MIL-PRF-370J
TABLE I. Type A, B, and D hose diameters and tolerances.
Size code Inside diameter (in.) Outside diameter (in.)
0.50 ± 0.03
1.06 ± 0.03
01
0.75 ± 0.03
1.37 ± 0.03
02
1.00 ± 0.06
1.62 ± 0.06
03
1.25 ± 0.06
1.87 ± 0.06
04
1.50 ± 0.06
2.12 ± 0.06
05
2.00 ± 0.06
2.66 ± 0.06
06
2.50 ± 0.06
3.19 ± 0.06
07
3.00 ± 0.06
3.75 ± 0.06
08
4.00 ± 0.06
4.75 ± 0.06
09
6.00 ± 0.06
6.87 +0.12/-0.06
10
3.3.1.2 Type C hose size and weight. Type C hoses shall conform to the size and weight
requirements in table II.
TABLE II. Type C hose diameter, tolerance, and weight.
Size code Inside diameter (in.)
Weight (lb/ft) 1/
2.06 ± 0.06
06
0.5, maximum
3.06 ± 0.06
08
0.75, maximum
4.06 ± 0.06
09
1.0, maximum
6.06 ± 0.06
10
1.5, maximum
1/ lb/ft = pounds per foot
3.3.2 Length. The length of hose and hose assembly shall be the actual hose length
exclusive of the end fittings. The tolerance on the length shall be ±2 percent (%).
3.3.3 Tube and cover. The tube shall be of petroleum-resistant compounds (see 3.4.2) and
shall be smooth, free of defects (e.g., holes, pitting, blisters, etc.), and of a uniform thickness.
The cover shall be of petroleum-resistant compounds (see 3.4.2) and shall be free of defects
(e.g., holes, pitting, blisters, etc.) and be ultraviolet-stable and ozone-resistant. The tube and
cover shall meet all the performance requirements as specified herein.
3.3.4 Static bond. Unless otherwise specified (see 6.2), the hose shall contain a continuous
embedded static wire(s) or other electrical conductor(s). The conductor(s) shall provide a
continuous electrical bond between the hose ends to include fittings. The maximum resistance
shall not be greater than 1.5 ohms per linear foot of hose. The bond shall not break when the
hose is coiled, sharply bent, or subjected to internal or external pressures as specified.
3.3.5 End fittings. End fittings shall be as identified by class, style, and material and sized
for the hose size specified. Non-corrosive devices (see 6.4) shall be used for the attachment of end
fittings to the hose. All end fittings shall be securely attached to the hose to prevent slippage or
leakage under normal operation and when subjected to hydrostatic proof pressure. Unless
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