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tonight's question Tap size

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JPSmit

JPSmit

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I have to chase the captive nuts for the front of the rear springs - just to confirm, I bought a 5/16 X 24NF -did I do right?

too cold to go outside to work anyway (-17c 1f) brrr
 
What is the Captive Nut?

Forgive me. The four Bolts that hold the front Spring Plate to the floor are 3/8 and the the front sprint bolt is 7/16 I believe. Not sure what other you are refferring too?
 
I mean the plate that attaches the front of the (rear leaf) spring to the floorboards - two bolts from the top/ two from the bottom. The captive nuts I'm referring to are the ones on the body of the car ie the bolts from the bottom up.

Don't think they are 3/8 though
 
i would think they are 3/8
most likely 3/8-24
 
thanks - and I realized that pretty quick today. Bought the tap for chasing the threads - any advice other than oil?
 
1/4 turn forward back up 1/4 turn forward back up. Should be pretty straight forward. Unless the threads have been exposed to the elements for some time, should be rather easy.
 
Note to self - chase the threads before you try to mount the rear springs and the 45 minute job will actually take 45 minutes and not 4+ hours. Especially chase the threads if the car had been media blasted/ the underside painted or it's been on the road in the last 50 years.

Don't ask me how I know /bcforum/images/%%GRAEMLIN_URL%%/smile.gif

PS I was stunned at the amount of c**p that came out.
 
I had my car media blasted and after vacuming it hundreds of times I still get particles coming out of strange areas each time I drive
 
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