Page 377 - Catalog4400.pdf

E-19 Hose Products Division
Parker Hannifn Corporation
Wickliffe, Ohio
www.parkerhose.com
Technical Catalog 4400 US
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Determining the Thread Type
Thread Gauge
Using a thread gauge, the
number of threads per inch can
be determined.
Holding the gauge and coupling
threads in front of a lighted back-
ground helps to obtain an accu-
rate measurement.
Caliper Measure
A vernier caliper should be used
to measure the thread diameter
of the largest point. (Outside di-
ameter (O.D.) of male threads –
Inside Diameter (I.D.) of female
threads.)
Matching Angle with O-ring
These fttings combine the
functionality of both the matching
angle seal with the O-ring.
The O-ring is in the angled seal-
ing surface of the ftting so that
when the threaded male and
female are screwed together the
sealing surfaces wedge together
and at the same time deform the
O-ring between them.
In general of the threads of various fttings look similar and hinder
the easy identifcation of the thread. To assure the correct identif-
cation, the threads must be measured and compared to the tables
listed in the following section.