S-90630A145 1/4"-28 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through durable nylon insert that maintains locking performance in dynamic applications
• High-temperature reliability with nylon insert rated for continuous operation up to 220°F (104°C)
• Exceptional strength performance from Grade 8 steel construction for heavy-duty industrial applications
• Precise thread engagement with Class 2B thread fit ensuring consistent torque values and secure fastening
• Easy installation and removal using standard 7/16" external hex drive compatible with common tools
• Fine thread advantage with 1/4"-28 UNF threads providing better tension control and vibration resistance
• Regulatory compliance assurance meeting both RoHS 3 and REACH environmental standards

Professional Applications & Engineering Value

This Grade 8 steel nylon insert locknut delivers critical vibration resistance in demanding industrial environments where UNF fine threads provide superior clamping force retention. The nylon insert locking mechanism creates consistent friction that prevents loosening under extreme vibration and thermal cycling, making it ideal for automotive, machinery, and heavy equipment applications. Engineered with Class 2B thread fit, this locknut ensures precise engagement with mating components while the external hex drive facilitates efficient installation in confined spaces. The combination of high-strength steel construction and temperature-resistant nylon insert addresses common failure points in dynamic assemblies, providing reliable performance where standard fasteners would compromise system integrity.

Specification Summary & Compliance

This locknut features 1/4"-28 UNF fine threads with Class 2B thread fit tolerance for precise engagement. The external hex drive measures 7/16" across flats with a standard profile height of 5/16". Manufactured from Grade 8 steel for high-strength applications, the locking mechanism utilizes a nylon insert rated for temperatures up to 220°F. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental standards for industrial components.