S-94407A121 1/2"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking mechanism, preventing loosening in high-motion applications
• Enhanced corrosion protection with black-oxide coating on 18-8 stainless steel for extended service life in harsh environments
• Reliable high-temperature performance with nylon insert rated to 220°F (104°C) for thermal stability
• Precision UNF fine threading (1/2"-20) with Class 2B fit ensures smooth installation and secure fastening
• Standard external hex drive design for compatibility with common wrenching tools and efficient installation
• Right-hand thread configuration for standard assembly procedures and operator familiarity
• Full regulatory compliance with RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

This nylon insert locknut delivers critical vibration resistance where traditional fasteners fail. The black-oxide 18-8 stainless steel construction provides excellent corrosion resistance while the nylon insert creates consistent locking force without damaging threads. Engineered with UNF fine threading (1/2"-20) and Class 2B thread fit, it maintains precise tolerances for reliable performance in automotive assemblies, industrial machinery, and electrical enclosures subject to constant vibration. The 220°F temperature rating ensures stability in elevated temperature environments, making it ideal for engine compartments, motor mounts, and processing equipment where thermal cycling occurs.

Specification Summary & Compliance

Manufactured to precise Class 2B thread fit standards with UNF 1/2"-20 fine threading and right-hand direction. Features standard hex profile (3/4" width) with external drive style. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial suitability. Nylon insert rated for continuous service up to 220°F maximum temperature.