S-90185A412 1/4"-20 x 1 3/4" ASME B18.5, SAE J429 Carriage Bolts
Carriage Bolts
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Neck & Shank Parameters
Dimension Parameters
Thread Parameters
Material & Strength Parameters
Finish & Compliance Parameters
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding environments
- Exceptional load-bearing capacity with Grade 5 classification and 120,000 psi tensile strength for heavy-duty applications
- Secure anti-rotation locking provided by the square neck design, preventing bolt spinning during installation
- Reliable coarse threading with UNC Class 3A fit ensures precise engagement and vibration resistance
- Optimized hardness performance with Rockwell C25 rating maintains structural integrity under stress
- Easy installation alignment with rounded carriage head profile and wide bearing surface
- Full regulatory compliance meeting ASME B18.5, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 5 carriage bolts deliver exceptional performance in construction, machinery assembly, and structural framing. The zinc-plated steel construction provides critical corrosion protection in environments exposed to moisture and chemicals, while the square neck design prevents rotation during torque application, ensuring secure fastening in wood-to-metal and structural wood connections. The UNC coarse threading with Class 3A fit offers superior engagement in softer materials and resists vibration loosening, making these carriage bolts ideal for agricultural equipment, trailer manufacturing, and industrial machinery where reliability is paramount. The combination of 120,000 psi tensile strength and Rockwell C25 hardness ensures these fasteners maintain integrity under substantial mechanical stress and repeated loading conditions.
Specification Summary & Compliance
This 1/4"-20 carriage bolt features precise Class 3A thread fit with UNC coarse threading and right-hand thread direction. Manufacturing complies with ASME B18.5 standards (SAE J429) for dimensional accuracy and performance. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) compliance for chemical safety, ensuring suitability for regulated industrial markets and international supply chains.
