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 31 Backshell Grommet Nut

M85049/31-14N
Amphenol PCD
1: £8.75
78In Stock

Mfr. Part No.
M85049/31-14N

Mouser Part No
523-85049/31-14N

Amphenol PCD

Circular MIL Spec Backshells 31 Backshell Grommet Nut

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Datasheet

78In Stock

£8.75

£8.01

£7.70

£7.08

£6.44

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 16

M85049/31-16N
Amphenol PCD
1: £11.25
17In Stock

Mfr. Part No.
M85049/31-16N

Mouser Part No
523-85049/31-16N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 16

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Datasheet

17In Stock

£11.25

£9.98

£9.59

£9.12

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells 31 Backshell Grommet Nut

M85049/31-18N
Amphenol PCD
1: £7.31
17In Stock
25Expected 11/05/2026

Mfr. Part No.
M85049/31-18N

Mouser Part No
523-85049/31-18N

Amphenol PCD

Circular MIL Spec Backshells 31 Backshell Grommet Nut

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Datasheet

17In Stock

25Expected 11/05/2026

£7.31

£7.11

£6.70

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 20

M85049/31-20N
Amphenol PCD
1: £10.45
26In Stock

Mfr. Part No.
M85049/31-20N

Mouser Part No
523-85049/31-20N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 20

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Datasheet

26In Stock

£10.45

£10.17

£8.64

£8.35

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST BLACK SZ 22

M85049/31-22A
Amphenol PCD
1: £11.66
4In Stock

Mfr. Part No.
M85049/31-22A

Mouser Part No
523-85049/31-22A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST BLACK SZ 22

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Datasheet

4In Stock

£11.66

£10.11

£8.98

£8.90

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 22

M85049/31-22N
Amphenol PCD
1: £13.05
10In Stock

Mfr. Part No.
M85049/31-22N

Mouser Part No
523-85049/31-22N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 22

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Datasheet

10In Stock

£13.05

£10.84

£10.00

£8.92

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 24

M85049/31-24N
Amphenol PCD
1: £12.10
1In Stock

Mfr. Part No.
M85049/31-24N

Mouser Part No
523-85049/31-24N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 24

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Datasheet

1In Stock

£12.10

£10.53

£10.52

£10.35

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 32

M85049/31-32N
Amphenol PCD
1: £18.55
22In Stock

Mfr. Part No.
M85049/31-32N

Mouser Part No
523-85049/31-32N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 32

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Datasheet

22In Stock

£18.55

£16.85

£16.84

£15.71

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL NIC SZ 16

M85049/31S16N
Amphenol PCD
1: £16.17
23In Stock

Mfr. Part No.
M85049/31S16N

Mouser Part No
523-85049/31S16N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL NIC SZ 16

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Datasheet

23In Stock

£16.17

£13.74

£12.68

£12.37

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells 36 Backshell Non Env-EMI/RFI

M85049/3614N04
Amphenol PCD
1: £45.51
11In Stock

Mfr. Part No.
M85049/3614N04

Mouser Part No
523-85049/3614N04

Amphenol PCD

Circular MIL Spec Backshells 36 Backshell Non Env-EMI/RFI

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Datasheet

11In Stock

£45.51

£39.47

£37.95

£36.68

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells 36 Backshell Non Env-EMI/RFI

M85049/3614N05
Amphenol PCD
1: £46.87
11In Stock

Mfr. Part No.
M85049/3614N05

Mouser Part No
523-85049/3614N05

Amphenol PCD

Circular MIL Spec Backshells 36 Backshell Non Env-EMI/RFI

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Datasheet

11In Stock

£46.87

£43.41

£43.32

£39.31

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 16

M85049/3616N04
Amphenol PCD
1: £53.52
25In Stock

Mfr. Part No.
M85049/3616N04

Mouser Part No
523-85049/3616N04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 16

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Datasheet

25In Stock

£53.52

£47.86

£42.99

£38.83

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 16

M85049/3616N05
Amphenol PCD
1: £47.93
12In Stock

Mfr. Part No.
M85049/3616N05

Mouser Part No
523-85049/3616N05

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 16

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Datasheet

12In Stock

£47.93

£42.14

£40.52

£39.17

£37.01

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 16

M85049/3616N06
Amphenol PCD
1: £56.39
20In Stock

Mfr. Part No.
M85049/3616N06

Mouser Part No
523-85049/3616N06

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 16

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Datasheet

20In Stock

£56.39

£50.81

£41.76

£38.70

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 22

M85049/3622N06
Amphenol PCD
1: £53.21
5In Stock

Mfr. Part No.
M85049/3622N06

Mouser Part No
523-85049/3622N06

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 22

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Datasheet

5In Stock

£53.21

£45.23

£42.39

£40.37

£39.01

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC

M85049/6-12N
Amphenol PCD
1: £42.61
12In Stock

Mfr. Part No.
M85049/6-12N

Mouser Part No
523-85049/6-12N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC

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Datasheet

12In Stock

£42.61

£36.95

£35.53

£34.34

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC

M85049/6-17N
Amphenol PCD
1: £48.15
19In Stock

Mfr. Part No.
M85049/6-17N

Mouser Part No
523-85049/6-17N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC

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Datasheet

19In Stock

£48.15

£42.34

£40.72

£39.35

£37.18

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC SZ 9

M85049/78-09N02
Amphenol PCD
1: £51.25
5In Stock
25Expected 16/03/2026

Mfr. Part No.
M85049/78-09N02

Mouser Part No
523-85049/78-09N02

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC SZ 9

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Datasheet

5In Stock

25Expected 16/03/2026

£51.25

£43.20

£42.91

£37.85

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC SZ 19

M85049/78-19N03
Amphenol PCD
1: £59.14
3In Stock
5Expected 26/03/2026

Mfr. Part No.
M85049/78-19N03

Mouser Part No
523-85049/78-19N03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC SZ 19

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Datasheet

3In Stock

5Expected 26/03/2026

£59.14

£51.43

£46.72

£44.03

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC SZ 21

M85049/78-21N07
Amphenol PCD
1: £62.01
5In Stock

Mfr. Part No.
M85049/78-21N07

Mouser Part No
523-85049/78-21N07

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC SZ 21

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Datasheet

5In Stock

£62.01

£55.00

£51.04

£49.11

£48.54

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC SZ 21

M85049/78-21N08
Amphenol PCD
1: £58.05
11In Stock

Mfr. Part No.
M85049/78-21N08

Mouser Part No
523-85049/78-21N08

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC SZ 21

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Datasheet

11In Stock

£58.05

£56.25

£52.72

£50.21

£49.51

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC SZ 25

M85049/78-25N10
Amphenol PCD
1: £76.19
10In Stock

Mfr. Part No.
M85049/78-25N10

Mouser Part No
523-85049/78-25N10

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC SZ 25

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Datasheet

10In Stock

£76.19

£64.77

£60.71

£57.81

£57.76

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI R/A NIC SZ 13

M85049/79-13N03
Amphenol PCD
1: £60.17
5In Stock
25Expected 09/03/2026

Mfr. Part No.
M85049/79-13N03

Mouser Part No
523-85049/79-13N03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI R/A NIC SZ 13

Learn More

Datasheet

5In Stock

25Expected 09/03/2026

£60.17

£52.05

£49.31

£46.22

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI R/A NIC SZ 15

M85049/79-15N02
Amphenol PCD
1: £58.65
20In Stock

Mfr. Part No.
M85049/79-15N02

Mouser Part No
523-85049/79-15N02

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI R/A NIC SZ 15

Learn More

Datasheet

20In Stock

£58.65

£52.14

£45.81

£45.29

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI R/A NIC SZ 15

M85049/79-15N04
Amphenol PCD
1: £61.49
20In Stock

Mfr. Part No.
M85049/79-15N04

Mouser Part No
523-85049/79-15N04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI R/A NIC SZ 15

Learn More

Datasheet

20In Stock

£61.49

£57.45

£57.44

£56.58

View

Min.: 1
Mult.: 1

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