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topic 0391

Replacement spec for Mil-C-26074 (electroless nickel)?

A discussion started in 1996 and continuing through 2016.
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Q. I have been informed by a customer that Mil-C-26074 [link by ed. to spec at TechStreet] (electroless nickel) is obsolete. If this is so, can someone tell me what the replacement documentation is. The same customer says AMS2404 [link by ed. to spec at TechStreet] or AMS2405 [link by ed. to spec at TechStreet], but he is not sure. Who publishes these?

Why haven't the people phasing out MIL specs gone to ASTM? My opinion is that ASTM reads similarly for many requirements but is more up to date.


bill vins
Bill Vins
microwave & cable assemblies
Mesa (what a place-a), Arizona 


A. Hi, Bill.

MIL-C-26074 is indeed obsolete, but they refer you to ASTM B607 [link by ed. to spec at TechStreet] for boron EN and ASTM B733 [link by ed. to spec at TechStreet] for phosphorous EN.

Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

Ed. note: Mil-C-26074 was later reinstated.


A. Mil-C-26074 [link by ed. to spec at TechStreet] is a current and still usable MS.

Albert J. Mendoza
- Riverside, California, USA

Ed. note July 2016: According to, the most recent version of this spec was cancelled in 2003.
"MIL-DTL-26074F is hereby cancelled. Previous users for Naval Nuclear Propulsion Program applications only should refer to MIL-DTL-32119 [link is to free spec at Defense Logistics Agency,]. Previous users of MIL-C-26074E should refer to SAE AMS-C-26074 [link by ed. to spec at TechStreet]."

November 14, 2012

Q. Does MIL-D-26074E exist? if so; what are all the differences w.r.t. MIL-C-26074E ?

ELECTRONICS - Bangalore, India

November 14, 2012

A. Hi Anil. I don't think there is or ever was a MIL-D-26074 -- my bet is it was just either a transposition typo or an error in abbreviating "DTL". As far as I can see, rev. E (from 1990) is still the current revision level. But there were cancelation and re-activation notices subsequent to that.


Ted Mooney,
Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

May 7, 2013

A. Mil-C-26074 is cancelled and AMS26074 also is cancelled AMS2404 is correct.

Gilbert Loy
- Anaheim, California, USA

July 2016

thumbs up signHi. This is all terribly confusing, with cancellations, re-instatements, re-cancellations, reference to ever-changing replacement specs, etc.

However, while I think Gilbert may have been correct in May of 2013, that he too became incorrect in October 2013 when revision D of SAE AMS-C-26074 [link by ed. to spec at TechStreet] was stabilized -- because neither the MIL cancellation notice, nor SAE AMS-C-26074 seems to make mention of a replacement for AMS-C-26074. However, AMS2404 [link by ed. to spec at TechStreet] does seem to remain a viable spec as well.

I guess this is what you call "the fog of peace" :-)


pic of Ted Mooney
Ted Mooney, P.E. RET
Pine Beach, New Jersey
Striving to live "Aloha"

July 18, 2016

Reading MIL-C-26074, I've noticed the thickness callouts are not specified if per side. At face value, Class C should grow a shaft by .003" (.0015" per side). However I seem to remember Class C growing a shaft by .0015" (.0007" per side) Can I get some clarification on this?

Sean David
- Denver, Colorado, United States

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