S-90185A101 1/4"-20 x 3/4" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior load-bearing capacity with Grade 5 classification and 120,000 psi tensile strength for demanding industrial applications
• Enhanced corrosion resistance through black-oxide steel construction, extending service life in various environments
• Secure anti-rotation locking with square neck design that prevents spinning during installation and operation
• Optimized thread engagement through Class 2A UNC coarse threading for faster assembly and reliable performance
• Consistent mechanical properties with Rockwell C25 hardness ensuring durability and resistance to deformation
• Versatile compatibility with fully threaded right-hand design suitable for multiple fastening scenarios
• Regulatory compliance assurance meeting major industry standards for quality and environmental safety

Professional Applications & Engineering Value

This Grade 5 carriage bolt delivers exceptional engineering value for industrial assembly applications where vibration resistance and structural integrity are critical. The black-oxide steel construction provides superior corrosion protection compared to standard finishes, while the square neck design mechanically locks into materials to prevent rotation during torque application - eliminating the need for additional locking mechanisms. The fully threaded UNC coarse threading ensures rapid installation and maintains holding power in wood, metal, and composite materials. With 120,000 psi tensile strength and consistent Rockwell C25 hardness, these carriage bolts withstand extreme mechanical stresses in construction equipment, agricultural machinery, transportation systems, and structural frameworks where reliability cannot be compromised.

Specification Summary & Compliance

This heavy-duty fastener features precise Class 2A thread fit tolerances with 1/4"-20 UNC coarse threading and right-hand orientation. Manufactured to ASME B18.5 and SAE J429 specifications for dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. The combination of Grade 5 strength classification and standardized dimensions guarantees interchangeability and performance consistency in industrial applications.