DRAFT
TM 5-4210-249-13&P-4
0609
b.
Hoses and Fittings.
HL0570
HL0571
NOTE
Most fluid piping system sizes are measured by dash numbers. These are universally
used abbreviations for the size of the component expressed as the numerator of the
fraction with the denominator always being 16. For example, a -04 port is 4/16 or 1/4-inch.
Dash numbers are usually nominal (in name only) and are abbreviations that make
ordering of components easier.
1.
Measure the I.D./O.D. diameter with a caliper as shown.
2.
Under the heading MALE THREAD O.D. and FEMALE THREAD I.D., match the measurements with the
row in table to determine proper torque.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
HL0572
3.
To find the sealing surface angle, use a protractor and measure the sealing surface parallel to the
centerline of the fitting.
0609-4