S-90519A857 10-24 ASTM A108 Hex Nuts

Key Features & Benefits at a Glance

• Left-hand threading provides secure fastening in applications requiring reverse rotation resistance, preventing accidental loosening
• Black-oxide steel construction offers superior corrosion resistance and durability in demanding industrial environments
• Thin profile design enables installation in space-constrained applications where standard nuts won't fit
• Grade 2 strength rating ensures reliable performance for medium-duty fastening requirements
• Coarse UNC thread spacing allows for quicker installation and reduced cross-threading risks
• Class 2B thread fit provides optimal balance between easy assembly and secure fastening
• External hex drive enables straightforward installation using standard wrenches and sockets

Professional Applications & Engineering Value

This 10-24 UNC left-hand thin hex nut addresses critical engineering challenges in industrial settings where reverse-thread applications are essential. The black-oxide steel construction provides enhanced corrosion protection, making it ideal for machinery, equipment, and automotive applications exposed to moderate environmental conditions. The thin hex nut profile is particularly valuable in compact assemblies and tight clearance situations where standard-height nuts would interfere with adjacent components. The left-hand thread direction serves specialized applications where conventional right-hand threading could loosen under specific rotational forces, ensuring maintained tension in rotating systems. Engineered to ASTM A108 specifications, this fastener delivers consistent performance in manufacturing, maintenance, and repair operations requiring reliable left-hand fastening solutions.

Specification Summary & Compliance

This hex nut features precise Class 2B thread fit with 10-24 UNC coarse thread spacing in left-hand direction. Manufacturing complies with ASTM A108 standards, ensuring dimensional accuracy and material consistency. The fastener meets Grade 2 strength requirements and demonstrates compliance with RoHS 3 (2015/863/EU) with exemption 6(a) for lead as an alloying element in steel, along with full REACH (EC 1907/2006) compliance for the latest SVHC list (01/17/2023, 233 substances). Dimensions include 3/8" width and 7/64" height for the thin profile configuration.