S-90185A111 5/16"-18 x 1 1/4" ASME B18.5, SAE J429 Carriage Bolts
Carriage Bolts
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Basic Information
Head Parameters
Neck & Shank Parameters
Dimension Parameters
Thread Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior anti-rotation performance with a square neck design that prevents spinning during installation and use, ensuring secure fastening.
- High tensile strength of 120,000 psi provides reliable load-bearing capacity for demanding industrial applications.
- Durable black-oxide steel construction offers excellent corrosion resistance and a professional finish for extended service life.
- Wide rounded head profile distributes clamping force evenly, reducing surface damage and improving joint integrity.
- Full UNC coarse threading ensures quick and easy installation with a Class 2A fit for consistent engagement.
- Grade 5 strength classification guarantees consistent mechanical properties and reliability in high-stress environments.
- Rockwell C25 hardness enhances wear resistance, maintaining thread integrity through repeated use.
Professional Applications & Engineering Value
This Grade 5 Black-Oxide Steel Carriage Bolt is engineered to address common industrial fastening challenges, such as vibration-induced loosening and corrosion. The square neck securely locks into materials, preventing rotation during torque application—ideal for wood-to-metal connections in construction, machinery assembly, and transportation equipment. Made from black-oxide steel, it resists rust in moderate environments, while the fully threaded UNC coarse design allows for rapid installation and high clamp load distribution. With a tensile strength of 120,000 psi, it supports heavy-duty applications like structural frameworks and automotive components, ensuring long-term reliability without frequent maintenance.
Specification Summary & Compliance
This carriage bolt adheres to precise dimensional standards, including a Class 2A thread fit for consistent tolerance and UNC coarse threading (5/16"-18). It meets ASME B18.5 and SAE J429 specifications for quality and performance, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material sustainability.
