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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 NON ENV ST BLACK SZ 25

M85049/2125A10
Amphenol PCD
1: ¥10,010.8
20In Stock

Mfr. Part #
M85049/2125A10

Mouser Part #
523-85049/2125A10

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 25

Datasheet

20In Stock

¥10,010.8

¥8,682

¥8,486

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 25

M85049/2125N06A
Amphenol PCD
1: ¥9,295
14In Stock

Mfr. Part #
M85049/2125N06A

Mouser Part #
523-85049/2125N06A

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 25

Datasheet

14In Stock

¥9,295

¥7,971.1

¥7,595.8

¥7,233.7

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 25

M85049/2125N08A
Amphenol PCD
1: ¥9,721.8
9In Stock

Mfr. Part #
M85049/2125N08A

Mouser Part #
523-85049/2125N08A

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 25

Datasheet

9In Stock

¥9,721.8

¥8,429.6

¥8,238.6

¥7,869.8

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 25

M85049/2125N10
Amphenol PCD
1: ¥10,172
11In Stock

Mfr. Part #
M85049/2125N10

Mouser Part #
523-85049/2125N10

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 25

Datasheet

11In Stock

¥10,172

¥8,731.9

¥8,228.6

¥7,836.6

¥7,462.9

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 21 Backshell Non Env

M85049/219N01
Amphenol PCD
1: ¥6,607.5
30In Stock

Mfr. Part #
M85049/219N01

Mouser Part #
523-85049/219N01

Circular MIL Spec Backshells 21 Backshell Non Env

Datasheet

30In Stock

¥6,607.5

¥5,693.9

¥5,403.2

¥5,145.8

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 09

M85049/219N01A
Amphenol PCD
1: ¥6,738.7
1In Stock

Mfr. Part #
M85049/219N01A

Mouser Part #
523-85049/219N01A

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 09

Datasheet

1In Stock

¥6,738.7

¥5,516.2

¥5,514.5

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI R/A NIC

M85049/24-12N
Amphenol PCD
1: ¥7,308.4
12In Stock

Mfr. Part #
M85049/24-12N

Mouser Part #
523-85049/24-12N

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI R/A NIC

Datasheet

12In Stock

¥7,308.4

¥6,355

¥5,745.4

¥5,659

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI R/A NIC

M85049/24-19N
Amphenol PCD
1: ¥8,884.7
20In Stock

Mfr. Part #
M85049/24-19N

Mouser Part #
523-85049/24-19N

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI R/A NIC

Datasheet

20In Stock

¥8,884.7

¥7,723.7

¥7,268.5

¥7,039.3

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI R/A NIC

M85049/24-4N
Amphenol PCD
1: ¥6,639
23In Stock

Mfr. Part #
M85049/24-4N

Mouser Part #
523-85049/24-4N

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI R/A NIC

Datasheet

23In Stock

¥6,639

¥5,773.6

¥5,431.5

¥5,421.5

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI R/A NIC

M85049/24-56N
Amphenol PCD
1: ¥8,331.6
17In Stock

Mfr. Part #
M85049/24-56N

Mouser Part #
523-85049/24-56N

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI R/A NIC

Datasheet

17In Stock

¥8,331.6

¥7,243.6

¥6,816.7

¥6,703.8

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI R/A NIC

M85049/24-5N
Amphenol PCD
1: ¥6,416.4
4In Stock

Mfr. Part #
M85049/24-5N

Mouser Part #
523-85049/24-5N

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI R/A NIC

Datasheet

4In Stock

¥6,416.4

¥5,670.7

¥5,408.2

¥5,210.6

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI R/A NIC

M85049/24-6N
Amphenol PCD
1: ¥6,464.6
6In Stock

Mfr. Part #
M85049/24-6N

Mouser Part #
523-85049/24-6N

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI R/A NIC

Datasheet

6In Stock

¥6,464.6

¥5,685.6

¥5,516.2

¥5,358.4

View

Min.: 1
Mult.: 1

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

M85049/25-11N
Amphenol PCD
1: ¥14,608.5
17In Stock

Mfr. Part #
M85049/25-11N

Mouser Part #
523-85049/25-11N

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

Datasheet

17In Stock

¥14,608.5

¥13,321.2

¥13,018.9

View

Min.: 1
Mult.: 1

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

M85049/25-130N
Amphenol PCD
1: ¥12,696.7
4In Stock
25Expected 8/18/2026

Mfr. Part #
M85049/25-130N

Mouser Part #
523-85049/25-130N

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

Datasheet

4In Stock

25Expected 8/18/2026

¥12,696.7

¥12,578.8

¥12,577.1

¥12,542.2

View

Min.: 1
Mult.: 1

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

M85049/25-13N
Amphenol PCD
1: ¥10,372.9
3In Stock
25Expected 8/17/2026

Mfr. Part #
M85049/25-13N

Mouser Part #
523-85049/25-13N

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

Datasheet

3In Stock

25Expected 8/17/2026

¥10,372.9

¥9,107.3

¥8,677.1

¥8,303.3

¥7,908

Min.: 1
Mult.: 1

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

M85049/25-18N
Amphenol PCD
1: ¥11,108.8
15In Stock

Mfr. Part #
M85049/25-18N

Mouser Part #
523-85049/25-18N

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

Datasheet

15In Stock

¥11,108.8

¥9,633.8

¥9,414.5

¥9,027.5

View

Min.: 1
Mult.: 1

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

M85049/25-25N
Amphenol PCD
1: ¥12,053.9
9In Stock

Mfr. Part #
M85049/25-25N

Mouser Part #
523-85049/25-25N

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

Datasheet

9In Stock

¥12,053.9

¥10,230.1

¥10,218.5

¥9,397.9

View

Min.: 1
Mult.: 1

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

M85049/25-29N
Amphenol PCD
1: ¥15,030.4
24In Stock

Mfr. Part #
M85049/25-29N

Mouser Part #
523-85049/25-29N

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

Datasheet

24In Stock

¥15,030.4

¥15,028.7

¥14,789.5

¥14,170

View

Min.: 1
Mult.: 1

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

M85049/25-33N
Amphenol PCD
1: ¥12,244.9
9In Stock
25Expected 8/17/2026

Mfr. Part #
M85049/25-33N

Mouser Part #
523-85049/25-33N

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

Datasheet

9In Stock

25Expected 8/17/2026

¥12,244.9

¥10,884.5

¥10,642

¥10,235.1

View

Min.: 1
Mult.: 1

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

M85049/25-43N
Amphenol PCD
1: ¥13,319.6
17In Stock

Mfr. Part #
M85049/25-43N

Mouser Part #
523-85049/25-43N

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

Datasheet

17In Stock

¥13,319.6

¥11,839.6

¥10,505.8

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 10

M85049/27-10N
Amphenol PCD
1: ¥2,121.1
27In Stock

Mfr. Part #
M85049/27-10N

Mouser Part #
523-85049/27-10N

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 10

Datasheet

27In Stock

¥2,121.1

¥1,803.8

¥1,664.3

¥1,592.9

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 27 Backshell Grommet Nut

M85049/27-12N
Amphenol PCD
1: ¥1,875.3
19In Stock

Mfr. Part #
M85049/27-12N

Mouser Part #
523-85049/27-12N

Circular MIL Spec Backshells 27 Backshell Grommet Nut

Datasheet

19In Stock

¥1,875.3

¥1,657.7

¥1,589.6

¥1,443.4

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 14

M85049/27-14N
Amphenol PCD
1: ¥2,021.4
17In Stock

Mfr. Part #
M85049/27-14N

Mouser Part #
523-85049/27-14N

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 14

Datasheet

17In Stock

¥2,021.4

¥1,782.3

¥1,571.3

¥1,551.4

¥1,524.8

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 27 Backshell Grommet Nut

M85049/27-16N
Amphenol PCD
1: ¥1,966.6
5In Stock

Mfr. Part #
M85049/27-16N

Mouser Part #
523-85049/27-16N

Circular MIL Spec Backshells 27 Backshell Grommet Nut

Datasheet

5In Stock

¥1,966.6

¥1,687.6

¥1,513.2

¥1,458.4

¥1,367

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 18

M85049/27-18N
Amphenol PCD
1: ¥2,036.4
18In Stock

Mfr. Part #
M85049/27-18N

Mouser Part #
523-85049/27-18N

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NICKEL SZ 18

Datasheet

18In Stock

¥2,036.4

¥1,852

¥1,592.9

¥1,582.9

Min.: 1
Mult.: 1