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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 BACKSHELL ENV EMI/ RFI ST OD CAD SZ 12

M85049/10-14W
Amphenol PCD
1: $104.40
12In Stock

Mfr. Part No.
M85049/10-14W

Mouser Part No
523-85049/10-14W

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

Datasheet

12In Stock

$104.40

$97.24

$96.73

$92.85

View

Min.: 1
Mult.: 1

No

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

M85049/10-15W
Amphenol PCD
1: $195.53
11In Stock

Mfr. Part No.
M85049/10-15W

Mouser Part No
523-85049/10-15W

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

Datasheet

11In Stock

$195.53

$177.06

$157.65

$142.53

View

Min.: 1
Mult.: 1

No

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

M85049/10-23W
Amphenol PCD
1: $185.04
2In Stock

Mfr. Part No.
M85049/10-23W

Mouser Part No
523-85049/10-23W

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

Datasheet

2In Stock

$185.04

$184.98

$184.97

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 18

M85049/10-25W
Amphenol PCD
1: $132.97
14In Stock
25Expected 11/5/2026

Mfr. Part No.
M85049/10-25W

Mouser Part No
523-85049/10-25W

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 18

Datasheet

14In Stock

25Expected 11/5/2026

$132.97

$121.60

$110.74

$102.76

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 18

M85049/10-27W
Amphenol PCD
1: $125.78
3In Stock

Mfr. Part No.
M85049/10-27W

Mouser Part No
523-85049/10-27W

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 18

Datasheet

3In Stock

$125.78

$118.34

$108.23

$102.96

Quote

Min.: 1
Mult.: 1

No

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

M85049/10-32W
Amphenol PCD
1: $161.17
2In Stock
25Expected 25/5/2026

Mfr. Part No.
M85049/10-32W

Mouser Part No
523-85049/10-32W

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

Datasheet

2In Stock

25Expected 25/5/2026

$161.17

$145.19

$128.88

$119.65

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 10 Backshell Env-EMI/RFI

M85049/10-47W
Amphenol PCD
1: $180.98
8In Stock

Mfr. Part No.
M85049/10-47W

Mouser Part No
523-85049/10-47W

Circular MIL Spec Backshells 10 Backshell Env-EMI/RFI

Datasheet

8In Stock

$180.98

$163.94

$147.45

$132.51

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 10 Backshell Env-EMI/RFI

M85049/10-65W
Amphenol PCD
1: $220.55
3In Stock
25Expected 18/5/2026

Mfr. Part No.
M85049/10-65W

Mouser Part No
523-85049/10-65W

Circular MIL Spec Backshells 10 Backshell Env-EMI/RFI

Datasheet

3In Stock

25Expected 18/5/2026

$220.55

$202.23

$178.75

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 36

M85049/10-75W
Amphenol PCD
1: $257.83
3In Stock
25Expected 28/5/2026

Mfr. Part No.
M85049/10-75W

Mouser Part No
523-85049/10-75W

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 36

Datasheet

3In Stock

25Expected 28/5/2026

$257.83

$257.82

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 40

M85049/10-79W
Amphenol PCD
1: $302.35
19In Stock

Mfr. Part No.
M85049/10-79W

Mouser Part No
523-85049/10-79W

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 40

Datasheet

19In Stock

$302.35

$302.34

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-10W
Amphenol PCD
1: $91.64
12In Stock

Mfr. Part No.
M85049/11-10W

Mouser Part No
523-85049/11-10W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Datasheet

12In Stock

$91.64

$83.50

$83.48

$83.21

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD SZ 16

M85049/11-118W
Amphenol PCD
1: $97.33
20In Stock

Mfr. Part No.
M85049/11-118W

Mouser Part No
523-85049/11-118W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD SZ 16

Datasheet

20In Stock

$97.33

$90.67

$83.23

$77.71

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-11W
Amphenol PCD
1: $153.68
13In Stock

Mfr. Part No.
M85049/11-11W

Mouser Part No
523-85049/11-11W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Datasheet

13In Stock

$153.68

$141.71

$116.23

$107.82

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-148W
Amphenol PCD
1: $223.48
21In Stock

Mfr. Part No.
M85049/11-148W

Mouser Part No
523-85049/11-148W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Datasheet

21In Stock

$223.48

$205.11

$171.01

Quote

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-154W
Amphenol PCD
1: $302.56
25In Stock

Mfr. Part No.
M85049/11-154W

Mouser Part No
523-85049/11-154W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Datasheet

25In Stock

$302.56

$269.17

$255.09

Quote

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 11 Backshell Env

M85049/11-15W
Amphenol PCD
1: $116.20
8In Stock

Mfr. Part No.
M85049/11-15W

Mouser Part No
523-85049/11-15W

Circular MIL Spec Backshells 11 Backshell Env

Datasheet

8In Stock

$116.20

$116.19

Quote

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-21W
Amphenol PCD
1: $124.95
8In Stock
25Expected 23/4/2026

Mfr. Part No.
M85049/11-21W

Mouser Part No
523-85049/11-21W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Datasheet

8In Stock

25Expected 23/4/2026

$124.95

$108.41

$99.97

$76.62

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 45 Deg EMI/RFI Environmental Backshell

M85049/11-28W
Amphenol PCD
1: $107.25
1In Stock

Mfr. Part No.
M85049/11-28W

Mouser Part No
523-85049/11-28W

Circular MIL Spec Backshells 45 Deg EMI/RFI Environmental Backshell

Datasheet

1In Stock

$107.25

$96.34

$84.30

$82.80

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 11 Backshell Env

M85049/11-31W
Amphenol PCD
1: $126.05
2In Stock
25Expected 18/5/2026

Mfr. Part No.
M85049/11-31W

Mouser Part No
523-85049/11-31W

Circular MIL Spec Backshells 11 Backshell Env

Datasheet

2In Stock

25Expected 18/5/2026

$126.05

$115.48

$100.98

$93.35

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-41W
Amphenol PCD
1: $121.40
15In Stock

Mfr. Part No.
M85049/11-41W

Mouser Part No
523-85049/11-41W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Datasheet

15In Stock

$121.40

$109.87

$103.22

$95.03

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-51W
Amphenol PCD
1: $180.88
7In Stock

Mfr. Part No.
M85049/11-51W

Mouser Part No
523-85049/11-51W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Datasheet

7In Stock

$180.88

$106.40

$101.66

$96.81

$92.20

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 11 Backshell Env

M85049/11-55W
Amphenol PCD
1: $175.29
1In Stock
25Expected 23/4/2026

Mfr. Part No.
M85049/11-55W

Mouser Part No
523-85049/11-55W

Circular MIL Spec Backshells 11 Backshell Env

Datasheet

1In Stock

25Expected 23/4/2026

$175.29

$159.22

$140.47

$128.98

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-69W
Amphenol PCD
1: $192.20
1In Stock

Mfr. Part No.
M85049/11-69W

Mouser Part No
523-85049/11-69W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Datasheet

1In Stock

$192.20

$177.09

$177.07

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

M85049/11-09W
Amphenol PCD
1: $91.64
23In Stock

Mfr. Part No.
M85049/11-09W

Mouser Part No
523-85049/11-9W

Circular MIL Spec Backshells BACKSHELL ENV ST OD CAD

Datasheet

23In Stock

$91.64

$84.80

$73.68

$70.75

View

Min.: 1
Mult.: 1

No

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

M85049/14-13W
Amphenol PCD
1: $21.43
13In Stock

Mfr. Part No.
M85049/14-13W

Mouser Part No
523-85049/14-13W

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

Datasheet

13In Stock

$21.43

$19.00

$17.06

$16.75

View

Min.: 1
Mult.: 1

No