S-93126A150 2 1/4"-12 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking that maintains secure fastening even under intense operational stress
• High-temperature durability with nylon insert rated up to 250°F, ensuring reliable performance in heated industrial environments
• Exceptional corrosion protection from black-phosphate steel coating, extending service life in demanding conditions
• Enhanced installation efficiency with external hex drive and extra-wide thin profile for better tool engagement and torque application
• Precise thread engagement with Class 2B extra fine UN threads providing superior clamping force and reduced loosening risk
• Heavy-duty strength assurance meeting ASTM Grade C specifications for rigorous industrial applications
• Regulatory compliance confidence with REACH and RoHS 3 adherence, ensuring environmental and safety standards are met

Professional Applications & Engineering Value

This heavy-duty locknut is engineered to solve critical vibration-induced loosening problems in industrial machinery, construction equipment, and transportation systems. The high-temperature nylon insert creates consistent friction against mating threads, maintaining clamp load where standard nuts fail. The black-phosphate steel construction provides excellent corrosion resistance for outdoor or chemically exposed environments, while the extra fine UN thread with Class 2B fit ensures precise engagement for applications requiring fine adjustment and maximum security. The external hex drive with extra-wide thin profile allows for efficient installation in confined spaces with standard tools, reducing assembly time and improving maintenance accessibility in vibration-intensive applications.

Specification Summary & Compliance

This locknut features 2 1/4"-12 UN extra fine threads with Class 2B thread fit for precision engagement, right-hand thread direction, and meets ASTM Grade C strength requirements. Manufacturing complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) standards, ensuring environmental compliance and material safety. The nylon insert maintains locking performance up to 250°F maximum temperature with dimensions of 3 1/2" width and 1 15/16" height for the extra-wide thin hex profile.