Connectors – Mouser United Kingdom

.hide-partial { max-height: none; } .show-more { display: none; }

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.

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Types of Connectors

List Images

Results: 11,097

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-21W
Amphenol PCD
1: £67.49
8In Stock
25Expected 23/04/2026

Mfr. Part No.
M85049/11-21W

Mouser Part No
523-85049/11-21W

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Learn More

Datasheet

8In Stock

25Expected 23/04/2026

£67.49

£58.55

£54.00

£41.38

£40.52

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 45 Deg EMI/RFI Environmental Backshell

M85049/11-28W
Amphenol PCD
1: £57.93
1In Stock

Mfr. Part No.
M85049/11-28W

Mouser Part No
523-85049/11-28W

Amphenol PCD

Circular MIL Spec Backshells 45 Deg EMI/RFI Environmental Backshell

Learn More

Datasheet

1In Stock

£57.93

£52.04

£45.54

£44.72

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 11 Backshell Env

M85049/11-31W
Amphenol PCD
1: £68.08
2In Stock
25Expected 18/05/2026

Mfr. Part No.
M85049/11-31W

Mouser Part No
523-85049/11-31W

Amphenol PCD

Circular MIL Spec Backshells 11 Backshell Env

Learn More

Datasheet

2In Stock

25Expected 18/05/2026

£68.08

£62.38

£54.55

£50.42

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-41W
Amphenol PCD
1: £65.57
15In Stock

Mfr. Part No.
M85049/11-41W

Mouser Part No
523-85049/11-41W

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Learn More

Datasheet

15In Stock

£65.57

£59.34

£55.75

£51.33

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-51W
Amphenol PCD
1: £97.70
7In Stock

Mfr. Part No.
M85049/11-51W

Mouser Part No
523-85049/11-51W

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Learn More

Datasheet

7In Stock

£97.70

£57.47

£54.91

£52.29

£51.76

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 11 Backshell Env

M85049/11-55W
Amphenol PCD
1: £94.68
1In Stock
25Expected 23/04/2026

Mfr. Part No.
M85049/11-55W

Mouser Part No
523-85049/11-55W

Amphenol PCD

Circular MIL Spec Backshells 11 Backshell Env

Learn More

Datasheet

1In Stock

25Expected 23/04/2026

£94.68

£86.00

£75.87

£69.67

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-69W
Amphenol PCD
1: £103.81
1In Stock

Mfr. Part No.
M85049/11-69W

Mouser Part No
523-85049/11-69W

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Learn More

Datasheet

1In Stock

£103.81

£95.65

£91.71

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-09W
Amphenol PCD
1: £49.50
23In Stock

Mfr. Part No.
M85049/11-09W

Mouser Part No
523-85049/11-9W

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Learn More

Datasheet

23In Stock

£49.50

£45.81

£39.80

£38.21

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST OD CAD SZ 13

M85049/14-13W
Amphenol PCD
1: £11.58
13In Stock

Mfr. Part No.
M85049/14-13W

Mouser Part No
523-85049/14-13W

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST OD CAD SZ 13

Learn More

Datasheet

13In Stock

£11.58

£10.27

£9.21

£9.04

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL OD CAD SZ 15

M85049/14S15W
Amphenol PCD
1: £17.52
17In Stock

Mfr. Part No.
M85049/14S15W

Mouser Part No
523-85049/14S15W

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL OD CAD SZ 15

Learn More

Datasheet

17In Stock

£17.52

£14.94

£14.22

£11.83

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL OD CAD SZ 17

M85049/14S17W
Amphenol PCD
1: £16.66
4In Stock

Mfr. Part No.
M85049/14S17W

Mouser Part No
523-85049/14S17W

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL OD CAD SZ 17

Learn More

Datasheet

4In Stock

£16.66

£14.16

£11.90

£11.41

£11.39

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL OD CAD SZ 21

M85049/14S21W
Amphenol PCD
1: £19.54
12In Stock

Mfr. Part No.
M85049/14S21W

Mouser Part No
523-85049/14S21W

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL OD CAD SZ 21

Learn More

Datasheet

12In Stock

£19.54

£17.39

£16.08

£13.64

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL OD CAD SZ 09

M85049/14S9W
Amphenol PCD
1: £16.92
13In Stock

Mfr. Part No.
M85049/14S9W

Mouser Part No
523-85049/14S9W

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL OD CAD SZ 09

Learn More

Datasheet

13In Stock

£16.92

£15.27

£13.57

£12.52

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 10

M85049/1710W02
Amphenol PCD
1: £56.72
4In Stock

Mfr. Part No.
M85049/1710W02

Mouser Part No
523-85049/1710W02

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 10

Learn More

Datasheet

4In Stock

£56.72

£51.11

£50.26

£49.56

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 10

M85049/1710W03
Amphenol PCD
1: £50.85
18In Stock

Mfr. Part No.
M85049/1710W03

Mouser Part No
523-85049/1710W03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 10

Learn More

Datasheet

18In Stock

£50.85

£41.46

£40.52

£38.59

£37.12

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 12

M85049/1712W03
Amphenol PCD
1: £39.93
25In Stock

Mfr. Part No.
M85049/1712W03

Mouser Part No
523-85049/1712W03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 12

Learn More

Datasheet

25In Stock

£39.93

£37.33

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 12

M85049/1712W03A
Amphenol PCD
1: £52.50
3In Stock

Mfr. Part No.
M85049/1712W03A

Mouser Part No
523-85049/1712W03A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 12

Learn More

Datasheet

3In Stock

£52.50

£44.63

£41.83

£39.83

£38.44

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 12

M85049/1712W04
Amphenol PCD
1: £50.55
25In Stock

Mfr. Part No.
M85049/1712W04

Mouser Part No
523-85049/1712W04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 12

Learn More

Datasheet

25In Stock

£50.55

£46.27

£42.64

£38.44

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 12

M85049/1712W04A
Amphenol PCD
1: £59.91
9In Stock

Mfr. Part No.
M85049/1712W04A

Mouser Part No
523-85049/1712W04A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 12

Learn More

Datasheet

9In Stock

£59.91

£54.73

£50.76

£50.01

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 17 Backshell Env-EMI/RFI

M85049/1714W05
Amphenol PCD
1: £63.09
18In Stock

Mfr. Part No.
M85049/1714W05

Mouser Part No
523-85049/1714W05

Amphenol PCD

Circular MIL Spec Backshells 17 Backshell Env-EMI/RFI

Learn More

Datasheet

18In Stock

£63.09

£57.25

£51.06

£45.31

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 16

M85049/1716W03
Amphenol PCD
1: £54.55
17In Stock

Mfr. Part No.
M85049/1716W03

Mouser Part No
523-85049/1716W03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 16

Learn More

Datasheet

17In Stock

£54.55

£52.22

£52.21

£52.08

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 17 Backshell Env-EMI/RFI

M85049/1720W04
Amphenol PCD
1: £57.49
22In Stock

Mfr. Part No.
M85049/1720W04

Mouser Part No
523-85049/1720W04

Amphenol PCD

Circular MIL Spec Backshells 17 Backshell Env-EMI/RFI

Learn More

Datasheet

22In Stock

£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 20

M85049/1720W06
Amphenol PCD
1: £57.93
7In Stock

Mfr. Part No.
M85049/1720W06

Mouser Part No
523-85049/1720W06

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 20

Learn More

Datasheet

7In Stock

£57.93

£53.77

£47.33

£45.23

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 24

M85049/1724W06A
Amphenol PCD
1: £67.65
22In Stock

Mfr. Part No.
M85049/1724W06A

Mouser Part No
523-85049/1724W06A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 24

Learn More

Datasheet

22In Stock

£67.65

£61.69

£59.31

£57.33

£54.16

Min.: 1
Mult.: 1

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

M85049/1813W04A
Amphenol PCD
1: £53.94
12In Stock

Mfr. Part No.
M85049/1813W04A

Mouser Part No
523-85049/1813W04A

Amphenol PCD

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

Learn More

Datasheet

12In Stock

£53.94

£49.66

£49.29

£46.15

View

Min.: 1
Mult.: 1

Backshells

Types of Connectors

Customer Service Office

Company

Resources

Support