S-98858A101 1/4"-20 Cap Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments.
• Superior load-bearing capacity from Grade 5 strength rating, ensuring reliable performance under high-stress applications.
• Easy installation and removal with external hex drive design, allowing for efficient torque application using standard tools.
• Secure and precise fit with UNC coarse threads and Class 2B thread fit, reducing the risk of cross-threading and loosening.
• Complete thread protection and safety due to the cap nut profile, preventing contamination and offering a finished appearance.
• Compliance with environmental regulations through RoHS 3 adherence, supporting sustainable and safe manufacturing practices.
• Versatile compatibility with 1/4"-20 coarse thread fasteners, making it ideal for a wide range of mechanical assemblies.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel cap nut is engineered to address common industrial challenges such as vibration-induced loosening and environmental degradation. The UNC coarse thread design, combined with a Class 2B fit, ensures quick assembly and reliable retention in heavy machinery, automotive systems, and construction equipment. The external hex drive facilitates high-torque applications without slippage, while the zinc plating provides a protective barrier against rust and corrosion. Ideal for industrial fastening where durability and safety are paramount, this nut offers long-term performance in demanding settings, reducing maintenance needs and downtime.

Specification Summary & Compliance

This cap nut features precise 1/4"-20 UNC coarse threads with a Class 2B thread fit for consistent engagement and tolerance. Manufactured from high-strength steel and finished with zinc plating, it adheres to RoHS 3 (2015/863/EU) compliance under exemption 6(a)-I for lead as an alloying element. The dimensions include a width of 7/16" and height of 15/32", ensuring compatibility with standard industrial components and meeting common mechanical fastener specifications for reliability and safety.