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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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Results: 11,097

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RoHS Compliant

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Part #

Circular MIL Spec Backshells 10 Backshell Env-EMI/RFI

M85049/10-118W
Amphenol PCD
1: $159.19
24Expected 2026-03-05

Mfr. Part #
M85049/10-118W

Mouser Part #
523-85049/10-118W

Circular MIL Spec Backshells 10 Backshell Env-EMI/RFI

Datasheet

24Expected 2026-03-05

$159.19

$146.39

$128.80

$116.89

View

Min.: 1
Mult.: 1

No

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

M85049/10-16W
Amphenol PCD
1: $188.41
20Expected 2026-05-12

Mfr. Part #
M85049/10-16W

Mouser Part #
523-85049/10-16W

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

Datasheet

20Expected 2026-05-12

$188.41

$172.92

$166.26

$160.71

$151.84

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 14

M85049/10-17W
Amphenol PCD
1: $121.60
23Expected 2026-04-15

Mfr. Part #
M85049/10-17W

Mouser Part #
523-85049/10-17W

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 14

Datasheet

23Expected 2026-04-15

$121.60

$110.31

$106.33

$96.83

Min.: 1
Mult.: 1

No

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

M85049/10-22W
Amphenol PCD
1: $140.41
23Expected 2026-03-02

Mfr. Part #
M85049/10-22W

Mouser Part #
523-85049/10-22W

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

Datasheet

23Expected 2026-03-02

$140.41

$134.37

$109.58

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 10 Backshell Env-EMI/RFI

M85049/10-31W
Amphenol PCD
1: $129.63
25Expected 2026-06-01

Mfr. Part #
M85049/10-31W

Mouser Part #
523-85049/10-31W

Circular MIL Spec Backshells 10 Backshell Env-EMI/RFI

Datasheet

25Expected 2026-06-01

$129.63

$123.78

$122.49

$117.98

Quote

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 10 Backshell Env-EMI/RFI

M85049/10-39W
Amphenol PCD
1: $160.48
18Expected 2026-03-05

Mfr. Part #
M85049/10-39W

Mouser Part #
523-85049/10-39W

Circular MIL Spec Backshells 10 Backshell Env-EMI/RFI

Datasheet

18Expected 2026-03-05

$160.48

$149.17

$134.22

$130.18

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 10 Backshell Env-EMI/RFI

M85049/10-41W
Amphenol PCD
1: $145.50
25Expected 2026-05-12

Mfr. Part #
M85049/10-41W

Mouser Part #
523-85049/10-41W

Circular MIL Spec Backshells 10 Backshell Env-EMI/RFI

Datasheet

25Expected 2026-05-12

$145.50

$137.24

$130.21

$129.15

View

Min.: 1
Mult.: 1

No

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

M85049/10-52W
Amphenol PCD
1: $173.98
24Expected 2026-03-09

Mfr. Part #
M85049/10-52W

Mouser Part #
523-85049/10-52W

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

Datasheet

24Expected 2026-03-09

$173.98

$159.67

$137.18

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-116W
Amphenol PCD
1: $96.87
45Expected 2026-05-11

Mfr. Part #
M85049/11-116W

Mouser Part #
523-85049/11-116W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Datasheet

45Expected 2026-05-11

$96.87

$90.14

$77.55

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 11 Backshell Env

M85049/11-17W
Amphenol PCD
1: $109.75
59On Order

Mfr. Part #
M85049/11-17W

Mouser Part #
523-85049/11-17W

Circular MIL Spec Backshells 11 Backshell Env

Datasheet

59On Order

$109.75

$92.35

$86.56

$82.43

$78.50

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-57W
Amphenol PCD
1: $145.79
23Expected 2026-03-05

Mfr. Part #
M85049/11-57W

Mouser Part #
523-85049/11-57W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Datasheet

23Expected 2026-03-05

$145.79

$143.34

$143.32

$141.91

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 08

M85049/1708W02
Amphenol PCD
1: $89.67
47Expected 2026-03-05

Mfr. Part #
M85049/1708W02

Mouser Part #
523-85049/1708W02

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 08

Datasheet

47Expected 2026-03-05

$89.67

$82.68

$72.94

Quote

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 14

M85049/1714W04
Amphenol PCD
1: $110.89
25Expected 2026-05-28

Mfr. Part #
M85049/1714W04

Mouser Part #
523-85049/1714W04

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 14

Datasheet

25Expected 2026-05-28

$110.89

$98.56

$94.77

$91.61

$86.56

Min.: 1
Mult.: 1

No

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

M85049/1716W06A
Amphenol PCD
1: $124.04
25Expected 2026-03-16

Mfr. Part #
M85049/1716W06A

Mouser Part #
523-85049/1716W06A

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

Datasheet

25Expected 2026-03-16

$124.04

$114.85

$100.77

$100.39

View

Min.: 1
Mult.: 1

No

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

M85049/1720W07
Amphenol PCD
1: $124.15
136Expected 2026-03-23

Mfr. Part #
M85049/1720W07

Mouser Part #
523-85049/1720W07

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

Datasheet

136Expected 2026-03-23

$124.15

$111.67

$98.92

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 22

M85049/1722W06
Amphenol PCD
1: $131.96
71Expected 2026-07-15

Mfr. Part #
M85049/1722W06

Mouser Part #
523-85049/1722W06

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 22

Datasheet

71Expected 2026-07-15

$131.96

$131.95

$131.80

$124.44

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 11

M85049/1811W02
Amphenol PCD
1: $85.25
94On Order

Mfr. Part #
M85049/1811W02

Mouser Part #
523-85049/1811W02

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 11

Datasheet

94On Order

$85.25

$72.47

$72.45

$71.95

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1813W03
Amphenol PCD
1: $82.95
20In Stock
150On Order

Mfr. Part #
M85049/1813W03

Mouser Part #
523-85049/1813W03

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

Datasheet

20In Stock

150On Order

$82.95

$74.83

$74.82

$73.19

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1813W03A
Amphenol PCD
1: $139.13
100On Order

Mfr. Part #
M85049/1813W03A

Mouser Part #
523-85049/1813W03A

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

Datasheet

100On Order

$139.13

$95.25

$91.56

$88.51

View

Min.: 1
Mult.: 1

No

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

M85049/1817W03
Amphenol PCD
1: $101.14
88On Order

Mfr. Part #
M85049/1817W03

Mouser Part #
523-85049/1817W03

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

Datasheet

88On Order

$101.14

$89.37

$87.45

$84.49

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1821W05
Amphenol PCD
1: $119.65
50On Order

Mfr. Part #
M85049/1821W05

Mouser Part #
523-85049/1821W05

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

Datasheet

50On Order

$119.65

$101.72

$95.34

$90.80

$86.47

Min.: 1
Mult.: 1

No

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

M85049/1821W06
Amphenol PCD
1: $115.42
26On Order

Mfr. Part #
M85049/1821W06

Mouser Part #
523-85049/1821W06

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

Datasheet

26On Order

$115.42

$103.64

$95.69

$92.51

View

Min.: 1
Mult.: 1

No

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

M85049/1821W07
Amphenol PCD
1: $124.10
118On Order

Mfr. Part #
M85049/1821W07

Mouser Part #
523-85049/1821W07

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

Datasheet

118On Order

$124.10

$105.53

$98.92

$94.20

$89.71

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1823W03
Amphenol PCD
1: $123.12
45On Order

Mfr. Part #
M85049/1823W03

Mouser Part #
523-85049/1823W03

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

Datasheet

45On Order

$123.12

$104.73

$98.16

$93.48

$89.03

Min.: 1
Mult.: 1

No

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

M85049/1823W04
Amphenol PCD
1: $122.14
22Expected 2026-03-05

Mfr. Part #
M85049/1823W04

Mouser Part #
523-85049/1823W04

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

Datasheet

22Expected 2026-03-05

$122.14

$106.65

$99.97

$95.20

$90.66

Min.: 1
Mult.: 1

No