[Diy_efi] GM TPI fuel lines/rails and Saginaw fittings

[Shannen Durphey]

http://www.diy-efi.org/list_search.html
Search 97, 98, 99.
subject: fittings
title "fuel line fittings" is one of a few that contain info.

There is at least one and maybe more updates to that post.

Shannen


"Marteney, Steve" wrote:
> 
> FWIW - I think I solved my own problem, but all I have is logic and little
> bit of research, but nothing that says this is what it is.  It appears the
> 5/16" Saginaw is the same thing as a 14mm x 1.5 Saginaw as well as a 3/8"
> Saginaw being the same as a 16mm x 1.5.  After doing some research, I
> reconcile that the 5/16 and 3/8 nomenclature is a lot like the AN -X
> nomenclature.  A -6AN fitting really doesn't specify anything except the max
> O.D. of the hose/line (6/16 of an inch).  Likewise, in the Saginaw
> nomenclature, 3/8" specifies the O.D. of the incoming hose/line since no
> part of the thread dimensions comes anywhere close to 5/16".
> 
> Now, the Saginaw fittings are also specified as M16 x 1.5 metric fittings
> (or M14).  According to the Machinist's Handbook, the M nomenclature
> indicates an M16 would have a 16mm major diameter, where major diamter, in
> millimeters, is majored from outer thread to outer thread on a male type
> fitting.  The x 1.5 indicates the thread pitch, distance from one thread
> peak to an adjacent thread peak, also in millimeters.  Some rough caliper
> measurements seem to confirm this.
> 
> Furthermore, which most everyone knows, the Saginaw fitting has an o-ring at
> the tip of the male fitting and a mating recess in the female fitting.
> 
> Am I on track?
> Steve
>

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