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 18 Backshell Env-EMI/RFI

M85049/1819N05
Amphenol PCD
1: £52.21
37In Stock
50Expected 11/03/2026

Mfr. Part No.
M85049/1819N05

Mouser Part No
523-85049/1819N05

Amphenol PCD

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

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Datasheet

37In Stock

50Expected 11/03/2026

£52.21

£49.53

£43.56

£41.23

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1821N05
Amphenol PCD
1: £50.35
67In Stock

Mfr. Part No.
M85049/1821N05

Mouser Part No
523-85049/1821N05

Amphenol PCD

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

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Datasheet

67In Stock

£50.35

£44.78

£41.46

£39.95

£39.35

Min.: 1
Mult.: 1

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

M85049/1821N07
Amphenol PCD
1: £47.19
33In Stock

Mfr. Part No.
M85049/1821N07

Mouser Part No
523-85049/1821N07

Amphenol PCD

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

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Datasheet

33In Stock

£47.19

£46.71

£43.94

£42.66

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Min.: 1
Mult.: 1

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

M85049/1823N04
Amphenol PCD
1: £63.79
32In Stock

Mfr. Part No.
M85049/1823N04

Mouser Part No
523-85049/1823N04

Amphenol PCD

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

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Datasheet

32In Stock

£63.79

£57.87

£51.57

£46.94

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Min.: 1
Mult.: 1

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

M85049/1823N05
Amphenol PCD
1: £44.92
39In Stock

Mfr. Part No.
M85049/1823N05

Mouser Part No
523-85049/1823N05

Amphenol PCD

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

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Datasheet

39In Stock

£44.92

£44.58

£42.26

Min.: 1
Mult.: 1

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

M85049/1823N09
Amphenol PCD
1: £70.06
29In Stock

Mfr. Part No.
M85049/1823N09

Mouser Part No
523-85049/1823N09

Amphenol PCD

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

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Datasheet

29In Stock

£70.06

£64.79

£51.25

£47.96

£45.76

Min.: 1
Mult.: 1

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

M85049/1825N04
Amphenol PCD
1: £58.06
42In Stock

Mfr. Part No.
M85049/1825N04

Mouser Part No
523-85049/1825N04

Amphenol PCD

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

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Datasheet

42In Stock

£58.06

£51.67

£47.04

£44.51

£43.58

Min.: 1
Mult.: 1

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

M85049/1825N05
Amphenol PCD
1: £58.73
51In Stock
50Expected 15/05/2026

Mfr. Part No.
M85049/1825N05

Mouser Part No
523-85049/1825N05

Amphenol PCD

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

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Datasheet

51In Stock

50Expected 15/05/2026

£58.73

£50.74

£46.74

£45.19

£44.48

Min.: 1
Mult.: 1

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

M85049/1825N06
Amphenol PCD
1: £56.38
50In Stock

Mfr. Part No.
M85049/1825N06

Mouser Part No
523-85049/1825N06

Amphenol PCD

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

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Datasheet

50In Stock

£56.38

£51.14

£47.40

£45.36

Min.: 1
Mult.: 1

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

M85049/1825N07
Amphenol PCD
1: £50.10
80In Stock

Mfr. Part No.
M85049/1825N07

Mouser Part No
523-85049/1825N07

Amphenol PCD

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

Learn More

Datasheet

80In Stock

£50.10

£47.53

£46.28

Min.: 1
Mult.: 1

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

M85049/1825N07B
Amphenol PCD
1: £64.86
23In Stock

Mfr. Part No.
M85049/1825N07B

Mouser Part No
523-85049/1825N07B

Amphenol PCD

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

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Datasheet

23In Stock

£64.86

£58.35

£56.11

£54.23

£51.24

Min.: 1
Mult.: 1

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

M85049/1825N08
Amphenol PCD
1: £63.59
69In Stock
50Expected 18/05/2026

Mfr. Part No.
M85049/1825N08

Mouser Part No
523-85049/1825N08

Amphenol PCD

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

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Datasheet

69In Stock

50Expected 18/05/2026

£63.59

£58.43

£53.15

£53.13

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Min.: 1
Mult.: 1

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

M85049/1825N10
Amphenol PCD
1: £62.82
26In Stock

Mfr. Part No.
M85049/1825N10

Mouser Part No
523-85049/1825N10

Amphenol PCD

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

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Datasheet

26In Stock

£62.82

£58.46

£51.14

£51.05

£49.10

Min.: 1
Mult.: 1

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

M85049/1913N02
Amphenol PCD
1: £46.67
83In Stock

Mfr. Part No.
M85049/1913N02

Mouser Part No
523-85049/1913N02

Amphenol PCD

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

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Datasheet

83In Stock

£46.67

£41.97

£34.50

£33.85

View

Min.: 1
Mult.: 1

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

M85049/1913N04
Amphenol PCD
1: £43.93
56In Stock
50Expected 23/04/2026

Mfr. Part No.
M85049/1913N04

Mouser Part No
523-85049/1913N04

Amphenol PCD

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

Learn More

Datasheet

56In Stock

50Expected 23/04/2026

£43.93

£40.37

£34.67

£31.67

£31.43

Min.: 1
Mult.: 1

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

M85049/1917N05
Amphenol PCD
1: £62.82
47In Stock
50Expected 16/03/2026

Mfr. Part No.
M85049/1917N05

Mouser Part No
523-85049/1917N05

Amphenol PCD

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

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Datasheet

47In Stock

50Expected 16/03/2026

£62.82

£58.16

£48.87

£38.48

View

Min.: 1
Mult.: 1

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

M85049/1919N04
Amphenol PCD
1: £46.50
30In Stock

Mfr. Part No.
M85049/1919N04

Mouser Part No
523-85049/1919N04

Amphenol PCD

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

Learn More

Datasheet

30In Stock

£46.50

£39.52

£37.04

£35.28

£33.65

Min.: 1
Mult.: 1

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

M85049/1919N07
Amphenol PCD
1: £49.21
63In Stock
100Expected 09/03/2026

Mfr. Part No.
M85049/1919N07

Mouser Part No
523-85049/1919N07

Amphenol PCD

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

Learn More

Datasheet

63In Stock

100Expected 09/03/2026

£49.21

£45.51

£38.68

£37.16

£35.71

Min.: 1
Mult.: 1

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

M85049/1923N07
Amphenol PCD
1: £54.28
43In Stock

Mfr. Part No.
M85049/1923N07

Mouser Part No
523-85049/1923N07

Amphenol PCD

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

Learn More

Datasheet

43In Stock

£54.28

£50.54

£44.27

£42.38

View

Min.: 1
Mult.: 1

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

M85049/1923N08
Amphenol PCD
1: £55.16
26In Stock

Mfr. Part No.
M85049/1923N08

Mouser Part No
523-85049/1923N08

Amphenol PCD

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

Learn More

Datasheet

26In Stock

£55.16

£46.90

£46.89

£41.83

£40.58

Min.: 1
Mult.: 1

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

M85049/1925N04
Amphenol PCD
1: £52.66
25In Stock
25Expected 10/03/2026

Mfr. Part No.
M85049/1925N04

Mouser Part No
523-85049/1925N04

Amphenol PCD

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

Learn More

Datasheet

25In Stock

25Expected 10/03/2026

£52.66

£44.75

£43.53

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 25

M85049/1925N05
Amphenol PCD
1: £43.48
47In Stock

Mfr. Part No.
M85049/1925N05

Mouser Part No
523-85049/1925N05

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 25

Learn More

Datasheet

47In Stock

£43.48

£41.90

£40.32

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 25

M85049/1925N08
Amphenol PCD
1: £58.35
29In Stock

Mfr. Part No.
M85049/1925N08

Mouser Part No
523-85049/1925N08

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 25

Learn More

Datasheet

29In Stock

£58.35

£51.86

£49.87

£48.21

£45.54

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 25

M85049/1925N10
Amphenol PCD
1: £58.58
49In Stock
50Expected 28/04/2026

Mfr. Part No.
M85049/1925N10

Mouser Part No
523-85049/1925N10

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 25

Learn More

Datasheet

49In Stock

50Expected 28/04/2026

£58.58

£51.05

£46.04

£45.18

£44.52

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NICKEL

M85049/25-29N
Amphenol PCD
1: £77.73
24In Stock

Mfr. Part No.
M85049/25-29N

Mouser Part No
523-85049/25-29N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NICKEL

Learn More

Datasheet

24In Stock

£77.73

£70.89

£68.16

£65.89

£62.24

Min.: 1
Mult.: 1

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