S-98060A250 1/4"-20 x 1 1/4" SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh environments
• Exceptional tensile strength of 120,000 psi (Grade 5) for reliable performance in heavy-duty applications
• Secure anti-rotation design with knurled neck that prevents loosening under vibration and dynamic loads
• Easy installation and removal with UNC coarse threading and Class 2A fit for quick assembly in various materials
• Wide bearing surface from the rounded carriage head distributes load evenly, reducing surface damage
• Consistent hardness at Rockwell C25 ensures durability and resistance to wear during repeated use
• Regulatory compliance with SAE J429, RoHS 3, and REACH standards for safe, industry-approved applications

Professional Applications & Engineering Value

These Grade 5 zinc-plated steel carriage bolts are engineered to address critical challenges in industrial and construction settings, where vibration resistance and long-term reliability are paramount. The knurled neck design effectively locks the bolt in place, preventing rotation during torque application and in high-stress environments like machinery frames and structural assemblies. With UNC coarse threading and partial threading, they provide superior grip in wood, metal, and composite materials, reducing the risk of stripping. The zinc plating offers a protective barrier against moisture and chemicals, making these carriage bolts ideal for outdoor equipment, agricultural machinery, and transportation infrastructure. Their high tensile strength and compliance with SAE J429 ensure they meet rigorous performance demands, delivering consistent fastening solutions that minimize maintenance and downtime.

Specification Summary & Compliance

This carriage bolt features precise Class 2A thread fit and UNC 1/4"-20 coarse threading with right-hand direction, ensuring dimensional accuracy per industry standards. It complies with SAE J429 for mechanical properties and is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental and safety adherence. The specifications include a minimum thread length of 1/2" and Rockwell C25 hardness, supporting consistent performance in regulated applications.