S-91785A552 1/4"-20 x 2 1/2" ASME B18.6.3 Stainless Steel Truss Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish, ensuring long-term reliability in harsh industrial environments
• Enhanced load distribution from the wide rounded truss head design, reducing surface pressure and preventing material damage
• High tensile strength of 100,000 psi provides exceptional clamping force and structural integrity for demanding applications
• Reliable coarse UNC threading with Class 2A fit ensures quick assembly and secure fastening in various materials
• Optimized partial threading allows for precise grip control and prevents overtightening in critical assemblies
• Industry-standard compliance with ASME B18.6.3 specifications guarantees consistent quality and interchangeability
• Environmental safety assurance through RoHS 3 and REACH compliance, meeting global regulatory requirements

Professional Applications & Engineering Value

This 1/4-20 UNC Rounded Truss Head Screw delivers exceptional engineering value in industrial fastening applications where vibration resistance and corrosion protection are critical. The combination of 18-8 Stainless Steel material and passivated finish provides superior protection against chemical exposure and atmospheric corrosion, making it ideal for machinery, electrical enclosures, and outdoor equipment. The unique truss head design offers a wider bearing surface than standard round heads, distributing clamp load more effectively to prevent surface damage on softer materials. With its coarse UNC threading and partial threading configuration, this fastener ensures rapid installation while maintaining precise engagement depth control. The 2 1/2" length provides sufficient thread engagement for thick material assemblies, while the slotted drive accommodates both manual and automated installation processes in manufacturing and maintenance operations.

Specification Summary & Compliance

This industrial fastener features precise Class 2A thread fit tolerances with 1/4"-20 UNC coarse threading and partial threading extending to a minimum of 1 1/2". Manufactured to exacting ASME B18.6.3 specifications, it ensures dimensional consistency and reliable performance. The screw demonstrates full compliance with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements, confirming its suitability for use in environmentally sensitive applications and global markets.