S-98930A205 M12 x 25 mm ASME B18.5, ISO 8678 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc yellow-chromate plating that protects against rust in demanding industrial environments
• Exceptional load-bearing capacity with Class 8.8 strength rating and 110,000 psi tensile strength for heavy-duty applications
• Secure anti-rotation locking thanks to the integrated square neck that prevents spinning during installation
• Reliable coarse threading with M12 x 1.75mm pitch for faster assembly and reduced cross-threading risk
• Full thread coverage along the 25mm length provides maximum engagement and clamping force
• Consistent performance ensured by Rockwell C22 hardness for durable, long-lasting fastening
• Wide compatibility with rounded carriage head design that sits flush in various material types

Professional Applications & Engineering Value

This M12 carriage bolt delivers critical engineering solutions where vibration resistance and structural integrity are paramount. The zinc yellow-chromate plated steel construction provides exceptional corrosion protection for outdoor construction equipment, agricultural machinery, and industrial framework applications. The square neck design mechanically locks into materials during installation, eliminating rotation issues that compromise joint security in wood-to-metal and structural steel connections. With Class 8.8 strength rating and fully threaded coarse metric threading, this fastener maintains clamping force under dynamic loads and thermal cycling, making it ideal for heavy equipment assembly, trailer manufacturing, and infrastructure projects requiring reliable, maintenance-free fastening.

Specification Summary & Compliance

Manufactured to precise metric dimensions with M12 thread size and 1.75mm coarse pitch threading conforming to Class 6h thread fit tolerances. This carriage bolt meets ASME B18.5 and ISO 8678 specifications, ensuring dimensional consistency and interchangeability. The 25mm length and 26.6mm head diameter provide standardized proportions for predictable performance. Material composition and surface treatment comply with RoHS and REACH environmental directives, while the Rockwell C22 hardness and 110,000 psi tensile strength validate the declared Class 8.8 mechanical properties.