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Conductive Silicone Washers

EMI/RFI grounding washers are manufactured from conductive silicone and made into a washer configuration utilizing a close-tolerance manufacturing process. The grounding washer can be supplied in various O.D., I.D., and thickness to satisfy many requirements as indicated in the applications shown in Figures 1 through 4 below.

Product Application

Conductive silicone washers are manufactured to provide a snug fit around a shaft or rod to eliminate the possibility of it acting as an antenna to radiate or pick up unwanted electromagnetic noise. The conductive silicone washers can be supplied in silicone, fluorosilicone, or EPDM effective in hostile environments incorporating fuels or decontamination chemicals.

application figure ewasher

EMI/RFI Conductive silicone Washer Sizes

Figure #5

EMI/RFI Conductive Silicone Washer Sizes

 

CONDUCTIVE SILICONE FLAT WASHERS
I.D.
+/- .015
O.D.
+/- .015
THICK
T
MIL SPEC
M83528/012X-( )
MAJR PART NUMBER
.250 .625 .032 (001) 2603-025063-XX
.062 (002) 2606-025063-XX
.375 .750 .032 (003) 2603-038075-XX
.062 (004) 2606-038075-XX
.500 .656 .032 (005) 2603-050066-XX
.062 (006) 2606-050066-XX
.500 .875 .032 (007) 2603-050088-XX
.062 (008) 2606-050088-XX
.750 1.000 .032 (009) 2603-075010-XX
.062 (010) 2606-075010-XX
1.000 1.438 .032 (011) 2603-100144-XX
.062 (012) 2606-100144-XX

 

Note: Replace -XX with the appropriate Material Designation Number found below in Table #1 below.

Note: Other sizes available on request.

 

Table 1

Material Chart:

Conductive Elastomer Material Chart
Material Designation Number 52 61 62 63 64 65 66 67
Elastomer Silicone Silicone Silicone Silicone Fluorosilicone Silicone Silicone Silicone
MIL-DTL-83528 Type M A B D L E
Conductive filler Ni/Gr Ag/Glass Ag/Cu Ag/Al Ag/Al Ag/Ni Ag Carbon
Volume resistivity Ohm-cm 0.100 0.006 0.005 0.008 0.012 0.005 0.002 7.000
Hardness Shore A 30-70 65 85 65 70 75 65 70
Operating Temp. Deg. C. Min. -55 -55 -45 -55 -55 -55 -55 -55
Deg. C. Max. 150 160 125 160 160 125 160 200
Material Designation Number 68 69 71 74 75 76 78 79
Elastomer Silicone Fluorosilicone Silicone Fluorosilicone Fluorosilicone Silicone Silicone Silicone
MIL-DTL-83528 Type K F C I H G
Conductive filler Ag/Cu Ag Ni/Al Ag/Cu Ni/Gr Ag Ag Ag/Cu
Volume resistivity Ohm-cm 0.004 0.002 0.08 0.010 0.100 0.010 0.005 0.007
Hardness Shore A 85 75 65 75 65 45 80 80
Operating Temp. Deg. C. Min. -55 -65 -60 -55 -55 -55 -55 -45
Deg. C. Max. 125 160 200 125 150 160 160 125

 

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