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RoHS

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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 11 Backshell Env

M85049/11-17W
Amphenol PCD
1: $96.67
50Expected 26/11/2026

Mfr. Part No.
M85049/11-17W

Mouser Part No
523-85049/11-17W

Circular MIL Spec Backshells 11 Backshell Env

Datasheet

50Expected 26/11/2026

$96.67

$81.74

$78.64

$75.45

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-41W
Amphenol PCD
1: $120.44
25Expected 22/10/2026

Mfr. Part No.
M85049/11-41W

Mouser Part No
523-85049/11-41W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Datasheet

25Expected 22/10/2026

$120.44

$102.38

$95.98

$91.39

$87.04

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 11 Backshell Env

M85049/11-43W
Amphenol PCD
1: $97.81
25Expected 29/9/2026

Mfr. Part No.
M85049/11-43W

Mouser Part No
523-85049/11-43W

Circular MIL Spec Backshells 11 Backshell Env

Datasheet

25Expected 29/9/2026

$97.81

$97.80

$96.38

$91.27

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-59W
Amphenol PCD
1: $150.59
25Expected 15/10/2026

Mfr. Part No.
M85049/11-59W

Mouser Part No
523-85049/11-59W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Datasheet

25Expected 15/10/2026

$150.59

$137.33

$134.25

$124.51

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-65W
Amphenol PCD
1: $180.88
22Expected 7/12/2026

Mfr. Part No.
M85049/11-65W

Mouser Part No
523-85049/11-65W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Datasheet

22Expected 7/12/2026

$180.88

$166.00

$162.25

$160.64

Quote

Min.: 1
Mult.: 1

No

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

M85049/1716W03
Amphenol PCD
1: $98.82
25Expected 5/11/2026

Mfr. Part No.
M85049/1716W03

Mouser Part No
523-85049/1716W03

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

Datasheet

25Expected 5/11/2026

$98.82

$87.84

$85.84

$82.27

View

Min.: 1
Mult.: 1

No

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

M85049/1722W04
Amphenol PCD
1: $112.59
22Expected 7/12/2026

Mfr. Part No.
M85049/1722W04

Mouser Part No
523-85049/1722W04

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

Datasheet

22Expected 7/12/2026

$112.59

$100.10

$97.82

$94.18

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 15

M85049/1815W04A
Amphenol PCD
1: $98.23
48Expected 28/10/2026

Mfr. Part No.
M85049/1815W04A

Mouser Part No
523-85049/1815W04A

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 15

Datasheet

48Expected 28/10/2026

$98.23

$95.17

$86.24

$85.16

View

Min.: 1
Mult.: 1

No

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

M85049/1817W05
Amphenol PCD
1: $106.37
150Expected 24/11/2026

Mfr. Part No.
M85049/1817W05

Mouser Part No
523-85049/1817W05

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

Datasheet

150Expected 24/11/2026

$106.37

$92.00

$82.13

$78.21

Min.: 1
Mult.: 1

No

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

M85049/1821W07A
Amphenol PCD
1: $113.52
25Expected 26/11/2026

Mfr. Part No.
M85049/1821W07A

Mouser Part No
523-85049/1821W07A

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

Datasheet

25Expected 26/11/2026

$113.52

$100.91

$97.44

$96.30

View

Min.: 1
Mult.: 1

No

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

M85049/1825W07A
Amphenol PCD
1: $119.49
24Expected 18/9/2026

Mfr. Part No.
M85049/1825W07A

Mouser Part No
523-85049/1825W07A

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

Datasheet

24Expected 18/9/2026

$119.49

$111.51

$99.74

Min.: 1
Mult.: 1

No

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

M85049/1825W08
Amphenol PCD
1: $130.19
88On Order

Mfr. Part No.
M85049/1825W08

Mouser Part No
523-85049/1825W08

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

Datasheet

88On Order

$130.19

$110.68

$103.74

$98.79

$94.08

Min.: 1
Mult.: 1

No

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

M85049/1917W05
Amphenol PCD
1: $97.32
150On Order

Mfr. Part No.
M85049/1917W05

Mouser Part No
523-85049/1917W05

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

Datasheet

150On Order

$97.32

$80.82

$78.47

$74.73

$71.17

Min.: 1
Mult.: 1

No

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

M85049/1919W07
Amphenol PCD
1: $97.00
142On Order

Mfr. Part No.
M85049/1919W07

Mouser Part No
523-85049/1919W07

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

Datasheet

142On Order

$97.00

$84.32

$83.63

$79.34

View

Min.: 1
Mult.: 1

No

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

M85049/1923W07
Amphenol PCD
1: $108.12
50On Order

Mfr. Part No.
M85049/1923W07

Mouser Part No
523-85049/1923W07

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

Datasheet

50On Order

$108.12

$96.11

$93.92

$87.31

View

Min.: 1
Mult.: 1

No

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

M85049/1923W09
Amphenol PCD
1: $109.15
24Expected 13/10/2026

Mfr. Part No.
M85049/1923W09

Mouser Part No
523-85049/1923W09

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

Datasheet

24Expected 13/10/2026

$109.15

$105.77

$97.72

$96.68

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL CRIMP RING ADPTR ST CAD SZ 21

M85049/20-21W
Amphenol PCD
1: $32.38
100Expected 30/11/2026

Mfr. Part No.
M85049/20-21W

Mouser Part No
523-85049/20-21W

Circular MIL Spec Backshells BACKSHELL CRIMP RING ADPTR ST CAD SZ 21

Datasheet

100Expected 30/11/2026

$32.38

$32.07

$29.12

$28.30

View

Min.: 1
Mult.: 1

No

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

M85049/25-11W
Amphenol PCD
1: $131.20
25Expected 18/9/2026

Mfr. Part No.
M85049/25-11W

Mouser Part No
523-85049/25-11W

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

Datasheet

25Expected 18/9/2026

$131.20

$117.27

$114.53

$112.38

View

Min.: 1
Mult.: 1

No

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

M85049/25-47W
Amphenol PCD
1: $107.97
42Expected 16/9/2026

Mfr. Part No.
M85049/25-47W

Mouser Part No
523-85049/25-47W

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

Datasheet

42Expected 16/9/2026

$107.97

$107.96

$103.39

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG OD CAD

M85049/6-59W
Amphenol PCD
1: $92.77
32On Order

Mfr. Part No.
M85049/6-59W

Mouser Part No
523-85049/6-59W

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG OD CAD

Datasheet

32On Order

$92.77

$87.62

$87.61

$86.77

View

Min.: 1
Mult.: 1

No

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

M85049/76-14W03
Amphenol PCD
1: $120.39
25Expected 18/9/2026

Mfr. Part No.
M85049/76-14W03

Mouser Part No
523-85049/76-14W03

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

Datasheet

25Expected 18/9/2026

$120.39

$107.02

$104.58

$96.23

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL EMI/RFI 45 DEG OD CAD SZ 09

M85049/78-17W02
Amphenol PCD
1: $114.00
25Expected 9/12/2026

Mfr. Part No.
M85049/78-17W02

Mouser Part No
523-85049/78-17W02

Circular MIL Spec Backshells BACKSHELL EMI/RFI 45 DEG OD CAD SZ 09

Datasheet

25Expected 9/12/2026

$114.00

$101.33

$99.04

$94.25

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL EMI/RFI 45 DEG OD CAD SZ 09

M85049/78-17W05
Amphenol PCD
1: $121.42
25Expected 17/9/2026

Mfr. Part No.
M85049/78-17W05

Mouser Part No
523-85049/78-17W05

Circular MIL Spec Backshells BACKSHELL EMI/RFI 45 DEG OD CAD SZ 09

Datasheet

25Expected 17/9/2026

$121.42

$110.72

$101.46

$98.94

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL EMI/RFI 45 DEG OD CAD SZ 09

M85049/78-25W10
Amphenol PCD
1: $156.67
25Expected 11/9/2026

Mfr. Part No.
M85049/78-25W10

Mouser Part No
523-85049/78-25W10

Circular MIL Spec Backshells BACKSHELL EMI/RFI 45 DEG OD CAD SZ 09

Datasheet

25Expected 11/9/2026

$156.67

$133.18

$124.83

$118.89

$113.22

Min.: 1
Mult.: 1

No

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

M85049/79-21W03
Amphenol PCD
1: $112.23
25Expected 8/10/2026

Mfr. Part No.
M85049/79-21W03

Mouser Part No
523-85049/79-21W03

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

Datasheet

25Expected 8/10/2026

$112.23

$111.25

$104.27

$99.29

View

Min.: 1
Mult.: 1

No