S-91785A587 5/16"-18 x 1 1/2" ASME B18.6.3 Stainless Steel Truss Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional tensile strength rated at 100,000 psi ensures reliable performance under heavy loads
• Wide truss head design provides enhanced bearing surface for superior clamping force distribution
• Coarse UNC threading enables faster installation and reduced cross-threading risk in assembly operations
• Class 2A thread fit guarantees consistent mating with standard nuts and threaded components
• Full threading along 1-1/2" length offers maximum adjustability and engagement depth flexibility
• Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH ensures regulatory acceptance

Professional Applications & Engineering Value

This rounded truss head slotted screw delivers exceptional engineering value across industrial applications where corrosion resistance and structural integrity are paramount. The 18-8 stainless steel composition, enhanced by passivated finish, provides critical protection against chemical exposure and environmental degradation in manufacturing facilities, marine equipment, and food processing machinery. The wide truss head design significantly increases surface contact area, preventing surface damage and distributing clamping forces more effectively than standard fasteners. With UNC coarse threading and Class 2A fit, these screws enable rapid assembly in production lines while maintaining precise thread engagement. The combination of 100,000 psi tensile strength and Rockwell B100 hardness ensures reliable performance in vibration-prone applications, making them ideal for heavy machinery, structural frameworks, and equipment requiring repeated maintenance access.

Specification Summary & Compliance

This 5/16"-18 x 1-1/2" rounded truss head screw maintains precise Class 2A thread fit tolerances per UNC standards, ensuring consistent mating with industrial components. Manufacturing strictly adheres to ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. The fastener is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety. With complete threading along the entire 1-1/2" length and right-hand thread orientation, it delivers reliable performance in standardized industrial assembly applications.