S-94902A111 1/4"-28 Flange Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-phosphate steel coating, ideal for harsh industrial environments
• Exceptional strength and reliability from Grade 8 classification, ensuring secure fastening under high-stress conditions
• Integrated flange design with 19/32" diameter distributes load evenly, reducing surface damage and eliminating the need for separate washers
• Precise UNF fine threading (1/4"-28) with Class 2B fit provides smooth engagement and vibration resistance in critical assemblies
• Standard external hex drive and 7/16" width allow for easy installation using common tools, improving assembly efficiency
• Compliance with REACH and RoHS 3 standards ensures environmental safety and regulatory acceptance in global markets
• Right-hand thread direction offers compatibility with standard industrial equipment and simplifies maintenance procedures

Professional Applications & Engineering Value

This Grade 8 black-phosphate steel flange nut is engineered to address common industrial challenges such as vibration loosening, corrosion degradation, and assembly inefficiency. The UNF fine thread (1/4"-28) and Class 2B thread fit ensure tight, reliable connections in machinery, automotive, and construction applications where precision is critical. The integrated 19/32" flange acts as a built-in washer, spreading clamp load over a wider area to prevent surface indentation and reduce component fatigue. Made from high-strength black-phosphate coated steel, it resists rust and wear in demanding environments, while the external hex drive facilitates quick installation with standard wrenches. Ideal for heavy-duty assemblies requiring corrosion resistance and long-term durability, this nut minimizes maintenance downtime and enhances structural integrity.

Specification Summary & Compliance

This flange nut adheres to UNF fine thread standards with a 1/4"-28 thread size and Class 2B thread fit for precise dimensional accuracy. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. Manufactured to Grade 8 strength specifications, it guarantees high tensile performance and reliability in industrial fastening applications.