Silikal@aol.com wrote:
>
> NTP (National Taper Pipe?) uses an intereference-fit tapered
> thread which will self-seal when threaded (Teflon(r) sealant
> highly recommended). IMS, BSP (British Straight Pipe) uses
> straight threads and crush washers to give a seal.
>Actually, it's NPT (National Pipe Thread)
AN (Army/Navy) uses precision-machined fittings to provide
> a self-sealing angled face joint.AN is available in a number of
>configurations, but principally conforms
to hydraulic specifications, which can include straight-thread o-ring,
and swivel fittings. It's primarily a standard for materials and
tolerances as they apply to fittings.
>
> For those thinking of plumbing brake systems with SS braided
> hose, the AN fittings use a 37 degree flare, while the standard
> flare for brake lines is 45 degrees. Most race shops sell adapter
> fittings, Carroll Smith also mentions an AN-spec "crush washer"
> from Earl's that may be used to mate the different angles.
> To further narrow down one's search, 37 deg. are generically known as JIC
(for Joint Industry Council), while 45 deg. are known as SAE (for, as
most know, Society of Automotive Engineering). Some intermediate
fittings are available which have machined dual faces and can be used
with both angles, but I have not had occasion to use them.
Cheers.
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