S-98190A115 1/4"-28 Cap Nuts
Cap Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Temperature & Environment Parameters
Finish & Compliance Parameters
Cap Parameters
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Key Features & Benefits at a Glance
- Vibration-resistant locking performance with durable Nylon 6/6 insert that maintains secure fastening under dynamic loads
- High-temperature resilience with reliable locking capability up to 250°F for demanding industrial environments
- Precision fine threading with Class 2B fit ensuring smooth engagement and consistent clamping force
- Dual-material construction combining Grade 2 steel strength with protective nylon cap for corrosion prevention and finished appearance
- Standard external hex drive for easy installation using common tools while providing superior torque transmission
- Regulatory compliance meeting both REACH and RoHS 3 standards for safe use in regulated industries
- Complete thread protection with full 7/32" depth coverage and right-hand threading for standard assembly applications
Professional Applications & Engineering Value
This nylon insert locknut solves critical vibration-induced loosening problems in machinery, automotive, and industrial equipment. The Grade 2 steel body provides reliable tensile strength while the Nylon 6/6 insert creates consistent friction locking that withstands continuous motion and temperature fluctuations up to 250°F. The 1/4"-28 UNF fine thread configuration with Class 2B precision ensures perfect mating with corresponding male threads, eliminating play and maintaining joint integrity in high-cycle applications. The combination of external hex drive and protective cap nut design offers both installation convenience and finished appearance where exposed fasteners are visible.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2B thread fit and UNF fine thread specifications (1/4"-28). The nut features a 7/16" width across flats and 31/64" height for standard tool compatibility. Full compliance with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations ensures suitability for global industrial applications. The Grade 2 strength classification provides reliable performance for general engineering requirements.
