S-90521A044 1 3/4"-8 ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional load distribution through extra wide profile design, preventing surface damage and maintaining joint integrity under heavy loads
• Heavy-duty strength performance with ASTM Grade 2H certification, ensuring reliable performance in demanding industrial applications
• Precision thread engagement with Class 2B thread fit, providing consistent clamping force and vibration resistance
• Superior durability from high-grade steel construction, offering excellent corrosion resistance and long service life
• Easy installation and removal with standard external hex drive design, compatible with common industrial tools
• Regulatory compliance assurance meeting RoHS 3 and REACH standards, ensuring environmental and safety requirements are met
• Optimized for coarse thread applications with 1 3/4"-8 UN thread specification, providing quick assembly and disassembly in heavy machinery

Professional Applications & Engineering Value

This heavy-duty hex nut delivers exceptional engineering value through its ASTM Grade 2H steel construction and extra wide profile, specifically designed to address critical industrial challenges. The substantial 2 3/4" width and 1 23/32" height create an enlarged bearing surface that distributes clamping forces evenly, preventing stress concentration and surface deformation in heavy machinery applications. The coarse UN thread with Class 2B fit ensures reliable engagement even in vibrating environments, making it ideal for construction equipment, mining machinery, and structural steel connections where right-hand thread fasteners are standard. Manufactured to ASTM A194 specifications, this industrial hex nut provides the consistent quality and performance demanded by engineering professionals in critical assembly operations.

Specification Summary & Compliance

This heavy-duty fastener features precision Class 2B thread fit with 1 3/4"-8 coarse UN thread specification and right-hand thread direction. Manufactured in compliance with ASTM A194 standards and certified to ASTM Grade 2H for heavy-duty applications. The component meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards, ensuring environmental responsibility and workplace safety. Dimensions include 2 3/4" width and 1 23/32" height, designed for optimal performance in inch system applications.