Table 5-1.—Hose Fitting Color and Material Code
Flared Fittings MIL-F-5509
Color
Material Code
Aluminum Alloy 2014 and 2024(1)
Blue
D (Optional)
Aluminum 7075(1)
Brown
W(T-73)
Steel
Black
Copper Based Alloys
Natural Cadmium
Plate if Applicable
Corrosion Resistant Steel
None
Class 304
J
Class 316
K
Class 347
S
Titanium Alloys
Gray
T
Flareless Fittings MIL-F-18280
Color
Material Code
AluminumAlloy 2014 and 2024
Green
D
Aluminum Alloy 7075
Brown
W(T-73)
Carbon Steel
Yellow (result of
Chromate treatment)
4130 Steel Forging
F
Stainless Steel
Natural Finish
Class 304
J
Class 316
K
Class 347
S
Titanium Alloy
Gray
T
NOTE
(1) Duplex steel may distort color of aluminum anodize.
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