Stainless Works O2 Bung Plug

Hex head plug for O2 bung, CNC machined from stainless steel ,1-1/8″ OD, 3/4″ hex with M18 x 1-1/2″ threads x 1″ overall length for sealing off O2 bung when not using a O2 sensor, or capping a O2 bung for tuning.