Questions about military finishing spec. MIL-STD-171?

A. Hi Lisa,

Sorry for the delay in posting your question, but maybe in the meanwhile you've read on down the page to where Chris Jurey gave us this:

That standard is currently at https://quicksearch.dla.mil/qsDocDetails.aspx?ident_number=35549,
and Table II on page 13 describes the finishes. Here's a screen capture: Luck & Regards,

A. Go to the assist quicksearch website at http://assist.daps.dla.mil/quicksearch/ ⇩

You should find the spec there. I think the latest revision is revision E.

Ed. note: That site seems to move every year or two. The current location (May 2025) is https://quicksearch.dla.mil/, and the current version is F.

A. TABLE II. Inorganic finishes, metallic coatings.
+
1.1 Cadmium coatings
1.1.2 Plating, w-P-416, type II, with supplementary chromate treatment; normal color: not bleached or clear (see 5.1.3.3)
1.1.2.3 Class 3, 0.0002 inch (5.1 um) thick
1.9 Zinc coatings

1.9.2 Electrodeposited zinc, ASTM B633, type II with supplementary chromate treatment; normal color: not bleached or clear (see 5.1.3.3)

1.9.2.3 Class 3, 0.0002 inch (5.1 um) thick

A. Hi, Rebecca.

I'm not sure that I understood the question, but Finish No. 7.3.1 is "Chemical film, chromate, MIL-DTL-5541 [⇦ this spec on DLA] or ASTM B449
Type II, Class 1A, for maximum protection against corrosion, painted or unpainted".

Regards,