Old-school mushroom "gennie" shift knob in solid black:

• 5/16"-24 UNF thread
• Also available in 3/8"-16, 3/8"-24, & 1/2"-13 - see separate listings
• 2" diameter, ~ 1.6" tall overall
• Made of scratch-resistant black phenolic resin with a brass threaded insert
• Jam nut included

• OE thread size for 1941-1978 Willys / Jeep CJ - 3 speed only
• WARNING: newer models and replacement shifters have larger thread size
• Do NOT assume your shifter is original - confirm thread size BEFORE YOU BUY!

• Appears to also fit some flathead Fords - check thread size