Butler 1/4" Pipe Plug, Steel PIO-PP567

1/4" NPT steel pipe plug with an internal hex drive.

Measure the port before ordering. Butler stocks the same plug in 1/8", 1/4", 3/8" and 1/2" NPT, and blocks pick up assorted pipe plugs over their lives at accessory, gauge and oil ports that vary by year, application, and whatever the last builder did.