A-A-59567/7
Length of hose assembles. Length of hose assembles shall be measured in feet in accordance with
A-A-59567. Examples: 080 for 80 feet and 250 for 250 feet.
Construction. Unless otherwise specified, coupling parts shall be in as specified herein. The coupling
shall be cast or machined from aluminum, copper alloy (brass), steel, polypropylene, or corrosion
resistant steel, (see table II and figure 1):
Tightening provisions. Female hex shall be a swivel nut.
Couplings. Couplings when attached to hose shall be able to withstand an internal hydrostatic pressure
of 100 psi, for at least one minute without showing any signs of leakage.
Materials. Couplings shall be cast, machined, pressed or extruded from one of the materials in table II.
TABLE II. Material types and designator.
Material
designator
Material
code
A
Aluminum anodized
B
Copper alloy (brass)
C
Steel zinc plated
S
Corrosion resistant steel
Threads. Threads shall be NPT (national pipe thread) in accordance with FED-STD-H28/7, NPSH
(National Pipe Straight Hose) in accordance with FED-STD-H28/10, NH (fire hose coupling) in
accordance with FED-STD-H28/10, NPSM (national pipe straight mechanical) in accordance with
ASME B1.20.1 or GHT (garden hose thread ) threads see table III.
TABLE III. PIN codes for style, class, and type.
PIN
Hose clamp
Ferrule designator
type
Thread type
type designator
(see table IV)
designator
(see figure 2)
7G
GHT 1/
7H
NH 2/
7M
NPSM 3/
A, B, C, D, E, or F
CA, R, or Z
7S
NPSH
7T
NPT
1/ Not compatible with other thread types. GHT thread size .750 only for
hose assemblies sizes ID .250 thru .750.
2/ Not compatible with other thread types. For hose assemblies sizes ID
.750 and up.
3/ Not compatible with other thread types.
Gasket. Hose assemblies shall come with a gasket. Gasket material shall be suitable for the hose class
for which it is intended, non-potable water or potable water.
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