S-93548A540 1/4"-20 x 3/4" 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
- Prevents rotation during installation thanks to the integrated square neck design that locks securely into materials
- Excellent tensile strength rated at 60,000 PSI (Grade 2) ensures reliable performance under heavy loads
- Optimized thread engagement with UNC coarse threading and Class 2A fit for faster installation and secure fastening
- Enhanced durability with Rockwell B70 hardness that resists wear and deformation
- Versatile rounded head design provides a finished appearance while distributing clamping force effectively
- Full threading capability allows for maximum adjustment and secure fastening through entire material thickness
Professional Applications & Engineering Value
These zinc-plated steel carriage bolts deliver exceptional performance in wood-to-wood fastening applications where rotational stability is critical. The square neck design eliminates the need for additional anti-rotation measures, significantly reducing installation time while preventing bolt spin during tightening. The UNC coarse thread pattern ensures quick engagement and superior pull-out resistance in softer materials, while the zinc plating provides essential corrosion protection for both indoor and outdoor applications. With fully threaded construction and right-hand threading, these fasteners offer maximum versatility for various assembly requirements in construction, furniture manufacturing, and structural framing projects.
Specification Summary & Compliance
This 1/4"-20 carriage bolt features precise Class 2A thread fit tolerances and complies with multiple industry standards including ASTM A307, SAE J429, and ASME B18.5. The fastener meets Grade 2 strength classification with verified 60,000 PSI tensile strength and is manufactured to be RoHS 3 (2015/863/EU) Compliant, ensuring environmental regulatory adherence for global distribution and use.
