MIL-DTL-83796/2C
TABLE III. Nut and nipple material and finish code. 1/
Material and
Material
Plating Finish
finish code
Cadmium plating in accordance with
Steel (sizes -3, -4, and -5)
SAE-AMS-C-81562, type II, class 3 or
Blank
SAE-AMS-QQ-P-416, type II, class 2.
Aluminum (sizes -6 and above)
Anodize in accordance with MIL-A-8625, type II
Aluminum-nickel in accordance with
A
Steel (sizes -3, -4, and -5)
ASTM F1136/F1136M, grade 3, NC
Anodize above with NAVAIR trivalent chromium
B
Aluminum (sizes -6 and above)
pretreatment (TCP) in accordance with MIL-DTL-81706,
type II, class 1A.
Cadmium plating in accordance with
SAE-AMS-C-81562, type II, class 3 or
CN
Steel (sizes -3, -4, and -5)
SAE-AMS-QQ-P-416, type II, class 2 with NAVAIR TCP in
accordance with MIL-DTL-81706, type II, class 1A.
Zinc phosphate finish in accordance MIL-DTL-16232 type
H
Steel (sizes -3, -4, and -5)
Z, class1 2/
Zinc plating in accordance with ASTM B633; type II or III,
J
Steel (sizes -3, -4, and -5)
Fe/Zn 5, or ASTM B695, type II, class 5
N
Steel (sizes -3, -4, and -5)
NAVAIR TCP above.
Zinc plating in accordance with ASTM B633; type VI,
R
Steel (sizes -3, -4, and -5)
Fe/Zn 5.
No additional finish. Passivation in accordance with
S
Corrosion resistant steel
SAE-AMS2700, method 2
T 3/
Titanium (all sizes)
Annealed
V
Steel (sizes -3, -4, and -5)
Zinc-nickel in accordance with SAE-AMS2417, type 1
Z
Zinc any type above
PIN code F, G, H, J, R, V
PIN code F, G, H, J, R, V with NAVAIR TCP in
ZN
Zinc any type above
accordance with MIL-DTL-81706, type II, class 1A.
1/ Shall be capable of withstanding minimum of 96 hours salt spray.
2/ Hexavalent chromium free.
3/ Titanium shall not be used in oxygen systems.
Trivalent wrenchability. When the finish has been damaged due to poor wrenchability, the surface of
the connector shall be touched up using the brush plating process below. The term "trivalent
wrenchability" is used to evaluate the ability of the finish to withstand abrasion from an excessive
amount of wrenching.
a. Brush plating of hard chromium by electrodeposition shall be in accordance with
SAE-AMS2451/5.
b. Brush plating of medium-hardness, low stress nickel by electrodeposition shall be in
accordance with SAE-AMS2451/9.
c. Brush plating of NAVAIR TCP shall be in accordance with MIL-DTL-81706, type II, class 1A,
material form 1 through 6, application method B. Example of a PIN: M817062A6B.
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