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CRES Fastener passivation

CRES Fastener passivation

CRES Fastener passivation

(OP)
Hello,

I am having difficult time finding information on common (commercially available) imperial sized fastener specifications and configurations.  Particularly with regard to CRES fasteners used in the USA.

Are CRES fasteners that are purchased 'off the shelf' normally passivated?  If not, is there a specification for prior to purchase fasteners that are passivated (maybe for the aerospace industry?).  I am trying to avoid having to create manufactured parts for hundreds of CRES screws/nuts/washers we use in various machine designs that may need to be passivated for various applications.

Also, if I am forced to specify a fastener and then a passivation process, what is the most common (to USA) passivation specification that I should reference?  I see that MIL-S-5002 is sometimes used, but when I looked it up that MIL spec is inactivated/cancelled.

Thank you much.

RE: CRES Fastener passivation

According to MIL-DTL-1222J DETAIL SPECIFICATION - STUDS, BOLTS, SCREWS AND NUTS FOR APPLICATIONS WHERE A HIGH DEGREE OF RELIABILITY IS REQUIRED; GENERAL SPECIFICATION FOR

3.6.4 Corrosion-resistant steels. Corrosion-resistant steel fasteners
shall be descaled, cleaned and passivated in accordance with ASTM A 380.



ASTM A 380 Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems

is available from ASTM International here:

http://www.astm.org

Regards,

Cory

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