S-91785A539 1/4"-20 x 5/8" ASME B18.6.3 Stainless Steel Truss Head Slotted 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 holding power with 100,000 psi tensile strength and Rockwell B100 hardness for reliable performance under heavy loads
• Enhanced load distribution through wide rounded truss head design that prevents pull-through in softer materials
• Easy installation and removal with standard slotted drive compatible with common hand tools
• Precise thread engagement with Class 2A thread fit ensuring consistent performance and easy assembly
• Maximum thread contact through fully threaded design for superior clamping force across the entire length
• Industry-standard compatibility with UNC coarse thread pattern for reliable mating with standard components

Professional Applications & Engineering Value

This 1/4"-20 truss head screw delivers exceptional engineering value for industrial applications requiring both corrosion resistance and high clamping force. The 18-8 stainless steel construction with passivated finish provides superior protection against rust and chemical exposure, making it ideal for marine, food processing, and outdoor equipment applications. The unique wide rounded truss head design offers significantly larger bearing surface than standard heads, distributing clamping force more effectively to prevent material damage and maintain joint integrity. With UNC coarse threading and Class 2A thread fit, these screws ensure quick assembly and reliable performance in vibration-prone environments. The combination of 100,000 psi tensile strength and fully threaded design makes them perfect for applications where maximum grip and pull-out resistance are critical.

Specification Summary & Compliance

This truss head screw features precise Class 2A thread fit with UNC coarse thread specification (1/4"-20) and right-hand threading. Manufactured to ASME B18.6.3 standards for dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. All dimensions maintain tight tolerances with 5/8" length, 0.25" thread diameter, and 0.573" head diameter for consistent performance in demanding applications.