Classic round Hurst logo shift knob as found in discontinued retail #1631402:

• 1 7/8" round ball of colored thermoset resin, polished
• SMALL size for classic Hurst shifters; NOT the larger 2 1/8" some expect!
• Hurst logo (lapel pin) embedded within a clear layer of cast resin on top
• Plain sides, no logo
• Recessed brass mount w/ M16 x 1.50 thread
• Sale optionally includes ONE adapter to smaller thread size
• Refer to the thread guide for more info
• Jam nut of specified size included
• WARNING: jam nut MUST be used; knob will break if mounted w/o nut!

Regardless of your application, confirm thread size BEFORE purchase