S-90185A153 5/8"-11 x 3 1/2" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance with a square neck design that securely locks into materials, preventing spinning during installation and ensuring stable, long-term fastening.
• Exceptional tensile strength of 120,000 psi and Grade 5 classification, providing reliable load-bearing capacity for demanding industrial applications.
• Enhanced corrosion resistance through black-oxide steel construction, offering durable protection against rust and extending service life in harsh environments.
• Easy, quick installation with fully threaded UNC coarse threading and right-hand direction, allowing for faster assembly and reduced labor time.
• Wide-rounded head profile distributes clamping force evenly, minimizing surface damage and improving grip in wood, metal, and structural assemblies.
• Precise dimensional accuracy with Class 2A thread fit, ensuring consistent performance and compatibility with standard nuts and components.
• High hardness rating of Rockwell C25, delivering excellent wear resistance and durability under repetitive stress and vibration.

Professional Applications & Engineering Value

This Grade 5 Carriage Bolt is engineered to address critical fastening challenges in heavy-duty industries, such as construction, machinery, and transportation. The black-oxide steel material provides robust corrosion resistance, ideal for outdoor or humid conditions where rust can compromise integrity. Its square neck design effectively counters rotation during torque application, eliminating the need for additional locking mechanisms and speeding up assembly in wood-to-metal or structural joints. With fully threaded UNC coarse threads, it ensures rapid installation and strong holding power, while the rounded head offers a flush finish that reduces snagging risks. Meeting ASME B18.5 standards, this bolt delivers consistent quality for applications requiring high tensile strength and reliability, from agricultural equipment to industrial frameworks.

Specification Summary & Compliance

This carriage bolt adheres to precise dimensional standards, including a Class 2A thread fit for reliable engagement and UNC coarse threading (5/8"-11) for ease of use. It conforms to ASME B18.5 and SAE J429 specifications, ensuring manufacturing consistency and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material sustainability in industrial supply chains.