S-97135A449 1 3/4"-5 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking mechanism that maintains secure fastening under dynamic loads
• High-temperature performance with nylon insert rated for continuous operation up to 220°F (104°C)
• Exceptional strength and durability from Grade 8 steel construction for heavy-duty industrial applications
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance and easy assembly
• Enhanced corrosion protection through black-oxide coating that extends service life in demanding environments
• Standard external hex drive design for compatibility with common tools and straightforward installation
• Regulatory compliance meeting both REACH and RoHS 3 standards for global industrial use

Professional Applications & Engineering Value

This Grade 8 heavy-duty locknut delivers critical vibration resistance in demanding industrial environments where fastener loosening can compromise system integrity. The nylon insert locking mechanism creates consistent friction against mating threads, effectively preventing back-off in high-vibration applications such as heavy machinery, construction equipment, and transportation systems. The black-oxide steel construction provides superior corrosion resistance while maintaining the high tensile strength required for structural applications. With its 1 3/4"-5 UNC coarse thread configuration and Class 2B thread fit, this locknut ensures reliable engagement and disengagement throughout its service life, making it ideal for maintenance-critical applications where repeated access may be required. The combination of high-temperature capability (up to 220°F) and regulatory compliance makes this fastener suitable for global industrial supply chains.

Specification Summary & Compliance

This locknut features Class 2B thread fit per UNC standards with right-hand coarse threading (1 3/4"-5). Manufactured from Grade 8 steel with black-oxide surface treatment, it meets dimensional specifications of 2 49/64" width and 2 5/16" height. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, ensuring environmental responsibility and global market acceptance for industrial fastening applications.