S-91850A128 1/4"-28 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and extended service life.
• Enhanced wrenching surface from the extra wide hex profile provides superior torque application and reduces rounding or stripping.
• Precise, fine-thread engagement with 1/4"-28 UNF Class 2B threads ensures reliable, vibration-resistant connections in critical assemblies.
• Heavy-duty performance is guaranteed by the robust external hex drive and right-hand thread design for high-torque industrial applications.
• Guaranteed dimensional accuracy with a 1/2" width and 15/64" height, ensuring consistent fit and interchangeability.
• Full environmental compliance with RoHS 3 and REACH standards, making it safe for use in regulated industries and global markets.
• Optimized for demanding applications where strength, durability, and chemical resistance are non-negotiable.

Professional Applications & Engineering Value

This extra wide hex nut in 316 Stainless Steel is engineered to solve critical challenges in corrosive and high-stress environments. The UNF fine thread with a Class 2B fit provides a tighter, more secure connection that is highly resistant to loosening under vibration, a common failure point in machinery and structural applications. The external hex drive and enlarged wrenching flats allow for higher torque application with standard tools, reducing installation time and the risk of tool slip. This makes it an indispensable industrial fastener for sectors like marine, chemical processing, and food manufacturing, where equipment longevity and assembly integrity are paramount. Its design directly addresses the need for reliable, maintenance-free performance in heavy-duty operational settings.

Specification Summary & Compliance

This nut conforms to the inch system with a thread size of 1/4"-28 UNF and a Class 2B thread fit, ensuring precise dimensional tolerances for consistent performance. It is manufactured from 316 Stainless Steel and features a right-hand thread direction and fine thread spacing. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its adherence to strict international standards for hazardous substance control.