3
4270 Series Electrically
Conductive Connector Covers
BT 0806-1101
Nov 2001
Technical Information
Conductive Composite
3M™ 4270 Series Connector Covers feature a
new unique Conductive Composite material. The
material is made intrinsically conductive by
uniformly distributing a conductive matrix of
fibers during compounding. The covers are
permanently volume conductive and free of
carbon black particulate. The 4270 Series
Covers do not leave black marks and are
more suited to clean situations.
Noncorrosive
4270 Series Connector Covers are
noncorrosive and produce no visible
corrosion when tested to Federal
Test Method 101C using Kovar test
plates.
Military Application
Conformability
4270 Series Circular Connectors Covers were
designed to meet the requirements and intentions
of MS90376, and MIL PRF 5501/31A or 32A.
Prominent military contractors have qualified
these materials to their own specifications and are
encouraging their use.
The material used in the covers were also selected
for its resilience. Properly sized, the covers
provide a snug, secure fit. This helps keep
connectors clean and prevents the cover from
accidentally falling off.
BT 0806-1101
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Material Properties
Property
Chemical Susceptibility
Test Method
Resistivity
Contact Corrosivity
Metod 3005
(Kovar plate)
Crayoning
Elongation
Tensile
Vicat Softening
Out Gassing
Typical Value
5
ASTM D991
FTM 101C
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