Environmental Connector Seal

Back-Mount Version

We offer the newest inspiration in Connector-Seal gaskets, providing superior EMI and Environmental protection for square flange-mounted circular connectors. Spira's unique design includes a rigid layer between silicone or fluorosilicone sealing which provides the most reliable and effective one-atmosphere seal for the life of the system. Our Environmental Connector-Seal gaskets can be specified to front or back mount on your connector, and include Spira’s patented spiral gasket for excellent EMI shielding up to 152dB.

The information below refers to our Environmental Connector-Seal Gasket "ECS" which is typically back-mounted but can be front-mounted in some sizes as noted.

Spira offers the following Connector-Seal Gaskets. Contact us for assistance or free samples.

  • Environmental Connector-Seal Gasket "ECS" (back-mount), detailed in the ECS product datasheet.
  • Front-Mount Environmental Connector-Seal "FMECS", detailed in the FMECS product datasheet.
  • Environmental-Only Connector-Seal "EOCS" without an EMI gasket, detailed in the EOCS product datasheet.
  • EMI-Only Connector-Seal "CS" (no environmental protection), detailed in the CS product datasheet. (Same sizing as our old SSCG gaskets but with a more durable frame.)

Application Information

These gaskets are made by attaching a Spira-Shield O-Ring to an environmental sealing retaining frame. The retaining frame consists of a stainless steel plate with vulcanized silicone or fluorosilicone sheeting on both sides of the plate. The stainless steel plate eliminates cold flow of the environmental sealing elastomer.

The "ECS" EMI & Environmental Connector-Seal is designed primarily for back mounting of the connector. The shell sizes noted with an asterisk (*) can be used for both front and back mounting. Our new "FMECS" Front-Mount EMI & Environmental Connector-Seal is also available in a wide range of sizes.

Materials:
Frame: Corrosion resistant Stainless steel, between silicone or fluorosilicone elastomeric sheeting material.
Spiral: Spira-Shield standard force tin/lead plated beryllium copper gasket. Compression force is ~ 30 lbs/linear inch. (See Options for RoHS compliance).
Refer to Material Specifications for more information.

Note: this gasket can also be ordered as "Environmental only", with no spiral if desired. (See "EOCS" below.)

Shielding Quality:
Connector-Seal gaskets offer shielding quality from 116 to 152 dB. The level is dependent on contact surfaces and may vary depending on your specific application. Refer to Shielding Quality for more complete performance data.

Spira connector Seal

Available Options

Plating:
The gasket is electroplated, 90% tin, 10% lead per AMS-P-81728 (edges unplated). Plating options can be specified by adding a prefix before the part number:
E: Edge tin/lead plating (includes edges) for high humidity or salt-fog environments
IW: RoHS compliant tin plating (Example: ECS-IW-21 /S)
EIW: RoHS compliant edge tin plating for high humidity or salt-fog
Refer to Material Compatibility for more information.

Frame:
The frame is stainless steel sealed on both sides by silicone or fluorosilicone elastomeric material. Specify “/S” for Silicone or “/F” for Fluorosilicone.
The frame can also be ordered with the same dimensions but without a shielding gasket by removing the “-T” from the part number as shown in the table below.

Sealing
Environmental Only (No Gasket)
Tin/Lead
Plated Gasket
RoHS Tin
Plated Gasket
Edge Tin/Lead
Plated Gasket
RoHS Edge Tin
Plated Gasket
Silicone
EOCS-__ /S
ECS-T-__ /S
ECS-IW-__ /S
ECS-E-__ /S
ECS-EIW-__ /S
Fluorosilicone
EOCS-__ /F
ECS-T-__ /F
ECS-IW-__ /F
ECS-E-__ /F
ECS-EIW-__ /F

Specify frame and plating options by choosing the desired prefix from the table.

 

Ordering Information

Connector-Seal gaskets are ordered by the piece.

See our Part Number Matrix for assistance with part numbers, options and product comparisons.

Back Mount
Front Mount
Environmental Silicone or Fluorosilicone Seal
Back Mount
Front Mount
 

Dash No. MIL-C-38999
MIL-C-38999
Series II,
MIL-E-26482, MS27472,
MS27497
M83723
MS27613
A
B
C
D
Series I
MS27656
Series III
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21


9


11

13

15

17 

19

21

23
 
25



9

11

13

 15

17
 
19

21

23

25
8



10

12

14

16
 
18

20

22
 
24


8

 
10

12

14
 
16
 
18

20

22
 
24




 


12

14
 
16
 
18



22
 
24

28

0.594
0.594
0.719
0.719
0.719
0.812
0.812
0.906
0.906
0.969
0.969
1.062
1.062
1.156
1.156
1.250
1.250
1.375
1.375
1.500
1.562
 0.448
0.510
0.672
0.482
0.695
0.601
0.790
0.719
0.885
0.876
1.010
0.994
1.082
1.112
1.198
1.230
1.332
1.349
1.452
1.467
1.710
0.828
0.828
0.958
0.938
0.954
1.031
1.031
1.125
1.125
1.219
1.234
1.312
1.328
1.438
1.453
1.562
1.562
1.688
1.703
1.812
2.000
0.828
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.152
0.152
0.152
0.152
       
MS-3412, MIL-DTL 5015 Series II
MIL-C-28840
A
B
C
D
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
     

8*
10*

12*

14*

16*

18*

20*
22*

24*

28*

32*

36*
40*
44*
48*

11*

13*

15*

17*

19*


23*

25*

29*

33*

0.594
0.719
0.750
0.812
0.843
0.906
0.968
0.969
1.015
1.062
1.140
1.156
1.250
1.281
1.375
1.392
1.562
1.568
1.750
1.734
1.938
2.188
2.375
2.625
0.510
0.635
0.760
0.760
0.885
0.885
1.072
1.010
1.135
1.135
1.322
1.260
1.385
1.510
1.510
1.635
1.760
1.885
2.010
2.073
2.260
2.510
2.760
3.010
0.875
1.000
1.023
1.094
1.138
1.188
1.258
1.281
1.383
1.375
1.508
1.500
1.625
1.718
1.750
1.818
2.000
2.138
2.250
2.328
2.500
2.750
3.000
3.250
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.125
0.152
0.152
0.152
0.152
0.172
0.172
0.172
0.172
0.172
0.172
*The gaskets are designed for back mounting of the connectors. Shell sizes noted with an asterisk (*) can be used for both front or back mounting.

Custom sizes are also available. Contact us for more information.

Note that the dash numbers and sizes are different for the Environmental Connector-Seal vs. the EMI-Only version.