S-93126A160 2 1/2"-12 Locknuts
Locknuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Temperature & Environment Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance through the nylon insert that maintains locking force under dynamic loads
- High-temperature performance with nylon insert rated for continuous service up to 250°F (121°C)
- Exceptional corrosion protection from black-phosphate coating that resists rust in demanding environments
- Precise thread engagement with Class 2B fit ensuring consistent torque values and reduced cross-threading risk
- Heavy-duty load capacity meeting ASTM Grade C specifications for demanding industrial applications
- Easy installation and removal with standard external hex drive and extra-wide thin profile for improved tool access
- Regulatory compliance with RoHS 3 and REACH standards for global market acceptance
Professional Applications & Engineering Value
This heavy-duty locknut solves critical vibration-induced loosening problems in industrial machinery, construction equipment, and transportation systems. The nylon insert creates consistent friction against mating threads, maintaining clamp load where ordinary nuts fail. The black-phosphate steel construction provides corrosion resistance without compromising the ASTM Grade C mechanical properties. With extra fine UN threads (2 1/2"-12), this locknut offers finer adjustment capability and superior load distribution compared to coarse-thread alternatives. The external hex drive and extra-wide thin profile enable efficient installation in confined spaces while providing ample bearing surface.
Specification Summary & Compliance
This locknut features 2 1/2"-12 UN extra fine threads with Class 2B thread fit for precision engagement. The dimensional specifications include 4" width across flats and 2 3/16" height. Manufactured to ASTM Grade C strength requirements, the component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC updates. The right-hand thread direction and external hex drive conform to industry standards for compatibility with common installation tools.
