Connectors – Mouser Canada

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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 BACKSHELL NON ENV EMI/RFI ST NICKEL

M85049/25-31N
Amphenol PCD
1: $113.22
24In Stock

Mfr. Part #
M85049/25-31N

Mouser Part #
523-85049/25-31N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NICKEL

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Datasheet

24In Stock

$113.22

$102.48

$102.46

$101.17

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 10

M85049/27-10N
Amphenol PCD
1: $19.60
2In Stock
25Expected 2026-03-23

Mfr. Part #
M85049/27-10N

Mouser Part #
523-85049/27-10N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 10

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Datasheet

2In Stock

25Expected 2026-03-23

$19.60

$17.81

$15.43

$14.75

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 14

M85049/27-14N
Amphenol PCD
1: $19.63
17In Stock

Mfr. Part #
M85049/27-14N

Mouser Part #
523-85049/27-14N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 14

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Datasheet

17In Stock

$19.63

$17.90

$17.42

$15.80

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells 27 Backshell Grommet Nut

M85049/27-16N
Amphenol PCD
1: $18.57
5In Stock

Mfr. Part #
M85049/27-16N

Mouser Part #
523-85049/27-16N

Amphenol PCD

Circular MIL Spec Backshells 27 Backshell Grommet Nut

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Datasheet

5In Stock

$18.57

$16.49

$15.00

$13.83

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 18

M85049/27-18N
Amphenol PCD
1: $18.74
19In Stock

Mfr. Part #
M85049/27-18N

Mouser Part #
523-85049/27-18N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 18

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Datasheet

19In Stock

$18.74

$17.13

$15.37

$15.06

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 20

M85049/27-20N
Amphenol PCD
1: $18.14
2In Stock

Mfr. Part #
M85049/27-20N

Mouser Part #
523-85049/27-20N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 20

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Datasheet

2In Stock

$18.14

$16.75

$16.24

$13.69

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 22

M85049/27-22N
Amphenol PCD
1: $23.65
4In Stock

Mfr. Part #
M85049/27-22N

Mouser Part #
523-85049/27-22N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 22

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Datasheet

4In Stock

$23.65

$20.97

$20.17

$19.17

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 24

M85049/27-24N
Amphenol PCD
1: $20.37
21In Stock

Mfr. Part #
M85049/27-24N

Mouser Part #
523-85049/27-24N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 24

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Datasheet

21In Stock

$20.37

$19.19

$16.29

$15.17

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 08

M85049/27-8N
Amphenol PCD
1: $20.55
27In Stock

Mfr. Part #
M85049/27-8N

Mouser Part #
523-85049/27-8N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 08

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Datasheet

27In Stock

$20.55

$18.22

$17.51

$16.65

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL NIC SZ 12

M85049/27S12N
Amphenol PCD
1: $30.64
23In Stock

Mfr. Part #
M85049/27S12N

Mouser Part #
523-85049/27S12N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST SL NIC SZ 12

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Datasheet

23In Stock

$30.64

$26.05

$24.41

$23.24

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 10

M85049/2910A02A
Amphenol PCD
1: $59.17
1In Stock
25Expected 2026-05-12

Mfr. Part #
M85049/2910A02A

Mouser Part #
523-85049/2910A02A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 10

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Datasheet

1In Stock

25Expected 2026-05-12

$59.17

$51.45

$49.23

$47.65

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 10

M85049/2910N03
Amphenol PCD
1: $59.19
15In Stock

Mfr. Part #
M85049/2910N03

Mouser Part #
523-85049/2910N03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 10

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Datasheet

15In Stock

$59.19

$54.74

$46.51

$46.05

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 12

M85049/2912N04
Amphenol PCD
1: $60.83
21In Stock

Mfr. Part #
M85049/2912N04

Mouser Part #
523-85049/2912N04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 12

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Datasheet

21In Stock

$60.83

$52.88

$50.59

$48.97

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells 29 Backshell Non Env

M85049/2914N04
Amphenol PCD
1: $62.41
19In Stock

Mfr. Part #
M85049/2914N04

Mouser Part #
523-85049/2914N04

Amphenol PCD

Circular MIL Spec Backshells 29 Backshell Non Env

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Datasheet

19In Stock

$62.41

$54.26

$51.91

$50.24

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 14

M85049/2914N05
Amphenol PCD
1: $70.27
18In Stock

Mfr. Part #
M85049/2914N05

Mouser Part #
523-85049/2914N05

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 14

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Datasheet

18In Stock

$70.27

$62.17

$58.64

$53.00

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 14

M85049/2914N05A
Amphenol PCD
1: $65.50
6In Stock

Mfr. Part #
M85049/2914N05A

Mouser Part #
523-85049/2914N05A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 14

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Datasheet

6In Stock

$65.50

$55.67

$52.17

$49.69

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 16

M85049/2916N02
Amphenol PCD
1: $58.16
1In Stock

Mfr. Part #
M85049/2916N02

Mouser Part #
523-85049/2916N02

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 16

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Datasheet

1In Stock

$58.16

$53.77

$45.70

$45.24

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 16

M85049/2916N04
Amphenol PCD
1: $64.13
22In Stock

Mfr. Part #
M85049/2916N04

Mouser Part #
523-85049/2916N04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 16

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Datasheet

22In Stock

$64.13

$55.77

$50.62

$49.84

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells 29 Backshell Non Env

M85049/2918N07A
Amphenol PCD
1: $71.90
10In Stock

Mfr. Part #
M85049/2918N07A

Mouser Part #
523-85049/2918N07A

Amphenol PCD

Circular MIL Spec Backshells 29 Backshell Non Env

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Datasheet

10In Stock

$71.90

$62.52

$56.21

$54.15

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 18

M85049/2918N07B
Amphenol PCD
1: $72.65
26In Stock

Mfr. Part #
M85049/2918N07B

Mouser Part #
523-85049/2918N07B

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 18

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Datasheet

26In Stock

$72.65

$62.04

$59.63

$57.78

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 20

M85049/2920N04A
Amphenol PCD
1: $67.59
5In Stock

Mfr. Part #
M85049/2920N04A

Mouser Part #
523-85049/2920N04A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 20

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Datasheet

5In Stock

$67.59

$58.76

$56.23

$54.40

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 20

M85049/2920N05
Amphenol PCD
1: $67.60
6In Stock
19Expected 2026-03-23

Mfr. Part #
M85049/2920N05

Mouser Part #
523-85049/2920N05

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 20

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Datasheet

6In Stock

19Expected 2026-03-23

$67.60

$56.46

$53.13

$51.19

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 20

M85049/2920N08A
Amphenol PCD
1: $71.75
29In Stock

Mfr. Part #
M85049/2920N08A

Mouser Part #
523-85049/2920N08A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NICKEL SZ 20

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Datasheet

29In Stock

$71.75

$65.33

$55.52

$53.79

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells 31 Backshell Grommet Nut

M85049/31-10N
Amphenol PCD
1: $21.66
38In Stock

Mfr. Part #
M85049/31-10N

Mouser Part #
523-85049/31-10N

Amphenol PCD

Circular MIL Spec Backshells 31 Backshell Grommet Nut

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Datasheet

38In Stock

$21.66

$20.38

$17.30

$16.73

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 12

M85049/31-12N
Amphenol PCD
1: $22.10
11In Stock

Mfr. Part #
M85049/31-12N

Mouser Part #
523-85049/31-12N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 12

Learn More

Datasheet

11In Stock

$22.10

$19.63

$18.87

$17.55

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Min.: 1
Mult.: 1

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