S-92949A587 5/16"-18 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 for extended service life in harsh environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under heavy loads
• Precision thread engagement with Class 3A UNC coarse threads ensuring secure fastening and vibration resistance
• Easy installation and removal with hex drive design providing positive torque transmission and reduced tool slippage
• Streamlined profile with rounded button head offering low-clearance installation without sacrificing strength
• Full thread coverage along the entire 1-1/2" length for maximum grip and load distribution
• Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 18-8 stainless steel rounded head screws deliver critical performance advantages in demanding industrial applications where corrosion resistance and mechanical reliability are paramount. The combination of 70,000 psi tensile strength and Class 3A UNC coarse threads ensures secure fastening in machinery, equipment assembly, and structural components subjected to vibration and dynamic loads. The passivated finish significantly enhances corrosion protection, making these hex drive screws ideal for chemical processing, marine environments, and outdoor installations. The rounded button head profile provides a low-profile solution for applications with clearance constraints while maintaining full structural integrity. Engineered to ASME B18.3 standards, these fully threaded fasteners offer consistent quality and performance for OEM manufacturing, maintenance operations, and precision assembly requirements.

Specification Summary & Compliance

This 5/16"-18 x 1-1/2" screw features precision UNC coarse threads with Class 3A fit for superior thread engagement and dimensional accuracy. Manufactured from 18-8 stainless steel with Rockwell B55 hardness and 70,000 psi tensile strength. The fastener is fully threaded and features a right-hand thread direction with hex drive configuration. Compliance includes ASME B18.3 manufacturing specifications, RoHS 3 (2015/863/EU) compliance, and REACH (EC 1907/2006) environmental standards.