Sump Plug Thread Size Chart

Sump Plug Thread Size Chart

This sump plug thread size chart helps you quickly identify the correct oil drain plug thread size used by different vehicle manufacturers when replacing a sump plug or installing a magnetic drain plug.

When replacing an oil drain plug with a magnetic sump plug, it is essential to choose the correct thread size for your vehicle. Oil drain plugs are manufactured in several different thread sizes and pitches, and selecting the wrong size can lead to oil leaks or damaged sump threads.

The chart below lists some of the most common sump plug thread sizes used by vehicle manufacturers including BMW, Audi, Volkswagen, Ford, Toyota and many others. It can be used as a quick reference when identifying the correct oil drain plug size or when upgrading to a magnetic sump plug during an oil change.

If you are unsure which sump plug thread your vehicle uses, the table below should help you identify the most common sizes and their typical applications.

PLUG Thread Diameter Thread Pitch Thread Length inc washer Thread length inc Magnet Head Size
AP-01 1/2” 20 14mm 16mm 14mm
AP-02 14mm 1.5 10mm 12mm 17mm
AP-03 12mm 1.25 10mm 12mm 15mm
AP-04 12mm 1.75 16mm 18mm 15mm
AP-05S 18mm 1.5 9mm 10mm 26mm
AP-06 14mm 1.25 11mm 13mm 19mm
AP-07 20mm 1.5 13mm 15mm 26mm
AP-08 14mm 1.5 18mm 20mm 19mm
AP-10 16mm 1.5 11mm 13mm 26mm
AP-11 12mm 1.5 16mm 20mm 17mm
AP-17 5/8” UNC 22mm 24mm 24mm
AP-18 3/4″ UNF 24 8mm 11mm 24mm
AP-22 22mm 1.5 13mm 15mm 26mm
AP-24 24mm 1.5 11mm 13mm 32mm
AP-26 26mm 1.5 11mm 13mm 17mm
IP-03X 3/8 NPT 3/8 NPT 13mm 16mm 19mm
IP-04 1/2 NPT 1/2 NPT 12mm 13mm Internal Hex
IP-04X 1/2 NPT 1/2 NPT 13mm 15mm Square External Head
IP-06X 3/4 NPT 3/4 NPT 12mm 15mm Square External Head
MP-01 12mm 1.5 12mm 15mm 17mm
MP-02T 14mm 1.5 13mm 15mm 13mm
MP-05 14mm 1.25 10mm 12mm 19mm
MP-06 12mm 1.25 16mm 21mm 16mm
MP-07 10mm 1.5 16mm 18mm 16mm
MP-10 18mm 1.5 10mm 12mm 19mm
MP-12 10mm 1.25 9mm 11mm 16mm