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 NON ENV EMI/RFI ST NICKEL

M85049/25-18N
Amphenol PCD
1: £47.61
12In Stock

Mfr. Part No.
M85049/25-18N

Mouser Part No
523-85049/25-18N

Amphenol PCD

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

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Datasheet

12In Stock

£47.61

£43.47

£37.01

£36.29

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Min.: 1
Mult.: 1

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

M85049/25-23N
Amphenol PCD
1: £74.23
12In Stock

Mfr. Part No.
M85049/25-23N

Mouser Part No
523-85049/25-23N

Amphenol PCD

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

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Datasheet

12In Stock

£74.23

£63.10

£59.15

£56.33

£56.14

Min.: 1
Mult.: 1

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

M85049/25-31N
Amphenol PCD
1: £55.37
24In Stock

Mfr. Part No.
M85049/25-31N

Mouser Part No
523-85049/25-31N

Amphenol PCD

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

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Datasheet

24In Stock

£55.37

£50.12

£49.48

£46.49

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 10

M85049/27-10N
Amphenol PCD
1: £9.59
2In Stock
25Expected 23/03/2026

Mfr. Part No.
M85049/27-10N

Mouser Part No
523-85049/27-10N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 10

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Datasheet

2In Stock

25Expected 23/03/2026

£9.59

£8.71

£7.54

£7.21

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 14

M85049/27-14N
Amphenol PCD
1: £9.60
17In Stock

Mfr. Part No.
M85049/27-14N

Mouser Part No
523-85049/27-14N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 14

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Datasheet

17In Stock

£9.60

£8.76

£8.52

£7.73

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells 27 Backshell Grommet Nut

M85049/27-16N
Amphenol PCD
1: £9.09
5In Stock

Mfr. Part No.
M85049/27-16N

Mouser Part No
523-85049/27-16N

Amphenol PCD

Circular MIL Spec Backshells 27 Backshell Grommet Nut

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Datasheet

5In Stock

£9.09

£8.07

£7.33

£6.77

£6.31

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 18

M85049/27-18N
Amphenol PCD
1: £9.17
19In Stock

Mfr. Part No.
M85049/27-18N

Mouser Part No
523-85049/27-18N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 18

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Datasheet

19In Stock

£9.17

£8.38

£7.52

£7.37

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 20

M85049/27-20N
Amphenol PCD
1: £8.88
2In Stock

Mfr. Part No.
M85049/27-20N

Mouser Part No
523-85049/27-20N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 20

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Datasheet

2In Stock

£8.88

£8.19

£7.94

£6.70

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 22

M85049/27-22N
Amphenol PCD
1: £11.57
4In Stock

Mfr. Part No.
M85049/27-22N

Mouser Part No
523-85049/27-22N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 22

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Datasheet

4In Stock

£11.57

£10.26

£9.86

£9.38

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 24

M85049/27-24N
Amphenol PCD
1: £9.96
21In Stock

Mfr. Part No.
M85049/27-24N

Mouser Part No
523-85049/27-24N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 24

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Datasheet

21In Stock

£9.96

£9.38

£7.96

£7.42

£7.01

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 08

M85049/27-8N
Amphenol PCD
1: £10.06
27In Stock

Mfr. Part No.
M85049/27-8N

Mouser Part No
523-85049/27-8N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 08

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Datasheet

27In Stock

£10.06

£8.91

£8.56

£8.15

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL NIC SZ 12

M85049/27S12N
Amphenol PCD
1: £14.99
23In Stock

Mfr. Part No.
M85049/27S12N

Mouser Part No
523-85049/27S12N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL NIC SZ 12

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Datasheet

23In Stock

£14.99

£12.74

£11.93

£11.37

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 10

M85049/2910A02A
Amphenol PCD
1: £28.94
1In Stock
25Expected 12/05/2026

Mfr. Part No.
M85049/2910A02A

Mouser Part No
523-85049/2910A02A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 10

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Datasheet

1In Stock

25Expected 12/05/2026

£28.94

£25.17

£24.08

£23.30

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 10

M85049/2910N03
Amphenol PCD
1: £28.95
15In Stock

Mfr. Part No.
M85049/2910N03

Mouser Part No
523-85049/2910N03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 10

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Datasheet

15In Stock

£28.95

£26.77

£22.75

£22.52

£21.28

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 12

M85049/2912N04
Amphenol PCD
1: £29.75
21In Stock

Mfr. Part No.
M85049/2912N04

Mouser Part No
523-85049/2912N04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 12

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Datasheet

21In Stock

£29.75

£25.87

£24.75

£23.95

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells 29 Backshell Non Env

M85049/2914N04
Amphenol PCD
1: £30.53
19In Stock

Mfr. Part No.
M85049/2914N04

Mouser Part No
523-85049/2914N04

Amphenol PCD

Circular MIL Spec Backshells 29 Backshell Non Env

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Datasheet

19In Stock

£30.53

£26.54

£25.40

£24.57

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 14

M85049/2914N05
Amphenol PCD
1: £34.37
18In Stock

Mfr. Part No.
M85049/2914N05

Mouser Part No
523-85049/2914N05

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 14

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Datasheet

18In Stock

£34.37

£30.41

£28.68

£25.93

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 14

M85049/2914N05A
Amphenol PCD
1: £32.04
6In Stock

Mfr. Part No.
M85049/2914N05A

Mouser Part No
523-85049/2914N05A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 14

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Datasheet

6In Stock

£32.04

£27.23

£25.52

£24.30

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 16

M85049/2916N02
Amphenol PCD
1: £28.45
1In Stock

Mfr. Part No.
M85049/2916N02

Mouser Part No
523-85049/2916N02

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 16

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Datasheet

1In Stock

£28.45

£26.30

£22.35

£22.12

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 16

M85049/2916N04
Amphenol PCD
1: £31.37
22In Stock

Mfr. Part No.
M85049/2916N04

Mouser Part No
523-85049/2916N04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 16

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Datasheet

22In Stock

£31.37

£27.27

£24.76

£24.37

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells 29 Backshell Non Env

M85049/2918N07A
Amphenol PCD
1: £35.16
10In Stock

Mfr. Part No.
M85049/2918N07A

Mouser Part No
523-85049/2918N07A

Amphenol PCD

Circular MIL Spec Backshells 29 Backshell Non Env

Learn More

Datasheet

10In Stock

£35.16

£30.58

£27.49

£26.49

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 18

M85049/2918N07B
Amphenol PCD
1: £35.53
26In Stock

Mfr. Part No.
M85049/2918N07B

Mouser Part No
523-85049/2918N07B

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 18

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Datasheet

26In Stock

£35.53

£30.35

£29.17

£28.26

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 20

M85049/2920N04A
Amphenol PCD
1: £33.06
5In Stock

Mfr. Part No.
M85049/2920N04A

Mouser Part No
523-85049/2920N04A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 20

Learn More

Datasheet

5In Stock

£33.06

£28.74

£27.50

£26.61

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 20

M85049/2920N05
Amphenol PCD
1: £33.06
6In Stock
19Expected 23/03/2026

Mfr. Part No.
M85049/2920N05

Mouser Part No
523-85049/2920N05

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 20

Learn More

Datasheet

6In Stock

19Expected 23/03/2026

£33.06

£27.61

£25.98

£25.04

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 20

M85049/2920N08A
Amphenol PCD
1: £35.09
29In Stock

Mfr. Part No.
M85049/2920N08A

Mouser Part No
523-85049/2920N08A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 20

Learn More

Datasheet

29In Stock

£35.09

£31.95

£27.16

£26.30

£25.71

Min.: 1
Mult.: 1

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