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Old 02-08-2021, 03:24 PM   #9
bbrocksr
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Join Date: May 2010
Location: Yakima Washington
Posts: 913
Default Re: Grease fitting size for 1937 ford spindles

Quote:
Originally Posted by DavidG View Post
Kurt is correct, they are pipe threads, not 1/4-28 keeping in mind that the fitting has seal against leakage. They are so close to one another that it is easy to mistake one for the other.
I,m going to have to disagree with you 1/4-28 is .250 in diameter, 1/8 pipe is close to .400 in diameter. They are nowhere close.
1/8 pipe and 3/8-24 are the one that are close.
I just finished putting kingpins in a pair of 37 spindles and they are 1/4-28.
I have 3 more sets and they are 1/4-28.
Compare a 1/8 pipe fitting and a 1/4 bolt to see the difference.

Bill
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