S-98190A111 3/8"-16 Cap Nuts

Key Features & Benefits at a Glance

• Vibration-resistant locking through nylon insert technology prevents loosening under dynamic loads
• Enhanced corrosion protection with zinc-plated steel construction for extended service life
• Temperature resilience maintaining performance up to 250°F in demanding environments
• Secure thread engagement with Class 2B UNC coarse threads for reliable fastening
• Tool-friendly installation via external hex drive design for efficient assembly
• Aesthetic protection with black nylon 6/6 cap preventing surface damage
• Regulatory compliance meeting RoHS 3 and REACH standards for global applications

Professional Applications & Engineering Value

These nylon insert locknuts deliver critical vibration resistance in industrial assemblies where mechanical shocks and thermal cycling compromise fastener integrity. The Grade 2 zinc-plated steel core provides structural strength while the black nylon 6/6 cap protects mating surfaces from galling and corrosion. Engineered with UNC coarse threads and Class 2B fit, these external hex drive cap nuts maintain clamping force in automotive, machinery, and structural applications where temperature fluctuations up to 250°F would degrade conventional fasteners. The combination of mechanical locking and environmental protection makes these components ideal for maintenance-sensitive installations requiring long-term reliability.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2B thread fit and UNC 3/8"-16 coarse threading. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. Features Grade 2 strength rating with standard external hex drive configuration measuring 9/16" width and 5/8" height. Right-hand thread orientation ensures compatibility with standard industrial components.