S-90763A170 1 1/4"-7 ASTM A563 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional load distribution thanks to the extra wide hex profile, reducing stress concentration and preventing joint failure in heavy-duty applications
• Superior corrosion resistance provided by the black-oxide steel finish, ensuring long-term reliability in harsh industrial environments
• High-strength performance guaranteed by ASTM Grade DH certification, offering dependable clamping force for critical connections
• Easy installation and removal with standard external hex drive and coarse UNC threads, saving time during assembly and maintenance
• Precise thread engagement with Class 2B fit, minimizing cross-threading risks and ensuring secure fastening in inch-system equipment
• Compliance with industry standards including ASTM A563, providing assurance of consistent quality and material integrity
• Environmental regulation adherence through RoHS 3 and REACH compliance, making them suitable for global supply chains

Professional Applications & Engineering Value

Engineered for demanding industrial scenarios, these heavy-duty hex nuts solve critical challenges in construction, machinery, and structural applications. The black-oxide steel construction provides an effective barrier against rust and corrosion, extending service life in environments exposed to moisture or chemicals. With their extra wide profile, these nuts distribute clamping force over a larger surface area, preventing material deformation in soft substrates and maintaining joint integrity under vibration or dynamic loads. The 1 1/4"-7 UNC coarse threads offer rapid installation in thick materials while the Class 2B thread fit ensures smooth engagement without galling. These features make them ideal for heavy equipment, structural steel connections, and industrial machinery where reliability and corrosion resistance are paramount.

Specification Summary & Compliance

This hex nut features precise Class 2B thread fit with 1 1/4"-7 UNC coarse threads in right-hand direction, manufactured to ASTM A563 specifications with ASTM Grade DH strength classification. Dimensions include 1.969" width across flats and 1.219" height. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring restricted substance compliance for industrial applications worldwide.