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 MIL-HDBK-419A
Table 8-15
Characteristics of Conductive Gasketing Materials
Chief Limitations
Chief Advantages
Material
Not available in sheet (Certain
Most resilient all-metal gasket (low
Compressed knit ted wire
intricate shapes difficult to make).
flange pressure required). Most
Must be 0.40 inch or thicker.
points of contact. Available in
variety of thicknesses and
resiliencies, and in combination
with neoprene and silicon.
Not truly resilient nor generally
Best break-thru of corrosion
Brass or beryllium copper
reusable.
protection films.
with punctured holes
May result in larger size gasket
Combines fluid and rf seal. Can
Oriented wires in rubber or
for same effectiveness.
be effective against corrosion
silicon
films if ends of wires are sharp.
Very low resiliency (high flange
Combines fluid and conductive
Aluminum screen impregnated
pressure required).
seal. Thinnest gasket. Can be cut
with neoprene
to intricate shapes.
Cold flows, low resiliency.
Cheapest in small sizes.
Soft Metals
Foil cracks or shifts position.
Takes advantage of the resiliency
Metal over rubber
Generally low insertion loss yielding
of rubber.
poor rf properties.
Combines fluid and conductive
Practically no insertion loss, giving
Conductive rubber
very poor rf properties.
seal.
Best suited for sliding contact.
Easily damaged. Few points of
Contact Fingers
contacts.
8-48
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