S-91339A135 1/4"-28 UL 50 Sealing Nuts

Key Features & Benefits at a Glance

• Superior sealing performance with silicone rubber seal that prevents leaks in demanding environments
• Exceptional pressure resistance up to 6000 psi for reliable operation in high-pressure systems
• Wide temperature tolerance from -100° to 400° F maintains seal integrity across extreme conditions
• Corrosion-resistant 18-8 stainless steel construction ensures long-term durability in harsh industrial settings
• Precision Class 2B thread fit provides smooth installation and secure fastening with UNF fine threads
• Standard external hex drive enables easy installation with common tools while maintaining consistent torque
• Full regulatory compliance with UL 50, RoHS 3, and REACH standards for quality assurance and environmental safety

Professional Applications & Engineering Value

This 1/4"-28 UNF sealing nut delivers critical sealing solutions for industrial applications where pressure integrity and environmental resistance are paramount. The 18-8 stainless steel body provides excellent corrosion resistance, while the integrated silicone rubber seal maintains performance across extreme temperature fluctuations from -100° to 400° F. Engineered with Class 2B thread fit and UNF fine threads, this external hex sealing nut ensures reliable sealing in hydraulic systems, pneumatic equipment, and fluid handling applications where 6000 psi pressure rating and consistent performance under vibration are essential. The combination of robust materials and precision manufacturing makes it ideal for aerospace, automotive, and industrial machinery applications requiring dependable, long-term sealing solutions.

Specification Summary & Compliance

This sealing nut features 1/4"-28 UNF fine threads with Class 2B thread fit for precise engagement and reliable performance. The standard external hex drive (7/16" width) ensures compatibility with common tools. Manufacturing and quality standards include compliance with UL 50 for enclosure integrity, RoHS 3 (2015/863/EU) for hazardous substance restrictions, and REACH (EC 1907/2006) for chemical safety. The nut maintains dimensional accuracy per industry standards with right-hand thread direction and standard hex profile for consistent performance across applications.