S-99291A180 3/4"-10 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through top-lock distorted thread design, ensuring reliable performance in high-stress environments.
• Enhanced corrosion protection with zinc yellow-chromate-plated steel, extending service life in harsh industrial conditions.
• High-strength durability meeting ASTM Grade C standards, providing dependable load-bearing capacity for heavy-duty applications.
• Easy installation and removal with standard external hex drive, compatible with common tools for efficient maintenance.
• Precise thread engagement with UNC coarse threads and Class 2B fit, reducing the risk of cross-threading and ensuring secure fastening.
• Wide industrial compatibility due to right-hand thread direction and standard hex nut profile, fitting common machinery and equipment.
• Cost-effective reliability by minimizing loosening and replacement needs, lowering long-term maintenance costs.

Professional Applications & Engineering Value

This heavy-duty locknut is engineered to address critical challenges in industrial settings, such as vibration-induced loosening and corrosion. The distorted thread locking mechanism at the top creates consistent friction, maintaining clamp load under dynamic stresses common in machinery, automotive, and construction equipment. Made from zinc yellow-chromate-plated steel, it resists rust and wear, ideal for outdoor or humid environments. With UNC coarse threads and a standard external hex drive, it ensures quick, tool-friendly installation while adhering to ASTM Grade C strength requirements. This combination delivers reliable performance in applications like heavy machinery, structural assemblies, and vibrating systems, reducing downtime and enhancing safety.

Specification Summary & Compliance

This locknut features a 3/4"-10 UNC coarse thread with Class 2B thread fit for precise tolerances, and complies with ASTM Grade C standards for mechanical properties. It meets common industry specifications for dimensional accuracy, including a width of 1 1/8" and height of 41/64". The product aligns with relevant manufacturing norms for distorted thread locknuts and is designed to support compliance with general industrial safety and quality guidelines, though specific certifications like RoHS or REACH should be verified per batch.