3MTM Connector Covers
See page 2 for sizes
Circular and “D” Type Conductive Covers
3M Connector Covers are made of an intrinsically conductive composite material with uniformly distributed fibers. This makes the cov-
ers free of carbon black particulate and better suited to clean situations. The covers do not leave black marks and are permanently
conductive.
3M™ Circular Connector Covers 4270 Series
3M “D” Type Connector Covers 4272 Series
4270 Series were designed to meet the requirements
and intentions of MS90376,and MIL PRF 5501/31A or
2A. Military contractors have qualified these materials to
their own specifications and are encouraging their use.
4272 Series were designed to meet the requirements
and intentions of MIL-PRF-5501. Military contractors
have qualified these materials to their own specifications
and are encouraging their use.
Specifications
Typical Properties:
Chemical Reactions
Resistivity
ASTM D991
FTMS 101C
Method 3005
3M
ASTM D638
ASTM D638
ASTM MD
E595
<105 ohm-cm
Pass
Dilute Acids
Slight Attack
Slight Attack
Severe Attack
Severe Attack
Resistant
Contact Corrosivity
(Kovar plate)
Crayoning
Elongation
Tensile
Vicat Softening
Outgassing ASTM
Dilute Alkalines
Concentrated Acids
Concentrated Alkalines
Methanol, Ethanol, and
Not visible
25%
1500 PSI (1.0 x 107 N/m2) Isopropanol
1525 205°F (96OC)
Pass
Hydrocarbons
Ketones
Oil and Gasoline
Slight Attack
Dissolves
Severe Attack
P
R
O
D
U
C
T
D
A
T
A
S
H
E
E
T
3M is a trademark of 3M Company.
All other trademarks herein are the property
of their respective owners.
3M Electronics Solutions Division
6801 River Place Blvd
4270 and 4272 Series Connector Covers
Austin, TX 78726-9000
ITEM NUMBER
PRODUCT
DATASHEET
US and Canada: 866-722-3736
Fax: 866-722-3735
CONDUCTIVE CONNECTOR COVERS
SEE TABLE
4270
Intl: 919-718-0000; Fax: 919-774-8174
email: 3Mstaticinfo@mmm.com; www.3Mstatic.com