S-98930A313 M16 x 70 mm ASME B18.5, ISO 8678 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc yellow-chromate plated steel, ideal for harsh industrial environments
• Exceptional tensile strength of 120,000 psi and Class 8.8 rating for heavy-duty load-bearing applications
• Effective anti-rotation security provided by the square neck design, preventing loosening under vibration
• Reliable coarse threading with 2mm pitch and Class 6h fit for quick assembly and secure fastening
• Optimized partial threading allowing flexibility in clamping various material thicknesses
• Durable rounded head profile with wide bearing surface for reduced surface damage and improved aesthetics
• Industry-standard compliance with ASME B18.5 and ISO 8678 specifications ensuring interchangeability and quality

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these M16 carriage bolts deliver critical performance where vibration resistance and structural integrity are paramount. The zinc yellow-chromate plated steel construction provides enhanced corrosion protection in outdoor or chemically aggressive environments, significantly extending service life. The square neck design mechanically locks into mating materials, eliminating rotation during nut tightening and preventing loosening in high-vibration machinery, construction equipment, and transportation applications. With Class 8.8 strength rating and 120,000 psi tensile strength, these partially threaded fasteners maintain clamp force under extreme loads while the coarse thread spacing ensures rapid installation in structural steel, wood-to-metal connections, and heavy equipment assembly.

Specification Summary & Compliance

This metric carriage bolt features M16 x 2mm thread specifications with Class 6h thread fit tolerance for precise engagement. The fastener maintains Rockwell C22 hardness and complies with ASME B18.5 and ISO 8678 dimensional and mechanical property standards. Manufacturing follows industry specifications for partial threading with minimum 38mm thread length and square neck dimensions of 16.7mm width. The product meets international regulatory requirements for industrial fasteners.