S-90519A866 3/8"-16 ASTM A108 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel coating, ideal for industrial environments
• Secure left-hand thread engagement prevents loosening under counter-clockwise rotational forces
• Space-saving thin profile (7/32" height) allows installation in tight clearance applications
• Reliable coarse UNC threading ensures quick assembly and reduced cross-threading risk
• Precision Class 2B thread fit delivers consistent clamping force and vibration resistance
• Grade 2 strength certification provides dependable performance for general-purpose fastening
• Full regulatory compliance meets RoHS 3 and REACH standards for global supply chain integration

Professional Applications & Engineering Value

This left-hand thread thin hex nut solves critical reverse-rotation challenges in rotating machinery, conveyor systems, and maintenance-sensitive equipment. The black-oxide steel construction creates a protective barrier against oxidation and chemical exposure, while the thin profile design enables integration where standard nuts cannot fit. Engineered with coarse UNC threads and Class 2B tolerance, it maintains reliable engagement in high-vibration environments where right-hand threads would naturally loosen. The external hex drive accommodates standard wrenching tools for efficient installation and removal in confined spaces.

Specification Summary & Compliance

Manufactured to ASTM A108 material specifications with Grade 2 mechanical properties. Features 3/8"-16 UNC coarse threads with Class 2B thread fit for consistent dimensional accuracy. Complies with RoHS 3 (2015/863/EU) under exemption 6(a) and REACH (EC 1907/2006) SVHC requirements. Dimensions: 9/16" width × 7/32" height.