S-90977A140 1/4"-28 x 7/8" Coupling Nuts
Coupling Nuts
Image may differ from product. See technical specification for details.
Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
- High-strength Grade 5 rating ensures reliable performance under heavy loads and vibration
- Precise Class 2B thread fit provides smooth assembly and secure connections without cross-threading
- Fully threaded design maximizes engagement length for enhanced joint integrity
- Standard external hex drive allows for easy installation with common wrench tools
- Fine UNF threading (1/4"-28) delivers better tension control in precision applications
- Full regulatory compliance with RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel coupling nut delivers exceptional engineering value in applications requiring extended-length threaded connections. The fully threaded UNF design with Class 2B fit ensures maximum thread engagement for connecting rods, shafts, and other long fastener assemblies in machinery, automotive, and structural applications. The fine thread spacing (1/4"-28) provides superior resistance to vibration loosening compared to coarse threads, while the external hex drive facilitates quick installation in confined spaces. The zinc plating offers sacrificial protection against corrosion, making these coupling nuts ideal for outdoor equipment, industrial assemblies, and manufacturing environments where durability and reliability are critical.
Specification Summary & Compliance
This coupling nut features 1/4"-28 UNF fine threading with Class 2B thread fit per ASME/ANSI standards, ensuring precise dimensional accuracy and interchangeability. Manufactured from Grade 5 steel for consistent mechanical properties, the fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements for hazardous substance restrictions. The standard external hex drive (1/2" width) and 7/8" length provide optimal tool engagement and connection capability in inch-system applications.
