MIL-DTL-52525/17C
TABLE IV. Material and finish identification codes. 1/ 2/
PIN code
material/plating
Material
Plating finish
finish
A
Anodize in accordance with MIL-A-8625, type II.
Anodize in accordance with MIL-A-8625, type II and NAVAIR
Aluminum alloy 6061
trivalent chromium pretreatment (TCP) in accordance with
AN
or 7075
MIL-DTL-81706, type 2, class A.
Bare aluminum with NAVAIR TCP in accordance with
BN
MIL-DTL-81706, type 2, class A.
Cadmium plating in accordance with SAE-AMS-C-81562, type II,
C
class 3 or SAE-AMS-QQ-P-416, type II, class 2.
Steel
Cadmium plating in accordance with SAE-AMS-C-81562, type II,
class 3 or SAE-AMS-QQ-P-416, type II, class 2 and NAVAIR
CN
TCP in accordance with MIL-DTL-81706, type 2, class A.
Cadmium plating in accordance with SAE-AMS-C-81562, type II,
YC
class 3 or SAE-AMS-QQ-P-416, type II, class 2.
Chrome-molybdenum
Cadmium plating in accordance with SAE-AMS-C-81562, type II,
steel alloy 4130
class 3 or SAE-AMS-QQ-P-416, type II, class 2 and NAVAIR
YN
TCP in accordance with MIL-DTL-81706, type 2, class A.
F
Steel
NAVAIR TCP in accordance with MIL-DTL-81706, type 2, class
Chrome-molybdenum
A.
FN
steel alloy 4130
G
Steel
Zinc plating with colorless passivate in accordance with
Chrome-molybdenum
ASTM B633, type V, Fe/Zn 25.
YG
steel alloy 4130
H
Steel
Zinc phosphate finish in accordance MIL-DTL-16232, type Z,
Chrome-molybdenum
class1. 3/
YH
steel alloy 4130
Zinc plating with chromate conversion in accordance with
J
Steel
ASTM B633; type II or III, Fe/Zn 5, or ASTM B695, type II, class
Chrome-molybdenum
YJ
5.
steel alloy 4130
Nickel-copper alloy
K
No additional finish.
UNS N04400
High-chromium nickel
M
No additional finish.
alloy UNS N06690
N
Steel
Zinc aluminum in accordance with ASTM F1136, grade 3, NC.
Chrome-molybdenum
YN
steel alloy 4130
P
Steel
Zinc plating with colorless passivate in accordance with
Chrome-molybdenum
ASTM B633, type VI, Fe/Zn 5.
YP
steel alloy 4130
No additional finish. Passivation in accordance with
S
Corrosion resistant
SAE-AMS2700, type 6 or 7.
steel
Passivation above and NAVAIR TCP in accordance with
SN
MIL-DTL-81706, type 2, class A.
T
Titanium
Anodize in accordance with SAE-AMS2488, type 2.
V
Steel
Zinc-nickel in accordance with SAE-AMS2417, type 1.
W
Steel
Any zinc plating above.
Chrome-molybdenum
YW
steel alloy 4130
Z
Steel
Any zinc plating above with NAVAIR TCP in accordance with
Chrome-molybdenum
MIL-DTL-81706, type 2, class A.
YZ
steel alloy 4130
1/ All materials and finishes shall be in accordance with MIL-DTL-52525.
2/ Embitterment test need not be run.
3/ Zinc phosphate finish is hexavalent chromium free.
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