S-91395A005 4-40 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional corrosion resistance due to premium gray fiberglass construction, ideal for harsh industrial environments
• Reliable high-temperature performance maintaining integrity up to 190°F without compromising mechanical properties
• Superior thread engagement with Class 2B fit ensuring smooth assembly and vibration resistance in demanding applications
• Standard external hex design provides familiar, tool-friendly installation with common wrench sets
• Right-hand UNC coarse threading delivers quick assembly and disassembly while preventing cross-threading issues
• RoHS 3 compliance guarantees environmental safety and meets international regulatory standards for industrial use
• Precision dimensional consistency with 1/4" width and 3/32" height for perfect fit in standardized assemblies

Professional Applications & Engineering Value

This 4-40 UNC coarse thread fiberglass hex nut delivers critical performance advantages in industrial settings where metal fasteners fail. The gray fiberglass material provides inherent resistance to corrosion, chemicals, and electrical non-conductivity, making it perfect for electrical enclosures, marine equipment, and chemical processing applications. The Class 2B thread fit ensures consistent engagement with mating components while the external hex drive style allows for high-torque installation with standard tools. With temperature resilience up to 190°F, this nut maintains structural integrity in thermal cycling environments where plastic components would degrade, offering engineers a durable alternative to traditional metal fasteners in specialized applications.

Specification Summary & Compliance

Manufactured to precise inch system standards with 4-40 UNC coarse thread specifications and Class 2B thread fit tolerance for optimal compatibility. Dimensions include 1/4" width across flats and 3/32" height following standard hex nut profile geometry. This component is fully RoHS 3 (2015/863/EU) compliant and features right-hand thread direction with external hex drive configuration suitable for industrial fastener applications requiring regulatory compliance and consistent performance.