S-96177A290 5/16"-24 x 2" ASTM A108 Coupling Nuts

Key Features & Benefits at a Glance

• Corrosion-resistant black-oxide steel construction provides enhanced durability and longevity in harsh industrial environments.
• Full threading along the entire 2" length ensures maximum engagement and secure connections in extended assemblies.
• Precision Class 2B thread fit guarantees smooth assembly and reliable performance with mating components.
• ASTM A108 compliance assures consistent material quality and mechanical properties for demanding applications.
• Fine UNF 5/16"-24 threading offers superior vibration resistance and improved torque control compared to coarse threads.
• RoHS 3 and REACH compliance meets stringent environmental regulations for safe use in regulated industries.
• Standard right-hand thread design enables straightforward installation and compatibility with common fastener systems.

Professional Applications & Engineering Value

This black-oxide steel coupling nut delivers exceptional value in applications requiring extended thread engagement and corrosion protection. The fully threaded design allows for adjustable positioning in hydraulic systems, machinery frames, and structural assemblies where precise length adjustment is critical. The fine UNF threading (5/16"-24) provides superior resistance to loosening under vibration, making it ideal for automotive, aerospace, and heavy equipment applications. The black-oxide surface treatment creates a protective barrier against oxidation without significantly altering dimensional tolerances, ensuring consistent performance in outdoor or high-moisture environments. Engineers specify this ASTM A108 compliant coupling nut for its reliable torque transmission and ability to maintain clamp load in dynamic loading conditions.

Specification Summary & Compliance

This coupling nut features 5/16"-24 UNF fine threads with Class 2B fit for precise thread engagement. Manufactured to ASTM A108 specifications with standard profile dimensions (OD: 27/64", Length: 2"). The product is RoHS 3 (2015/863/EU) compliant with exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) compliant with the latest SVHC list (01/17/2023, 233 substances).