The Jam Nut 1 1/4-12 Steel RH from FK Rod Ends is a precision fastening component designed for suspension and drivetrain applications where threaded rod ends and spherical bearings require positive locking. This right-hand jam nut prevents accidental loosening under vibration and cornering loads—a critical consideration for any serious suspension build, whether you're upgrading a performance street car, off-road rig, or competition vehicle.
Manufactured from hardened steel, the Jam Nut 1 1/4-12 Steel RH features a 1 1/4-12 thread specification, ensuring compatibility with conventional rod-end studs and spherical bearing assemblies. The right-hand (RH) designation confirms clockwise threading, which is essential for proper installation. At just 0.16 pounds, this compact fastener measures 2.75 x 0.9 x 2.8 inches, making it suitable for tight installation spaces.
This jam nut is essential for aftermarket control arm kits, adjustable tie-rod assemblies, and custom fabricated suspension geometries. Mechanics and fabricators rely on jam nuts to maintain consistent preload and alignment geometry after initial installation and adjustment. Installation requires snugging the primary nut first, then threading the jam nut against it to lock the assembly and prevent vibration-induced loosening.
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