MS3186G
REQUIREMENTS:
Design and construction: See figure 1 and tables I and II.
The hex nut shall be the same material and finish as the applicable connector. Materials:
A: Heat treatable wrought aluminum (for use on aluminum shell connectors).
C: CRES in accordance with ASTM-A484/A484M or ASTM-A582/A582M (for use with CRES shell connectors).
S: Plated steel, cold rolled, in accordance with ASTM-A108. Finish:
A: Anodic coating, color black, in accordance with MIL-A-8625.
8: Cadmium over corrosion resistant steel, color black, in accordance with SAE-AMS-QQ-P-416.
C: Cadmium, color clear, in accordance with SAE-AMS-QQ-P-416, Type II, to withstand 96 hours salt spray.
D: Pure dense electrodeposited aluminum in accordance with MIL-DTL-83488, Type II, to withstand
500 hours dynamic salt spray. Color shall be non-reflective and shall meet the requirements as specified herein.
E: Electrodeposited nickel in accordance with SAE-AMS-QQ-N-290, class 2, .0001 to .0002 inch
(0.003 to 0.005 mm) minimum thickness.
N: Electroless nickel in accordance with SAE-AMS-C-26074 or ASTM-8733 (space applications only).
Use of a suitable underplate is permissible.
T: Tin plate in accordance with ASTM-8545 over nickel in accordance with SAE-AMS-QQ-N-290. Tin application process shall inhibit whisker growth. Tin content shall not exceed 97% by mass and shall be alloyed with a minimum of 3% lead, by mass.
P: Passivate.
M: Nickel fluorocarbon polymer. Nickel with fluorocarbon polymer additives over a suitable underplate to withstand 500 hours dynamic salt spray. Color shall be non-reflective and shall meet the requirements as specified herein.
W: Cadmium over nickel underplate, color olive drab, in accordance with SAE-AMS-QQ-P-416.
Z: Zinc-nickel alloy in accordance with ASTM-8841, over a suitable underplate to withstand 500 hours dynamic salt spray. Color shall be black, non-reflective and shall meet the requirements as specified herein.
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