Connectors – Mouser United Kingdom

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Backshells

Amphenol PCD Backshells offer strain relief, environmental protection, and 360° EMI/RFI shielding at the termination area of virtually any circular connector. These connectors feature a base material constructed of aluminum alloy, stainless steel, brass, or composite and a variety of finishes such as black zinc nickel, cadmium, electroless nickel, anodized black, passivated, and more. Amphenol PCD Backshells have custom designs available and meet or exceed RoHS/REACH compliance standards. Available in both military specifications and commercial types for any application, these backshells meet the Society of Automotive Engineers (SAE) AS85049 standard.

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Part #

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 17

M85049/1817W06A
Amphenol PCD
1: £61.85
13In Stock

Mfr. Part No.
M85049/1817W06A

Mouser Part No
523-85049/1817W06A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 17

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Datasheet

13In Stock

£61.85

£57.43

£56.58

£49.58

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 19

M85049/1819W03
Amphenol PCD
1: £51.43
20In Stock

Mfr. Part No.
M85049/1819W03

Mouser Part No
523-85049/1819W03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 19

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Datasheet

20In Stock

£51.43

£45.61

£43.61

£41.53

£40.22

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 19

M85049/1819W04
Amphenol PCD
1: £68.09
7In Stock
25Expected 17/04/2026

Mfr. Part No.
M85049/1819W04

Mouser Part No
523-85049/1819W04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 19

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Datasheet

7In Stock

25Expected 17/04/2026

£68.09

£54.68

£50.76

£45.60

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 19

M85049/1819W06A
Amphenol PCD
1: £57.05
7In Stock

Mfr. Part No.
M85049/1819W06A

Mouser Part No
523-85049/1819W06A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 19

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Datasheet

7In Stock

£57.05

£52.99

£46.60

£44.54

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 21

M85049/1821W04
Amphenol PCD
1: £57.49
17In Stock
25Expected 09/03/2026

Mfr. Part No.
M85049/1821W04

Mouser Part No
523-85049/1821W04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 21

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Datasheet

17In Stock

25Expected 09/03/2026

£57.49

£48.87

£45.81

£43.62

£42.45

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 21

M85049/1821W07A
Amphenol PCD
1: £61.93
10In Stock

Mfr. Part No.
M85049/1821W07A

Mouser Part No
523-85049/1821W07A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 21

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Datasheet

10In Stock

£61.93

£55.71

£55.18

£54.29

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 21

M85049/1821W08B
Amphenol PCD
1: £64.44
6In Stock
25Expected 18/05/2026

Mfr. Part No.
M85049/1821W08B

Mouser Part No
523-85049/1821W08B

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 21

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Datasheet

6In Stock

25Expected 18/05/2026

£64.44

£57.96

£55.73

£53.87

£50.90

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 23

M85049/1823W06
Amphenol PCD
1: £60.39
20In Stock
25Expected 04/03/2026

Mfr. Part No.
M85049/1823W06

Mouser Part No
523-85049/1823W06

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 23

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Datasheet

20In Stock

25Expected 04/03/2026

£60.39

£53.23

£49.60

£47.44

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 23

M85049/1823W09
Amphenol PCD
1: £66.90
1In Stock
11Expected 23/03/2026

Mfr. Part No.
M85049/1823W09

Mouser Part No
523-85049/1823W09

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 23

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Datasheet

1In Stock

11Expected 23/03/2026

£66.90

£61.01

£58.65

£56.43

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 25

M85049/1825W04
Amphenol PCD
1: £74.53
13In Stock
25Expected 06/04/2026

Mfr. Part No.
M85049/1825W04

Mouser Part No
523-85049/1825W04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 25

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Datasheet

13In Stock

25Expected 06/04/2026

£74.53

£68.10

£60.07

£54.32

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1825W09A
Amphenol PCD
1: £83.47
11In Stock

Mfr. Part No.
M85049/1825W09A

Mouser Part No
523-85049/1825W09A

Amphenol PCD

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

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Datasheet

11In Stock

£83.47

£76.74

£63.48

£57.36

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 13

M85049/1913W02
Amphenol PCD
1: £51.66
16In Stock

Mfr. Part No.
M85049/1913W02

Mouser Part No
523-85049/1913W02

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 13

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Datasheet

16In Stock

£51.66

£46.19

£41.56

£38.34

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 13

M85049/1913W03
Amphenol PCD
1: £38.75
2In Stock
25On Order

Mfr. Part No.
M85049/1913W03

Mouser Part No
523-85049/1913W03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 13

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Datasheet

2In Stock

25On Order

£38.75

£37.22

£34.49

£33.57

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 15

M85049/1915W03
Amphenol PCD
1: £44.11
20In Stock

Mfr. Part No.
M85049/1915W03

Mouser Part No
523-85049/1915W03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 15

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Datasheet

20In Stock

£44.11

£43.75

£40.18

£37.30

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 15

M85049/1915W04
Amphenol PCD
1: £47.65
13In Stock
25Expected 16/03/2026

Mfr. Part No.
M85049/1915W04

Mouser Part No
523-85049/1915W04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 15

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Datasheet

13In Stock

25Expected 16/03/2026

£47.65

£41.87

£39.25

£37.37

£35.85

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 17

M85049/1917W04
Amphenol PCD
1: £57.46
1In Stock
50On Order

Mfr. Part No.
M85049/1917W04

Mouser Part No
523-85049/1917W04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 17

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Datasheet

1In Stock

50On Order

£57.46

£53.14

£44.95

£39.45

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

M85049/1919W04
Amphenol PCD
1: £51.02
15In Stock

Mfr. Part No.
M85049/1919W04

Mouser Part No
523-85049/1919W04

Amphenol PCD

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

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Datasheet

15In Stock

£51.02

£45.18

£45.17

£44.51

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 19

M85049/1919W06
Amphenol PCD
1: £53.06
18In Stock

Mfr. Part No.
M85049/1919W06

Mouser Part No
523-85049/1919W06

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 19

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Datasheet

18In Stock

£53.06

£46.65

£41.76

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

M85049/1919W07
Amphenol PCD
1: £62.51
7In Stock
25Expected 09/03/2026

Mfr. Part No.
M85049/1919W07

Mouser Part No
523-85049/1919W07

Amphenol PCD

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

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Datasheet

7In Stock

25Expected 09/03/2026

£62.51

£55.95

£47.54

£42.00

£39.29

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 21

M85049/1921W05
Amphenol PCD
1: £53.33
5In Stock
25Expected 09/03/2026

Mfr. Part No.
M85049/1921W05

Mouser Part No
523-85049/1921W05

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 21

Learn More

Datasheet

5In Stock

25Expected 09/03/2026

£53.33

£50.09

£50.08

£49.86

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 21

M85049/1921W06
Amphenol PCD
1: £54.38
1In Stock
25Expected 10/06/2026

Mfr. Part No.
M85049/1921W06

Mouser Part No
523-85049/1921W06

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 21

Learn More

Datasheet

1In Stock

25Expected 10/06/2026

£54.38

£48.87

£41.54

£40.92

£39.88

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

M85049/1921W08
Amphenol PCD
1: £51.25
17In Stock
25Expected 11/05/2026

Mfr. Part No.
M85049/1921W08

Mouser Part No
523-85049/1921W08

Amphenol PCD

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

Learn More

Datasheet

17In Stock

25Expected 11/05/2026

£51.25

£41.68

£41.51

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 23

M85049/1923W04B
Amphenol PCD
1: £58.49
24In Stock

Mfr. Part No.
M85049/1923W04B

Mouser Part No
523-85049/1923W04B

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 23

Learn More

Datasheet

24In Stock

£58.49

£52.00

£50.00

£48.33

£45.66

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

M85049/1923W06
Amphenol PCD
1: £58.05
1In Stock

Mfr. Part No.
M85049/1923W06

Mouser Part No
523-85049/1923W06

Amphenol PCD

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

Learn More

Datasheet

1In Stock

£58.05

£49.35

£46.25

£44.05

£42.91

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 23

M85049/1923W07
Amphenol PCD
1: £59.68
6In Stock
25Expected 22/06/2026

Mfr. Part No.
M85049/1923W07

Mouser Part No
523-85049/1923W07

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 23

Learn More

Datasheet

6In Stock

25Expected 22/06/2026

£59.68

£54.27

£49.21

£46.58

Quote

Min.: 1
Mult.: 1

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