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RoHS

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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 ENV EMI/ RFI R/A OD CAD

M85049/8-19W
Amphenol PCD
1: $101.58
24Expected 13/10/2026

Mfr. Part No.
M85049/8-19W

Mouser Part No
523-85049/8-19W

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI R/A OD CAD

Datasheet

24Expected 13/10/2026

$101.58

$90.30

$88.25

$79.68

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI R/A OD CAD

M85049/8-71W
Amphenol PCD
1: $95.66
25Expected 13/10/2026

Mfr. Part No.
M85049/8-71W

Mouser Part No
523-85049/8-71W

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI R/A OD CAD

Datasheet

25Expected 13/10/2026

$95.66

$93.38

$93.36

$88.60

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR ST CAD SZ 18

M85049/82-18W02
Amphenol PCD
1: $73.86
325On Order

Mfr. Part No.
M85049/82-18W02

Mouser Part No
523-85049/82-18W02

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR ST CAD SZ 18

Datasheet

325On Order

$73.86

$66.48

$63.58

$61.54

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 82 Backshell Band Lock

M85049/82-22W03
Amphenol PCD
1: $83.19
100On Order

Mfr. Part No.
M85049/82-22W03

Mouser Part No
523-85049/82-22W03

Circular MIL Spec Backshells 82 Backshell Band Lock

Datasheet

100On Order

$83.19

$71.41

$67.31

$64.10

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 89 Backshell Band Lock

M85049/89-15W03
Amphenol PCD
1: $96.66
46On Order

Mfr. Part No.
M85049/89-15W03

Mouser Part No
523-85049/89-15W03

Circular MIL Spec Backshells 89 Backshell Band Lock

Datasheet

46On Order

$96.66

$82.16

$77.00

$73.33

$69.84

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

M85049/9-10W
Amphenol PCD
1: $64.15
42On Order

Mfr. Part No.
M85049/9-10W

Mouser Part No
523-85049/9-10W

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

Datasheet

42On Order

$64.15

$53.24

$46.66

$45.42

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

M85049/9-4W
Amphenol PCD
1: $58.64
49Expected 16/9/2026

Mfr. Part No.
M85049/9-4W

Mouser Part No
523-85049/9-4W

Circular MIL Spec Backshells BACKSHELL ENV R/A OD CAD

Datasheet

49Expected 16/9/2026

$58.64

$47.80

$47.38

$45.12

View

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR R/A CAD SZ 21

M85049/90-21W03
Amphenol PCD
1: $121.68
141Expected 1/12/2026

Mfr. Part No.
M85049/90-21W03

Mouser Part No
523-85049/90-21W03

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR R/A CAD SZ 21

Datasheet

141Expected 1/12/2026

$121.68

$103.44

$96.95

$92.33

$87.94

Min.: 1
Mult.: 1

No

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1811Z03
Amphenol PCD
1: $100.23
32Expected 27/11/2026

Mfr. Part No.
M85049/1811Z03

Mouser Part No
523-M850491811Z03

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

Datasheet

32Expected 27/11/2026

$100.23

$86.82

$81.38

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELLS

M85049/1813Z04
Amphenol PCD
1: $101.73
45On Order

Mfr. Part No.
M85049/1813Z04

Mouser Part No
523-M850491813Z04

Circular MIL Spec Backshells BACKSHELLS

Datasheet

45On Order

$101.73

$94.56

$85.49

View

Min.: 1
Mult.: 1

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

M85049/1815Z03
Amphenol PCD
1: $102.29
97On Order

Mfr. Part No.
M85049/1815Z03

Mouser Part No
523-M850491815Z03

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

Datasheet

97On Order

$102.29

$95.05

$92.75

$87.84

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL

M85049/1817Z03
Amphenol PCD
1: $105.90
39Expected 8/9/2026

Mfr. Part No.
M85049/1817Z03

Mouser Part No
523-M850491817Z03

Circular MIL Spec Backshells BACKSHELL

Datasheet

39Expected 8/9/2026

$105.90

$98.26

$94.30

View

Min.: 1
Mult.: 1

Circular MIL Spec Tools, Hardware & Accessories Strain Relief Clamp Shell Size 12

MS27291-2
Amphenol PCD
1: $37.88
167Expected 21/1/2027

Mfr. Part No.
MS27291-2

Mouser Part No
523-MS27291-2

Circular MIL Spec Tools, Hardware & Accessories Strain Relief Clamp Shell Size 12

Datasheet

167Expected 21/1/2027

$37.88

$33.76

$29.36

$26.15

View

Min.: 1
Mult.: 1

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

M85049/10-114N
Amphenol PCD
1: $95.42
5Expected 25/11/2026

Mfr. Part No.
M85049/10-114N

Mouser Part No
523-85049/10-114N

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

Datasheet

5Expected 25/11/2026

$95.42

$90.78

$90.77

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 10

M85049/10-11N
Amphenol PCD
1: $135.55
15Expected 8/10/2026

Mfr. Part No.
M85049/10-11N

Mouser Part No
523-85049/10-11N

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 10

Datasheet

15Expected 8/10/2026

$135.55

$130.78

$130.76

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV ST NIC

M85049/11-116N
Amphenol PCD
1: $80.95
15Expected 27/10/2026

Mfr. Part No.
M85049/11-116N

Mouser Part No
523-85049/11-116N

Circular MIL Spec Backshells BACKSHELL ENV ST NIC

Datasheet

15Expected 27/10/2026

$80.95

$76.01

$75.96

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV ST NIC

M85049/11-25N
Amphenol PCD
1: $97.42
24Expected 4/11/2026

Mfr. Part No.
M85049/11-25N

Mouser Part No
523-85049/11-25N

Circular MIL Spec Backshells BACKSHELL ENV ST NIC

Datasheet

24Expected 4/11/2026

$97.42

$83.90

$78.64

$74.88

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 11

M85049/14-11N
Amphenol PCD
1: $18.55
13Expected 22/10/2026

Mfr. Part No.
M85049/14-11N

Mouser Part No
523-85049/14-11N

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 11

Datasheet

13Expected 22/10/2026

$18.55

$16.46

$13.84

$13.42

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 13

M85049/14-13N
Amphenol PCD
1: $17.83
13Expected 22/10/2026

Mfr. Part No.
M85049/14-13N

Mouser Part No
523-85049/14-13N

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 13

Datasheet

13Expected 22/10/2026

$17.83

$17.00

$14.16

Min.: 1
Mult.: 1

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

M85049/1708N02
Amphenol PCD
1: $72.13
24Expected 27/10/2026

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 27/10/2026

$72.13

$70.28

$70.27

$69.60

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 17 Backshell Env-EMI/RFI

M85049/1712N03
Amphenol PCD
1: $88.24
13Expected 27/11/2026

Mfr. Part No.
M85049/1712N03

Mouser Part No
523-85049/1712N03

Circular MIL Spec Backshells 17 Backshell Env-EMI/RFI

Datasheet

13Expected 27/11/2026

$88.24

$75.00

$70.31

$66.95

$63.76

Min.: 1
Mult.: 1

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

M85049/1716N03
Amphenol PCD
1: $92.04
19Expected 29/10/2026

Mfr. Part No.
M85049/1716N03

Mouser Part No
523-85049/1716N03

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

Datasheet

19Expected 29/10/2026

$92.04

$79.82

$78.01

$77.03

View

Min.: 1
Mult.: 1

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

M85049/1720N04B
Amphenol PCD
1: $99.17
22Expected 29/10/2026

Mfr. Part No.
M85049/1720N04B

Mouser Part No
523-85049/1720N04B

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

Datasheet

22Expected 29/10/2026

$99.17

$88.16

$86.16

$82.77

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 15

M85049/1815N04B
Amphenol PCD
1: $104.18
21Expected 4/12/2026

Mfr. Part No.
M85049/1815N04B

Mouser Part No
523-85049/1815N04B

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 15

Datasheet

21Expected 4/12/2026

$104.18

$73.62

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1821N03
Amphenol PCD
1: $97.50
15In Stock

Mfr. Part No.
M85049/1821N03

Mouser Part No
523-85049/1821N03

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

Datasheet

15In Stock

$97.50

$79.67

$77.21

$74.00

$70.45

Min.: 1
Mult.: 1