torque installation using standard tools, while the capped end protects internal threads from damage and contamination. These features combine to reduce maintenance frequency and prevent thread stripping in high-stress applications.

Specification Summary & Compliance

This cap nut features 1 1/4"-7 UNC coarse threads with Class 2B thread fit per ASME B1.1 standards, ensuring precise dimensional accuracy and interchangeability. The manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances. With right-hand thread direction and standard cap nut profile, this fastener meets industry specifications for inch-measurement applications requiring reliable, corrosion-resistant sealing solutions.