S-91947A170 1/2"-13 ASME B18.2.2 Hex Nuts

Key Features & Benefits at a Glance

• Lightweight strength with 6061 aluminum construction, offering excellent weight-to-strength ratio for applications where weight reduction is critical
• Space-saving thin profile with 5/16" height, ideal for applications with limited clearance while maintaining full thread engagement
• Reliable coarse thread performance with 1/2"-13 UNC threads that resist loosening under vibration and enable quick assembly
• Precision thread fit with Class 2B tolerance ensuring consistent engagement and smooth installation with mating components
• Standardized compatibility meeting ASME B18.2.2 specifications for guaranteed interchangeability and predictable performance
• Enhanced corrosion resistance from aluminum's natural oxide layer, providing durability in various industrial environments
• Environmental compliance assurance with REACH and RoHS 3 compliance, meeting international regulatory standards for safe usage

Professional Applications & Engineering Value

This 1/2"-13 UNC thin hex nut addresses critical engineering challenges in weight-sensitive and space-constrained applications. The 6061 aluminum construction provides substantial weight reduction compared to steel alternatives while maintaining sufficient strength for most industrial fastening needs. The thin hex profile (5/16" height) enables installation in tight spaces where standard nuts cannot fit, particularly valuable in electronics enclosures, machinery guards, and automotive assemblies. The coarse UNC thread design ensures rapid installation and superior resistance to vibration-induced loosening, while the Class 2B thread fit guarantees consistent engagement with mating bolts without binding. This combination of lightweight material, compact design, and precision threading makes these aluminum fasteners ideal for applications demanding corrosion resistance, weight optimization, and reliable performance in challenging environments.

Specification Summary & Compliance

This hex nut features precision 1/2"-13 UNC coarse threads with Class 2B thread fit per ASME standards, ensuring proper clearance and smooth assembly. Manufacturing complies with ASME B18.2.2 specifications for dimensional accuracy and performance reliability. The product meets REACH (EC 1907/2006) compliance for substance restrictions and RoHS 3 (2015/863/EU) compliance with exemption 6(b)-II for lead as an alloying element in aluminum. Physical dimensions include 3/4" across flats and 5/16" height, conforming to thin hex nut profile standards in the inch measurement system.