S-90185A126 3/8"-16 x 2 3/4" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior Anti-Rotation Performance - Square neck design prevents spinning during installation, ensuring secure fastening in wood and metal applications
• Heavy-Duty Load Capacity - Grade 5 classification with 120,000 PSI tensile strength handles demanding industrial applications
• Enhanced Corrosion Resistance - Black-oxide steel construction provides durable protection against rust and environmental elements
• Reliable Thread Engagement - Fully threaded 3/8"-16 UNC coarse spacing with Class 2A fit ensures consistent, vibration-resistant connections
• Optimized Installation Efficiency - Wide rounded head profile distributes load evenly while allowing for faster assembly
• Industry-Compliant Quality - Meets ASME B18.5 specifications for guaranteed dimensional accuracy and performance reliability
• Environmental Responsibility - RoHS 3 and REACH compliant for safe use in regulated industrial environments

Professional Applications & Engineering Value

This Grade 5 carriage bolt delivers exceptional engineering value through its black-oxide steel construction and specialized design features. The square neck provides critical anti-rotation capability, solving common installation challenges in wood-to-metal applications and structural framing where fastener security is paramount. The fully threaded UNC coarse spacing ensures rapid assembly while maintaining vibration resistance in heavy machinery, agricultural equipment, and construction applications. With Rockwell C25 hardness and 120,000 PSI tensile strength, this fastener withstands extreme mechanical stresses, making it ideal for load-bearing connections in industrial settings. The rounded head profile offers superior bearing surface distribution, preventing material damage while maintaining aesthetic appeal in visible applications.

Specification Summary & Compliance

This carriage bolt features precise Class 2A thread fit with 3/8"-16 UNC coarse thread specifications, ensuring reliable engagement and interchangeability. Manufactured to ASME B18.5 standards with dimensional accuracy including 2-3/4" length and 0.375" diameter. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting current industry compliance requirements for hazardous substance restrictions.