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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 89 Backshell Band Lock

M85049/89-21W03
Amphenol PCD
1: Rp1.368.428
50On Order

Mfr. Part No.
M85049/89-21W03

Mouser Part No
523-85049/89-21W03

Circular MIL Spec Backshells 89 Backshell Band Lock

Datasheet

50On Order

Rp1.368.428

Rp1.163.320

Rp1.090.303

Rp1.038.384

Rp988.849

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

M85049/9-22W
Amphenol PCD
1: Rp1.342.560
25Expected 28/05/2026

Mfr. Part No.
M85049/9-22W

Mouser Part No
523-85049/9-22W

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

Datasheet

25Expected 28/05/2026

Rp1.342.560

Rp1.234.135

Rp1.182.400

Rp1.163.320

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 9 Backshell Env

M85049/9-24W
Amphenol PCD
1: Rp1.582.893
25Expected 25/03/2026

Mfr. Part No.
M85049/9-24W

Mouser Part No
523-85049/9-24W

Circular MIL Spec Backshells 9 Backshell Env

Datasheet

25Expected 25/03/2026

Rp1.582.893

Rp1.547.852

Rp1.547.485

Rp1.504.005

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 90 Backshell Band Lock

M85049/90-21W02
Amphenol PCD
1: Rp1.774.058
50On Order

Mfr. Part No.
M85049/90-21W02

Mouser Part No
523-85049/90-21W02

Circular MIL Spec Backshells 90 Backshell Band Lock

Datasheet

50On Order

Rp1.774.058

Rp1.745.072

Quote

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR R/A CAD SZ 23

M85049/90-23W03
Amphenol PCD
1: Rp1.686.915
50Expected 29/05/2026

Mfr. Part No.
M85049/90-23W03

Mouser Part No
523-85049/90-23W03

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR R/A CAD SZ 23

Datasheet

50Expected 29/05/2026

Rp1.686.915

Rp1.435.208

Rp1.345.312

Rp1.281.101

Rp1.220.009

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 90 Backshell Band Lock

M85049/90-25W02
Amphenol PCD
1: Rp2.115.477
24Expected 29/05/2026

Mfr. Part No.
M85049/90-25W02

Mouser Part No
523-85049/90-25W02

Circular MIL Spec Backshells 90 Backshell Band Lock

Datasheet

24Expected 29/05/2026

Rp2.115.477

Rp1.950.363

Rp1.789.102

Rp1.603.073

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR RA OD CAD SZ 9

M85049/90-9W03
Amphenol PCD
1: Rp1.082.781
225On Order

Mfr. Part No.
M85049/90-9W03

Mouser Part No
523-85049/90-9W03

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR RA OD CAD SZ 9

Datasheet

225On Order

Rp1.082.781

Rp1.029.944

Rp973.806

Rp973.622

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells Backshell; Band Lock; STR; CAD over Composite

M85049/88-15J03
Amphenol PCD
1: Rp2.169.048
22Expected 14/05/2026

Mfr. Part No.
M85049/88-15J03

Mouser Part No
523-M85049/88-15J03

Circular MIL Spec Backshells Backshell; Band Lock; STR; CAD over Composite

Datasheet

22Expected 14/05/2026

Rp2.169.048

Rp1.990.541

View

Min.: 1
Mult.: 1

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

M85049/1815Z04
Amphenol PCD
1: Rp1.421.081
68On Order

Mfr. Part No.
M85049/1815Z04

Mouser Part No
523-M850491815Z04

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

Datasheet

68On Order

Rp1.421.081

Rp1.306.052

Rp1.149.193

Rp1.101.677

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1815Z05
Amphenol PCD
1: Rp1.428.786
48Expected 23/04/2026

Mfr. Part No.
M85049/1815Z05

Mouser Part No
523-M850491815Z05

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

Datasheet

48Expected 23/04/2026

Rp1.428.786

Rp1.232.484

Rp1.155.248

View

Min.: 1
Mult.: 1

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

M85049/10-14N
Amphenol PCD
1: Rp1.409.156
16Expected 05/03/2026

Mfr. Part No.
M85049/10-14N

Mouser Part No
523-85049/10-14N

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

Datasheet

16Expected 05/03/2026

Rp1.409.156

Rp1.252.665

Rp1.204.415

Rp1.164.237

Rp1.100.026

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 10 Backshell Env-EMI/RFI

M85049/10-21N
Amphenol PCD
1: Rp1.686.364
19Expected 11/03/2026

Mfr. Part No.
M85049/10-21N

Mouser Part No
523-85049/10-21N

Circular MIL Spec Backshells 10 Backshell Env-EMI/RFI

Datasheet

19Expected 11/03/2026

Rp1.686.364

Rp1.544.917

Rp1.358.705

Rp1.258.352

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV ST NIC

M85049/11-124N
Amphenol PCD
1: Rp1.256.518
17Expected 16/03/2026

Mfr. Part No.
M85049/11-124N

Mouser Part No
523-85049/11-124N

Circular MIL Spec Backshells BACKSHELL ENV ST NIC

Datasheet

17Expected 16/03/2026

Rp1.256.518

Rp1.156.899

Rp1.058.381

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 08

M85049/1708N02
Amphenol PCD
1: Rp1.080.763
24Expected 15/05/2026

Mfr. Part No.
M85049/1708N02

Mouser Part No
523-85049/1708N02

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 08

Datasheet

24Expected 15/05/2026

Rp1.080.763

Rp905.925

Rp905.742

Rp840.430

View

Min.: 1
Mult.: 1

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

M85049/1716N04
Amphenol PCD
1: Rp1.261.288
22Expected 11/05/2026

Mfr. Part No.
M85049/1716N04

Mouser Part No
523-85049/1716N04

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

Datasheet

22Expected 11/05/2026

Rp1.261.288

Rp1.109.016

Rp1.066.270

Rp1.030.678

Rp973.806

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 09

M85049/1809N01
Amphenol PCD
1: Rp1.048.290
25Expected 04/06/2026

Mfr. Part No.
M85049/1809N01

Mouser Part No
523-85049/1809N01

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 09

Datasheet

25Expected 04/06/2026

Rp1.048.290

Rp909.044

Rp874.003

Rp844.833

View

Min.: 1
Mult.: 1

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

M85049/1821N08
Amphenol PCD
1: Rp1.570.785
18Expected 05/03/2026

Mfr. Part No.
M85049/1821N08

Mouser Part No
523-85049/1821N08

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

Datasheet

18Expected 05/03/2026

Rp1.570.785

Rp1.403.286

Rp1.245.693

Rp1.174.327

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 11

M85049/1911N02
Amphenol PCD
1: Rp972.705
25Expected 17/04/2026

Mfr. Part No.
M85049/1911N02

Mouser Part No
523-85049/1911N02

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 11

Datasheet

25Expected 17/04/2026

Rp972.705

Rp892.166

Rp769.615

Rp762.276

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 19

M85049/1919N03
Amphenol PCD
1: Rp872.169
25Expected 28/05/2026

Mfr. Part No.
M85049/1919N03

Mouser Part No
523-85049/1919N03

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 19

Datasheet

25Expected 28/05/2026

Rp872.169

Rp845.934

Rp845.751

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 21

M85049/1921N08
Amphenol PCD
1: Rp1.271.194
25Expected 06/04/2026

Mfr. Part No.
M85049/1921N08

Mouser Part No
523-85049/1921N08

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 21

Datasheet

25Expected 06/04/2026

Rp1.271.194

Rp1.196.526

Rp1.196.343

Rp1.194.508

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 20 Backshell Crmp Rng

M85049/20-23N
Amphenol PCD
1: Rp403.795
24Expected 12/05/2026

Mfr. Part No.
M85049/20-23N

Mouser Part No
523-85049/20-23N

Circular MIL Spec Backshells 20 Backshell Crmp Rng

Datasheet

24Expected 12/05/2026

Rp403.795

Rp371.873

Rp371.690

Rp367.470

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 13

M85049/2113A03A
Amphenol PCD
1: Rp811.444
25Expected 23/03/2026

Mfr. Part No.
M85049/2113A03A

Mouser Part No
523-85049/2113A03A

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 13

Datasheet

25Expected 23/03/2026

Rp811.444

Rp750.351

Rp637.524

Rp631.286

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 13

M85049/2113N03A
Amphenol PCD
1: Rp811.444
25Expected 05/03/2026

Mfr. Part No.
M85049/2113N03A

Mouser Part No
523-85049/2113N03A

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 13

Datasheet

25Expected 05/03/2026

Rp811.444

Rp727.052

Rp726.869

Rp721.548

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 15

M85049/2115A02
Amphenol PCD
1: Rp785.759
22Expected 13/05/2026

Mfr. Part No.
M85049/2115A02

Mouser Part No
523-85049/2115A02

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 15

Datasheet

22Expected 13/05/2026

Rp785.759

Rp683.022

Rp653.485

Rp632.387

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 15

M85049/2115N05
Amphenol PCD
1: Rp793.465
25On Order

Mfr. Part No.
M85049/2115N05

Mouser Part No
523-85049/2115N05

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 15

Datasheet

25On Order

Rp793.465

Rp728.703

Rp663.208

Rp631.102

View

Min.: 1
Mult.: 1