S-90738A180 1/2"-20 Hex Nuts

Key Features & Benefits at a Glance

• Left-hand thread design provides secure fastening in applications requiring reverse-threading to prevent loosening from counter-clockwise motion
• Grade 5 strength rating delivers reliable performance under medium-duty loads with consistent clamping force
• Zinc-plated steel construction offers excellent corrosion resistance for extended service life in industrial environments
• Fine UNF thread profile ensures superior vibration resistance and precise adjustment capabilities
• Class 2B thread fit guarantees smooth assembly and consistent torque performance
• Standard hex profile allows for easy installation with common wrench tools
• RoHS 3 and REACH compliance meets international environmental standards for safe usage

Professional Applications & Engineering Value

This left-hand thread hex nut solves critical engineering challenges in applications where standard right-hand threads would naturally loosen due to rotational forces. The Grade 5 zinc-plated steel construction provides the ideal balance of strength and corrosion resistance for demanding industrial environments. The 1/2"-20 UNF fine thread configuration delivers enhanced vibration resistance, making it particularly valuable in machinery, automotive, and equipment applications where reverse-threading functionality is essential. The external hex drive design ensures compatibility with standard tools while the precise Class 2B thread fit guarantees consistent torque values and reliable performance in assembly operations requiring left-hand threading solutions.

Specification Summary & Compliance

This hex nut features 1/2"-20 UNF left-hand fine threads with Class 2B thread fit for precise engagement. Dimensions include 3/4" width across flats and 7/16" height. Manufactured to Grade 5 strength standards with zinc-plated steel construction. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.