New-Old-Stock

Genuine

VINTAGE

Champion Spark Plug

# 686

N-1

Thread diameter: 14mm

Thread reach: 3/4"

Seat type: Flat Gasket

Hex size: 15.9mm (5/8")

Tip configuration: Nickel

Construction: Standard

Terminal type: M4 Thread

Fits many Snowmobile, Motorcycle, Auto, Small Engines.