S-93548A566 1/4"-20 x 6" ASTM A307, SAE J429, ASME B18.5 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 corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
- Excellent anti-rotation performance thanks to the square neck design that prevents spinning during installation
- Reliable holding power with Grade 2 strength rating and 60,000 PSI tensile strength for medium-duty applications
- Easy installation and removal with UNC coarse threading and Class 2A fit for smooth engagement
- Enhanced durability with Rockwell B70 hardness that maintains structural integrity under stress
- Versatile compatibility with fully threaded 6" length suitable for various material thicknesses
- Wide head distribution with rounded carriage profile that minimizes surface damage and provides secure fastening
Professional Applications & Engineering Value
These zinc-plated steel carriage bolts deliver exceptional performance in construction, manufacturing, and industrial maintenance applications. The square neck design effectively prevents rotation during tightening, eliminating the need for secondary locking mechanisms and reducing installation time. The UNC coarse threading ensures quick assembly in wood, metal, and composite materials, while the Class 2A thread fit provides consistent engagement without binding. The zinc plating offers reliable protection against corrosion in moderately harsh environments, making these Grade 2 carriage bolts ideal for structural connections, equipment frames, and machinery where 60,000 PSI tensile strength meets demanding mechanical requirements without the cost premium of higher-grade fasteners.
Specification Summary & Compliance
This 1/4"-20 x 6" carriage bolt features UNC coarse threading with Class 2A thread fit for standard tolerance applications. Manufactured to meet ASTM A307, SAE J429, and ASME B18.5 specifications, ensuring consistent quality and dimensional accuracy. The product is RoHS 3 (2015/863/EU) Compliant, meeting environmental regulations for restricted substances. With Rockwell B70 hardness and Grade 2 strength classification, these bolts provide reliable performance for industrial and construction fastening requirements.
