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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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RoHS Compliant

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Part #

Circular MIL Spec Backshells 9 Backshell Env

M85049/9-19W
Amphenol PCD
1: $71.72
1In Stock

Mfr. Part #
M85049/9-19W

Mouser Part #
523-85049/9-19W

Circular MIL Spec Backshells 9 Backshell Env

Datasheet

1In Stock

$71.72

$70.53

$70.52

$70.33

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

M85049/9-21W
Amphenol PCD
1: $109.60
15In Stock

Mfr. Part #
M85049/9-21W

Mouser Part #
523-85049/9-21W

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

Datasheet

15In Stock

$109.60

$97.44

$97.32

$94.96

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 9 Backshell Env

M85049/9-40W
Amphenol PCD
1: $69.67
11In Stock

Mfr. Part #
M85049/9-40W

Mouser Part #
523-85049/9-40W

Circular MIL Spec Backshells 9 Backshell Env

Datasheet

11In Stock

$69.67

$62.63

$53.63

$52.54

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

M85049/9-4W
Amphenol PCD
1: $65.22
4In Stock
25Expected 2026-03-05

Mfr. Part #
M85049/9-4W

Mouser Part #
523-85049/9-4W

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

Datasheet

4In Stock

25Expected 2026-03-05

$65.22

$59.20

$51.45

$50.73

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

M85049/9-57W
Amphenol PCD
1: $64.10
4In Stock

Mfr. Part #
M85049/9-57W

Mouser Part #
523-85049/9-57W

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

Datasheet

4In Stock

$64.10

$63.87

$63.86

$63.75

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

M85049/9-5W
Amphenol PCD
1: $59.83
22In Stock

Mfr. Part #
M85049/9-5W

Mouser Part #
523-85049/9-5W

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

Datasheet

22In Stock

$59.83

$54.88

$49.86

$49.84

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

M85049/9-61W
Amphenol PCD
1: $109.58
12In Stock

Mfr. Part #
M85049/9-61W

Mouser Part #
523-85049/9-61W

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

Datasheet

12In Stock

$109.58

$99.91

$90.18

$85.53

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

M85049/9-6W
Amphenol PCD
1: $67.25
18In Stock

Mfr. Part #
M85049/9-6W

Mouser Part #
523-85049/9-6W

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

Datasheet

18In Stock

$67.25

$60.19

$60.17

$58.74

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR R/A CAD SZ 13

M85049/90-13W03
Amphenol PCD
1: $102.85
12In Stock
200On Order

Mfr. Part #
M85049/90-13W03

Mouser Part #
523-85049/90-13W03

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR R/A CAD SZ 13

Datasheet

12In Stock

200On Order

$102.85

$91.58

$88.95

$87.82

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 90 Backshell Band Lock

M85049/90-15W02
Amphenol PCD
1: $105.61
Non-Stocked Lead-Time 12 Weeks

Mfr. Part #
M85049/90-15W02

Mouser Part #
523-85049/90-15W02

Circular MIL Spec Backshells 90 Backshell Band Lock

Datasheet

Non-Stocked Lead-Time 12 Weeks

$105.61

$98.39

$91.93

$88.37

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR R/A CAD SZ 15

M85049/90-15W03
Amphenol PCD
1: $92.71
22In Stock
100Expected 2026-04-23

Mfr. Part #
M85049/90-15W03

Mouser Part #
523-85049/90-15W03

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR R/A CAD SZ 15

Datasheet

22In Stock

100Expected 2026-04-23

$92.71

$82.81

$78.58

$75.64

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR R/A CAD SZ 25

M85049/90-25W03
Amphenol PCD
1: $145.10
11In Stock
100On Order

Mfr. Part #
M85049/90-25W03

Mouser Part #
523-85049/90-25W03

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR R/A CAD SZ 25

Datasheet

11In Stock

100On Order

$145.10

$138.47

$120.42

$114.68

$109.84

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BShell SRStrt SL ODC SZ08

M85049/121S08W
Amphenol PCD
1: $74.29
14In Stock

Mfr. Part #
M85049/121S08W

Mouser Part #
523-85049121S08W

Circular MIL Spec Backshells BShell SRStrt SL ODC SZ08

Datasheet

14In Stock

$74.29

$67.65

$57.49

$57.06

Quote

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 124 Backshell Strain Relief Clamp

M85049/124S21W
Amphenol PCD
1: $66.65
30In Stock

Mfr. Part #
M85049/124S21W

Mouser Part #
523-85049124S21W

Circular MIL Spec Backshells 124 Backshell Strain Relief Clamp

Datasheet

30In Stock

$66.65

$65.90

$65.88

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 124 Backshell Strain Relief Clamp

M85049/124S23W
Amphenol PCD
1: $71.55
2In Stock

Mfr. Part #
M85049/124S23W

Mouser Part #
523-85049124S23W

Circular MIL Spec Backshells 124 Backshell Strain Relief Clamp

Datasheet

2In Stock

$71.55

$70.23

$70.21

$60.71

Quote

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells Backshell;Individual Shield;CAD

M85049/30-12W
Amphenol PCD
1: $113.05
24In Stock
New Product

Mfr. Part #
M85049/30-12W

Mouser Part #
523-M85049/30-12W

New Product

Circular MIL Spec Backshells Backshell;Individual Shield;CAD

Datasheet

24In Stock

$113.05

$105.15

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL

M85049/69-11Z
Amphenol PCD
1: $30.85
16In Stock
50Expected 2026-05-07

Mfr. Part #
M85049/69-11Z

Mouser Part #
523-M85049/69-11Z

Circular MIL Spec Backshells BACKSHELL

Datasheet

16In Stock

50Expected 2026-05-07

$30.85

$26.74

$25.34

$24.97

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1811Z03
Amphenol PCD
1: $109.37
2In Stock
25Expected 2026-03-04

Mfr. Part #
M85049/1811Z03

Mouser Part #
523-M850491811Z03

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

Datasheet

2In Stock

25Expected 2026-03-04

$109.37

$94.23

$88.32

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Backshell;Env-EMI/RFI;BZN

M85049/1813Z03
Amphenol PCD
1: $111.52
19In Stock
25Expected 2026-03-26

Mfr. Part #
M85049/1813Z03

Mouser Part #
523-M850491813Z03

Circular MIL Spec Backshells Backshell;Env-EMI/RFI;BZN

Datasheet

19In Stock

25Expected 2026-03-26

$111.52

$99.13

$95.31

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELLS

M85049/1813Z04
Amphenol PCD
1: $114.80
12In Stock

Mfr. Part #
M85049/1813Z04

Mouser Part #
523-M850491813Z04

Circular MIL Spec Backshells BACKSHELLS

Datasheet

12In Stock

$114.80

$102.05

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Backshell;Env-EMI/RFI;BZN

M85049/1817Z03A
Amphenol PCD
1: $121.68
25In Stock

Mfr. Part #
M85049/1817Z03A

Mouser Part #
523-M850491817Z03A

Circular MIL Spec Backshells Backshell;Env-EMI/RFI;BZN

Datasheet

25In Stock

$121.68

$109.45

$105.24

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Backshell;Env-EMI/RFI;BZN

M85049/1821Z05B
Amphenol PCD
1: $133.08
21In Stock

Mfr. Part #
M85049/1821Z05B

Mouser Part #
523-M850491821Z05B

Circular MIL Spec Backshells Backshell;Env-EMI/RFI;BZN

Datasheet

21In Stock

$133.08

$119.70

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Backshell;Env-EMI/RFI;BZN

M85049/1825Z06
Amphenol PCD
Non-Stocked Lead-Time 12 Weeks

Mfr. Part #
M85049/1825Z06

Mouser Part #
523-M850491825Z06

Circular MIL Spec Backshells Backshell;Env-EMI/RFI;BZN

Datasheet

Non-Stocked Lead-Time 12 Weeks

Quote

Circular MIL Spec Backshells Backshell;Env-EMI/RFI;BZN

M85049/1825Z06A
Amphenol PCD
1: $148.23
2In Stock

Mfr. Part #
M85049/1825Z06A

Mouser Part #
523-M850491825Z06A

Circular MIL Spec Backshells Backshell;Env-EMI/RFI;BZN

Datasheet

2In Stock

$148.23

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Backshell;Non Env-EMI/RFI;BZN

M85049/199Z02
Amphenol PCD
1: $94.60
16In Stock

Mfr. Part #
M85049/199Z02

Mouser Part #
523-M850491909Z02

Circular MIL Spec Backshells Backshell;Non Env-EMI/RFI;BZN

Datasheet

16In Stock

$94.60

$82.05

View

Min.: 1
Mult.: 1