S-91884A227 5/16"-18 Cap Nuts

Key Features & Benefits at a Glance

• Superior machinability and strength from 2011 Aluminum alloy, ensuring precise manufacturing and reliable performance in demanding applications
• Secure, vibration-resistant fastening with Class 2B coarse UNC threads, providing excellent engagement and reducing the risk of loosening under stress
• Easy installation and removal thanks to the external hex drive design, allowing for standard wrench access and efficient assembly
• Durable, corrosion-resistant construction with 2011 Aluminum, offering long service life in various industrial environments
• Full end closure protection from the cap nut profile, shielding threads from debris and enhancing safety
• Regulatory compliance assurance with RoHS 3 (2015/863/EU) standards, meeting environmental and safety requirements for industrial use
• Optimized dimensions (9/16" width, 7/16" height) for consistent fit and space-efficient designs in assemblies

Professional Applications & Engineering Value

This 5/16"-18 UNC cap nut is engineered to address common industrial fastening challenges, such as thread damage and corrosion. Made from 2011 Aluminum, it combines excellent machinability with lightweight durability, ideal for applications where weight reduction is critical without sacrificing strength. The Class 2B coarse thread ensures quick assembly and reliable hold in materials prone to stripping, while the external hex drive allows for high-torque installation with standard tools. Commonly used in machinery, automotive, and electronics, this nut provides a sealed finish that prevents contamination, making it a go-to choice for industrial cap nuts in harsh environments. Its RoHS compliance further supports use in regulated sectors, ensuring safety and sustainability.

Specification Summary & Compliance

This cap nut features a 5/16"-18 UNC coarse thread with Class 2B fit for consistent dimensional accuracy and ease of assembly. It adheres to standard inch measurements, with a width of 9/16" and height of 7/16", and is manufactured from 2011 Aluminum for reliable performance. The product is RoHS 3 (2015/863/EU) compliant under exemption 6(b)-II for lead as an alloying element in aluminum, ensuring it meets environmental regulations for industrial fasteners.