3
4270 Series Electrically
Conductive Connector Covers
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
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.
Conformability
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.
Material Properties
Property
Resistivity
Contact Corrosivity
Test Method
ASTM D991
FTM 101C
Metod 3005
(Kovar plate)
3M
ASTM D638
ASTM D638
ASTM MD 1525
ASTM E595
Typical Value
<10
5
ohm-cm
Pass
Chemical Susceptibility
Chemical
Dilute Acids
Dilute Alkalines
Concentrated Acids
Concentrated Alkalines
Methanol, Ethanol, and
Isopropanol
Hydrocarbons
Ketones
Oil and Gasoline
Reactions
Slight Attack
Slight Attack
Severe Attack
Severe Attack
Resistant
Slight Attack
Dissolves
Severe Attack
Crayoning
Elongation
Tensile
Vicat Softening
Out Gassing
Not visible
25%
1500 psi
96
o
C
Pass
Model 4270 Circular Cover
3M Logo
Mil-129H
Symbol
“A”
“C” “D”
Product Description
Model
Number
“B”
Old Prod. Desc.
“A”
1.406
1.465
1.500
1.590
1.640
1.700
1.810
1.875
1.950
2.125
2.220
2.340
2.435
2.600
2.660
2.875
2.960
3.125
3.225
“B”
.625
.562
.625
.562
.625
.562
.625
.625
.562
.625
.562
.625
.600
.625
.600
.625
.600
.625
.600
“C”
1.150
1.231
1.270
1.340
1.390
1.463
1.540
1.645
1.715
1.890
1.965
2.140
2.215
2.380
2.440
2.630
2.720
2.880
2.960
“D”
1.215
1.301
1.340
1.410
1.460
1.533
1.580
1.718
1.790
1.970
2.040
2.210
2.290
2.450
2.530
2.700
2.812
2.950
3.050
Product Description
Old Prod. Desc.
“A”
.670
.670
.670
.670
.740
.750
.750
.840
.860
.970
1.031
1.125
1.125
1.220
1.250
1.330
1.400
“B”
.500
.500
.500
.625
.500
.500
.625
.500
.625
.500
.625
.500
.625
.500
.625
.562
.562
“C”
.250
.313
.375
.413
.480
.500
.530
.605
.655
.720
.785
.850
.893
.973
1.28
1.093
1.125
“D”
.336
.399
.461
.483
.540
.586
.595
.665
.715
.755
.845
.905
.963
1.035
1.088
1.155
1.213
Packaged 100/bag; 10 bags/box
4270 M5501-31A-250
4270-4R
4270 M5501/31A-313
4270-5R
4270 M5501/31A-375
4270-6R
4270 M5501/31A-413
4270-8Y
4270 M5501/31A-480
4270-8R
4270 M5501/31A-500
4270-9R
4270 M5501/31A-530
4270-10Y
4270 M5501/31A-605
4270-10R
4270 M5501/31A-655
4270-12Y
4270 M5501/31A-720
4270-12R
4270 M5501/31A-785
4270-14Y
4270 M5501/31A-850
4270-14R
4270 M5501/31A-893
4270-16Y
4270 M5501/31A-973
4270-16R
4270 M5501/31A-1028
4270-18Y
4270 M5501/31A-1093
4270-18R
4270 M5501/31A-1125
4270-19R
Packaged 50/bag; 10 bags/box
4270 M5501/31A-1150
4270-20Y
4270 M5501/31A-1231
4270-20R
4270 M5501/31A-1270
4270-22Y
4270 M5501/31A-1340
4270-22R
4270 M5501/31A-1390
4270-24Y
4270 M5501/31A-1463
4270-24R
4270 M5501/31A-1540
4270-25Y
4270 M5501/31A-1645
4270-28Y
4270 M5501/31A-1715
4270-28R
Packaged 25/bag; 10 bags/box
4270 M5501/31A-1890
4270-32Y
4270 M5501/31A-1965
4270-32R
4270 M5501/31A-2140
4270-36Y
4270 M5501/31A-2215
4270-36R
4270 M5501/31A-2380
4270-40Y
4270 M5501/31A-2440
4270-40R
4270 M5501/31A-2630
4270-44Y
4270 M5501/31A-2720
4270-44R
4270 M5501/31A-2880
4270-48Y
4270 M5501/31A-2960
4270-48R
Model 4272 “D” Type Cover
M5501/32A
XXX
Product Description Old Prod. Desc. “A”
“B”
“C”
“D”
.636
.574
.530
.462
.530
.462
.512
.462
.512
.462
“E”
.536
.474
.430
.362
.430
.362
.436
.362
.434
.362
“F” “G” “H”
.469
.407
.363
.295
.363
.295
.369
.295
.367
.295
.280
.280
.280
.280
.280
.280
.280
.280
.280
.280
.240
.240
.240
.240
.240
.240
.240
.240
.240
.240
Model
Number
Mil-129H
Symbol
3M Logo
Size
“F” “E” “D”
“A”
“B”
“C”
“H”
“G”
Nominal Dimensions Packaged 100/bag; 10 bags/box
4272 M5501/32A-50P
4272-50P
2.112 2.179 2.279
4272 M5501/32A-50S
4272-50S
2.049 2.116 2.216
4272 M5501/32A-37P
4272-37P
2.216 2.283 2.383
4272 M5501/32A-37S
4272-37S
2.143 2.210 2.310
4272 M5501/32A-25P
4272-25P
1.586 1.635 1.735
4272 M5501/32A-25S
4272-25S
1.495 1.562 1.662
4272 M5501/32A-15P
4272-15P
1.040 1.107 1.177
4272 M5501/32A-15S
4272-15S
.955 1.022 1.122
4272 M5501/32A-9P
4272-9P
.708 .775
.849
4272 M5501/32A-9S
4272-9S
.627 .694
.794
For ordering information, technical information, product information or to request a copy of the Material
Safety Data Sheet, you can reach us at:
Phone: 1-800-328-1368
Important Notice
All statements, technical information, and recommendations related to
3M’s products are based on information believed to be reliable, but the
accuracy or completeness is not guaranteed. Before using this product,
you must evaluate it and determine if it is suitable for your intended
application. You assume all risks and liability associated with such use.
Any statements related to the product which are not contained in 3M’s
current publications, or any contrary statements contained on your
purchase order shall have no force or effect unless expressly agreed
upon, in writing, by an authorized officer of 3M.
Fax: 100-800-828-9329 or 1-800-512-984-2210
Warranty; Limited Remedy; Limited Liability.
This product will be free from defects in material and manufacture for a
period of ninety (90) days from the date of purchase. 3M MAKES NO
OTHER WARRANTIES INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. If this product is defective within the warranty period stated
above, your exclusive remedy shall be, at 3M’s option, to replace or repair
the 3M product or refund the purchase price of the 3M product. Except
where prohibited by law, 3M will not be liable for any loss or damage
arising from this 3M product, whether direct, indirect, special, incidental or
consequential regardless of the legal theory asserted.
3
Electronic Handling & Protection Division
6801 River Place Blvd.
Austin, TX 78726-9000
http://www.3M.com/ehpd
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40% Pre-consumer waste paper
10% Post-consumer waste paper
Litho in USA.
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