S-92949A546 1/4"-20 x 1 1/2" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-lasting performance in harsh environments
• Exceptional tensile strength rated at 70,000 psi provides reliable holding power for demanding industrial applications
• Precise Class 3A thread fit ensures secure, vibration-resistant connections with minimal risk of loosening
• Convenient hex drive design with 5/32" drive size allows for easy installation and removal with standard tools
• Full threading along the entire 1-1/2" length maximizes engagement and load distribution across connected materials
• Optimized mechanical properties with Rockwell B55 hardness balance durability with necessary ductility
• Comprehensive regulatory compliance meets ASME B18.3, RoHS 3, and REACH standards for quality assurance

Professional Applications & Engineering Value

This 18-8 stainless steel rounded head screw delivers exceptional engineering value across industrial applications where corrosion resistance and mechanical reliability are critical. The combination of UNC coarse threads and Class 3A fit provides superior vibration resistance in machinery, automotive assemblies, and structural frameworks. The passivated finish significantly enhances the natural corrosion resistance of stainless steel, making these hex drive screws ideal for outdoor equipment, marine environments, and chemical processing facilities. With full threading along the entire 1-1/2" length, engineers benefit from maximum thread engagement that distributes clamping forces evenly, reducing stress concentrations and preventing joint failure in heavy-duty fastening applications.

Specification Summary & Compliance

This 1/4"-20 UNC coarse thread screw features precision Class 3A thread fit tolerances and full compliance with ASME B18.3 manufacturing specifications. The fastener meets rigorous industry standards including RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) compliance for chemical safety. Mechanical properties include Rockwell B55 hardness and 70,000 psi tensile strength, ensuring consistent performance across industrial applications requiring reliable rounded head hex drive screws.