S-90083A030 5/16"-18 Hex Nuts

Key Features & Benefits at a Glance

• Left-hand threading provides secure fastening in applications requiring reverse rotation resistance, preventing accidental loosening under counter-clockwise forces
• Thin profile design (3/16" height) saves valuable space in compact assemblies while maintaining full thread engagement
• Grade 2 steel construction offers reliable strength and durability for general industrial applications without unnecessary cost premium
• Class 2B thread fit ensures consistent, trouble-free installation with standard male threads, reducing assembly time and rejection rates
• Coarse UNC threading enables quick installation and removal while resisting vibration-induced loosening in demanding environments
• External hex drive provides superior torque transmission with standard wrenching tools, minimizing stripping and tool slippage
• Full regulatory compliance with RoHS 3 and REACH standards ensures environmental responsibility and global market acceptance

Professional Applications & Engineering Value

This specialized left-hand thread hex nut solves critical engineering challenges in applications where standard right-hand rotation would cause unintended loosening. The 5/16"-18 UNC coarse thread configuration combined with Grade 2 steel material delivers optimal performance in machinery subjected to reverse rotational forces, such as rotating shaft assemblies, mixing equipment, and certain automotive components. The thin hex nut profile is particularly valuable in space-constrained applications where standard nut height would interfere with adjacent components. The external hex drive design ensures compatibility with common industrial tools while the Class 2B thread fit guarantees consistent engagement with mating components, reducing installation errors and improving production efficiency in manufacturing and maintenance operations.

Specification Summary & Compliance

This fastener maintains precise Class 2B thread fit tolerances per UNC standards with 5/16"-18 coarse thread spacing. The nut features a 1/2" width across flats and 3/16" height in the thin profile configuration. Manufacturing complies with standard industrial specifications for Grade 2 steel hex nuts and demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial markets and environmentally conscious manufacturing operations.