03 ford ranger 4.0 L spark plug thread type

Hi there i have 03 ranger 4.0L Iam just wondering the thread type is for the spark plug metric or standard any help would be greatly appreciated

http://www.autopart.com/tools/toolsmain/tool/T_2361.htm
The 14mm end is what you need most parts stores carry these. Put a little grease on the end to collect any chips.

Hi there i got all of the old spark plugs out and all of the new ones went in ok except for one it just keeps spinning in the hole when i try to tighten with ratchet and socket i can not spin it out with my fingers just wondering what i can do to fix this problem

Hi there i got all of the old spark plugs out and all of the new ones went in ok except for one it just keeps spinning in the hole when i try to tighten with ratchet and socket i can not spin it out with my fingers just wondering what i can do to fix this problem
http://www.autopart.com/tools/toolsmain/tool/T_2340.htm
This is a cheap kit to fix damaged spark plug holes. The picture doesn't show it but they normally have a bar which is tapered you hammer on the end so the plug doesn't leak. EBAY sells kits and many parts stores.
Use grease on the reamer tap to catch shavings. Some kits have a hose that fits on a shop vacuum. Pull the camshaft sensor wire and crank engine to blow out chips. Make sure valves are closed when tapping. Use red silicon on insert threads and anti seize on plug threads. Use 100,000 mile plug in this hole.
Some independent shops do this for around $100.00.
Try Advanced auto for a kit. Be very careful to start the reamer tap properly.