S-91785A554 1/4"-20 x 3" 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, ideal for harsh industrial environments
• Exceptional load-bearing capacity with 100,000 psi tensile strength and Rockwell B100 hardness for reliable performance
• Wide bearing surface from the truss head design distributes clamping force effectively, reducing material damage
• Easy installation and removal with standard slotted drive and coarse UNC threading for quick assembly
• Precise thread engagement with Class 2A fit ensures consistent fastening in demanding applications
• Regulatory compliance meets ASME B18.6.3 standards and environmental regulations (RoHS 3, REACH)
• Optimized partial threading provides secure fastening while minimizing thread damage in deep holes

Professional Applications & Engineering Value

This 1/4-20 UNC stainless steel truss head screw delivers critical engineering advantages in industrial settings where vibration resistance and corrosion protection are paramount. The 18-8 stainless steel construction combined with passivated surface treatment creates a durable barrier against chemical exposure and atmospheric corrosion, extending service life in manufacturing equipment, marine applications, and food processing machinery. The unique truss head profile offers a wider bearing surface than standard rounded heads, distributing clamping force more effectively to prevent surface damage on softer materials. With partial threading and coarse thread spacing, this fastener maintains secure connections in high-vibration environments while facilitating quicker installation in production lines. The slotted drive style ensures compatibility with standard tools, making it ideal for maintenance and assembly operations across multiple industries.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit tolerance per UNC standards with precise 1/4"-20 coarse threading and 3" overall length. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe use across global markets.