S-90100A101 1/4"-20 Cap Nuts

Key Features & Benefits at a Glance

• Exceptional strength and reliability with Grade 8 classification, ensuring high load-bearing capacity for demanding industrial and automotive applications.
• Superior corrosion resistance provided by zinc plating, extending service life in harsh environments and reducing maintenance needs.
• Optimized torque transmission through the external hex drive design, allowing for secure tightening with standard tools and minimizing slippage.
• Easy and quick installation with coarse 1/4"-20 UNC threads and Class 2B fit, facilitating fast assembly and reducing labor time.
• Enhanced safety and debris protection due to the cap nut profile, which covers thread ends to prevent contamination and injury.
• Compliance with environmental standards as RoHS 3 compliant, meeting regulatory requirements for lead exemption in steel alloys.
• Consistent dimensional accuracy with precise 7/16" width and 15/32" height, ensuring reliable fit and performance in repetitive applications.

Professional Applications & Engineering Value

This Grade 8 zinc-plated steel cap nut is engineered to address common industrial challenges such as vibration loosening, corrosion-induced failure, and assembly inefficiencies. Featuring 1/4"-20 UNC coarse threads and a Class 2B thread fit, it ensures quick, secure fastening in heavy-duty settings like automotive frames, machinery, and structural assemblies. The external hex drive allows for high-torque application, reducing the risk of tool slip and enhancing connection integrity. Made from robust zinc-plated steel, it resists rust and wear, making it ideal for outdoor or high-moisture environments. By combining strength, durability, and ease of use, this nut minimizes downtime and supports long-term operational reliability in sectors requiring high-strength fastening solutions.

Specification Summary & Compliance

This cap nut adheres to UNC thread standards with a Class 2B thread fit for consistent engagement and tolerance. It meets RoHS 3 (2015/863/EU) compliance under exemption 6(a)-I for lead in steel alloys, ensuring environmental safety. Dimensions include a thread size of 1/4"-20, width of 7/16", and height of 15/32", providing precise compatibility. The Grade 8 strength rating confirms high mechanical performance, suitable for rigorous industrial specifications and quality assurance protocols.