S-91850A185 5/16"-18 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 Stainless Steel construction, ideal for marine, chemical, and outdoor applications.
• Enhanced load distribution and reduced risk of loosening due to the extra wide hex profile, providing a larger bearing surface and better grip.
• Reliable and quick assembly with a coarse (UNC) thread and Class 2B fit, ensuring smooth engagement and consistent performance.
• Durable external hex drive allows for high-torque installation with standard tools, minimizing stripping and wear.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for regulated industries.
• Heavy-duty design with a substantial 9/16" width and 19/64" height for demanding applications requiring extra strength.
• Right-hand thread direction for standard, intuitive installation in most industrial and machinery setups.

Professional Applications & Engineering Value

This heavy-duty 5/16"-18 UNC hex nut is engineered from 316 Stainless Steel to address critical challenges in corrosive and high-stress environments. The extra wide profile significantly increases the clamping area, which helps prevent surface damage and distributes load more evenly, reducing the risk of joint failure in structural, machinery, and transportation applications. Its coarse thread design allows for faster assembly and better performance in environments with vibration or debris. Combined with a Class 2B thread fit, it ensures reliable, repeatable fastening without galling, making it a top choice for industrial nuts in plumbing, marine hardware, and food processing equipment where corrosion resistance and regulatory compliance are non-negotiable.

Specification Summary & Compliance

This hex nut adheres to UNC coarse thread standards with a Class 2B thread fit for consistent dimensional accuracy. It is manufactured from 316 Stainless Steel with an external hex drive, right-hand thread direction, and dimensions of 9/16" width and 19/64" height in the inch measurement system. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for industrial use.