S-90521A282 2 1/4"-4 1/2 ASME B18.2.2, ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Superior load distribution thanks to the extra wide hex profile that provides greater surface contact and prevents embedding in softer materials
• Exceptional mechanical strength with ASTM Grade 2H certification ensuring high clamp load retention and resistance to vibration loosening
• Faster assembly times with coarse UNC threading that enables quick installation and reduces cross-threading risks
• Precise thread engagement through Class 2B fit that maintains consistent torque values and connection integrity
• Enhanced durability with steel construction meeting ASME B18.2.2 and ASTM A194 specifications for heavy-duty service conditions
• Environmental compliance with RoHS 3 and REACH regulations ensuring safe use in regulated industrial applications
• Optimal tool engagement through external hex drive design that accommodates standard wrenches for secure tightening

Professional Applications & Engineering Value

This heavy-duty hex nut delivers critical engineering solutions for industrial applications where maximum load distribution and vibration resistance are paramount. The extra wide profile significantly increases bearing surface area, effectively distributing clamp loads across a broader area to prevent material deformation in structural connections, heavy machinery, and large-scale fabrication projects. Manufactured from high-grade steel with coarse UNC threading, these nuts maintain thread integrity under extreme stress conditions while enabling rapid installation in field applications. The Class 2B thread fit ensures consistent torque-tension relationships, making them ideal for critical bolted joints in construction, mining equipment, and industrial processing systems where reliability cannot be compromised.

Specification Summary & Compliance

This 2 1/4"-4 1/2 UNC hex nut features Class 2B thread tolerance for precise fitment and meets ASME B18.2.2 dimensional standards and ASTM A194 material specifications. The nut complies with ASTM Grade 2H mechanical requirements for heavy-duty applications and carries full RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance certifications. With dimensions of 3 1/2" width and 2 13/64" height, it's engineered for right-hand thread applications in inch measurement systems.