S-92771A529 1/4"-28 Thumb Nuts

Key Features & Benefits at a Glance

• Effortless manual installation with convenient wing-shaped head for tool-free tightening and adjustment
• Superior corrosion resistance thanks to durable brass construction ideal for harsh industrial environments
• Precise thread engagement with Class 2B fit ensuring reliable, vibration-resistant fastening
• Excellent durability from fine UNF 1/4"-28 threads that maintain integrity under repeated use
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global market access
• Optimized grip surface with 1 1/8" width providing maximum torque application comfort
• Space-efficient design with 5/8" height profile suitable for compact assembly applications

Professional Applications & Engineering Value

This brass thumb nut delivers exceptional value in applications requiring frequent manual adjustments or tool-free maintenance. The UNF fine threading (1/4"-28) combined with Class 2B thread fit provides superior resistance to loosening from vibration, making it ideal for precision instruments, electrical enclosures, and machinery requiring periodic service access. The corrosion-resistant brass material ensures long-term reliability in humid, chemical, or outdoor environments where steel fasteners would deteriorate. The standard wing nut profile with generous 1 1/8" width offers ergonomic handling for operators, reducing installation time and eliminating the need for specialized tools in maintenance-heavy industrial settings.

Specification Summary & Compliance

This thumb nut features 1/4"-28 UNF fine threads with Class 2B thread fit per Unified National Fine standards, ensuring precise dimensional accuracy and reliable performance. The right-hand thread direction follows conventional installation practices. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental compliance and restriction of hazardous substances. Critical dimensions include 31/64" base diameter, 1 1/8" width, and 5/8" height for consistent integration into designed assemblies.