1/2"-20 Shift Knob Jam Nut for all 1965-1967 3-Speed Mustangs and 1965-1969 4-Speed Mustangs.With the addition of a new CJ Shift Knob, a jam nut is required for proper installation onto your shift handle. Without a jam nut it is almost impossible for the new shift knob to naturally tighten on the handle and to be properly aligned at the same time.
Features the correct 1/2"-20 thread pattern for your 65-67 3-speed or 65-69 4-speed Mustang.
*CJ Shift Knobs do not include a jam nut.
Please Note: Most early model original style shift knobs already use a jam nut, therefore you may reuse your existing jam nut for your new CJ Shift Knob.
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