Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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Mil-std 171
Q. Need to find out what mil-std 171 para 1.1.2.2 or 1.1.3.2 what kind of plating is this.
Thanks,
job shop machining - Louisville, Kentucky, USA
2004
A. These finish designations are both electroplated cadmium per QQ-P-416. Finish 1.1.2.2 is Type II, Class 2, 0.0003 inch (7.6 microns) thick, chromated normal color (not bleached or clear). Finish 1.1.3.2 is Type III, Class 2, 0.0003 inch (7.6 microns) thick, phosphated. Both items note "See 5.1.3.3" which is unclear to me. Perhaps your cadmium plater or someone else on this site can explain further. You can download and QQ-P-416F (superseded by AMS AMSQQP416) from the Defense Department's ASSIST site: http://assist1.daps.dla.mil/quicksearch/
- Goleta, California
Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.
2004
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Ed. note: The ASSIST site moved many times over the years so we are now employing active macros to direct readers to the current specifications.
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