Under the definition of Special processes are the surface and thermal treatments needed by the part (or the assembly).

All these processes are performed by qualified sub-suppliers (click Read more for a full list)

MIL-A-8625 anodization 

Precipitation hardening of steels

Ionic nitriding

MIL-C-5554 Chromate coating

Phospate coating

Zinc plating 

DLC coating

Painting

Nickel coating

Copper coating

Silver plating

Gold plating

Teflon coating

X-Ray

Ultrasonic test

Penetrant liquid inspection