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Expert
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Location: Chestertown, NY ( near Lake George) | On a 59 Dodge Coronet, what size is the brake line from the master cylinder to the Junction on the frame rail? Thanks, Shep |
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Exner Expert 10K+
Posts: 10465
Location: So. Cal | They use a hose to go from the master cylinder to the junction block. At the junction block, the connection is the same as is used on a standard 1/4" tube nut. The actual thread is 7/16"-24 on those. So if you are replacing that with a solid line, I recommend using a 3/16" line, but with a 7/16"-24 tube nut.
Edited by Powerflite 2025-11-19 3:48 PM
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Expert
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Location: N.W. Fla. | Hose is used because of possible flex between the body & frame may eventually cause a hard line to break..... |
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Expert
Posts: 3488
Location: Chestertown, NY ( near Lake George) | Helping friend over the phone, he's converting to a dual master, with 2 3/16 line ports, will that size fit into the hose junction. |
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Exner Expert 10K+
Posts: 10465
Location: So. Cal | Yes, as I stated before. However, the standard 3/16 tube nuts won't work in it. Standard 3/16 tube nuts are 3/8" - 24. But that junction block is 7/16"- 24. So you need to purchase those larger sized nuts to make it work. |
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Expert
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Location: Chestertown, NY ( near Lake George) | Yeh, thought so. Thanks |
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Extreme Veteran
Posts: 454
| Take a look at “agscompany.com”. Their website will give you a complete list of brake line fittings and thread sizes. Typically the 3/16 brake line uses an inverted flare fitting. As Powerflite stated there is a 3/8 and a 7/16 thread sizes used.
Del S |
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Expert
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Location: Chestertown, NY ( near Lake George) | Thanks, found it this am, good stuff, Napa doesn't know anything, their answer is go look thru the bins! |
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Brake line size
