Page 415 - Parker Catalog 4400 - Hose, Fittings and Equipment

Catalog 4400 US Technical

Determining the Thread Type

In general of the threads of various fittings look similar and hinder the easy identification of the thread. To assure
the correct identification, the threads must be measured and compared to the tables listed in the following section.

A A

Thread Gauge

Using a thread gauge, the number
of threads per inch can be deter-
mined. Holding the gauge and
coupling threads in front of a lighted
background helps to obtain an ac- B
curate measurement.

Caliper Measure
A vernier caliper should be used
to measure the thread diameter of
the largest point. (Outside diameter
(O.D.) of male threads – Inside Di- C
ameter (I.D.) of female threads.)

D

E

E-21