S-90303A130 1/4"-20 x 3/4" ASME B18.3, ASTM A574 Nylon-Tip Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Surface Protection: Integrated non-marring nylon tip prevents damage to sensitive components and finished surfaces during assembly
• Exceptional Strength: 180,000 psi tensile strength and Rockwell C39 hardness ensure reliable performance under high-stress conditions
• Corrosion-Resistant Finish: Black-oxide coating on alloy steel provides enhanced durability and resistance to environmental factors
• Precise Thread Engagement: Class 3A thread fit with UNC coarse threads delivers secure, vibration-resistant fastening in industrial applications
• Wide Temperature Tolerance: Nylon tip maintains integrity across -50° to 250°F for consistent performance in varying environments
• Standardized Compatibility: Manufactured to ASME B18.3 specifications ensuring interchangeability and reliable engineering fit
• Secure Drive System: Hex socket head design allows for high-torque installation without slippage in confined spaces

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these socket head cap screws solve critical assembly challenges where surface protection and high-strength fastening are paramount. The black-oxide alloy steel construction provides superior corrosion resistance while maintaining the 180,000 psi tensile strength necessary for structural components and machinery. The non-marring nylon tip specifically addresses damage prevention in precision equipment, electronic enclosures, and finished products where surface integrity is essential. With UNC coarse threads and Class 3A thread fit, these screws ensure rapid installation and vibration resistance in production environments, reducing assembly time while maintaining joint integrity. The combination of hex drive design and standardized ASME B18.3 dimensions guarantees compatibility with existing tooling and fixtures.

Specification Summary & Compliance

This 1/4"-20 x 3/4" socket head cap screw features precision UNC coarse threads with Class 3A thread fit for superior engagement and tolerance control. Manufactured in compliance with ASME B18.3 specifications ASTM A574, ensuring dimensional accuracy and mechanical performance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations (06/14/2023 235 SVHC), meeting international environmental and safety standards for industrial components.