S-90389A225 1"-8 Flange Nuts

Key Features & Benefits at a Glance

• Exceptional corrosion resistance in harsh environments due to 316 stainless steel construction, ideal for chemical processing and marine applications.
• Integrated flange eliminates the need for a separate washer, speeding up assembly and providing a larger, more stable bearing surface.
• Reliable coarse threading (1"-8 UNC) ensures faster installation and reduced risk of cross-threading compared to fine threads.
• Precision Class 2B thread fit guarantees consistent engagement and secure fastening with mating bolts.
• Heavy-duty 2" flange diameter and 0.25" thickness distributes clamping force effectively, preventing surface damage and loosening under vibration.
• Standard external hex drive allows for high-torque installation using common tools, facilitating efficient maintenance.
• Full compliance with RoHS 3 and REACH regulations ensures environmental safety and unrestricted use in regulated industries.

Professional Applications & Engineering Value

This heavy-duty 316 stainless steel flange nut is engineered to solve critical challenges in demanding industrial settings. Its UNC coarse thread design is particularly valuable in applications where speed of assembly is paramount and where debris might clog finer threads. The integrated 2" flange acts as a built-in washer, which is crucial for distributing load over a wider area on softer materials or painted surfaces, preventing indentation and maintaining structural integrity. The Class 2B thread fit provides the optimal balance between ease of assembly and vibration resistance, making it a reliable choice for machinery, structural frameworks, and heavy equipment exposed to dynamic loads. The superior corrosion resistance of 316 stainless steel directly addresses the high cost of maintenance and failure in corrosive environments like chemical plants, offshore platforms, and wastewater treatment facilities, ensuring long-term service life and reduced downtime.

Specification Summary & Compliance

This flange nut conforms to the UNC (Unified Coarse) thread standard with a Class 2B thread fit for consistent and reliable mating. The dimensional profile adheres to a standard hex nut design with an external hex drive. The product is manufactured from 316 Stainless Steel and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.