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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 Straight Shell size 25 Black Zinc Nickel w/ Exposed Nickel Entry 2

M85049/88-25ZP02
Amphenol PCD
1: $126.94
53In Stock

Mfr. Part #
M85049/88-25ZP02

Mouser Part #
523-M85049/88-25ZP02

Circular MIL Spec Backshells Straight Shell size 25 Black Zinc Nickel w/ Exposed Nickel Entry 2

Datasheet

53In Stock

$126.94

$110.51

$94.38

$91.71

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 18 Black Zinc Nickel w/ Exposed Nickel Entry 2

M85049/85-18ZP02
Amphenol PCD
1: $103.16
31In Stock

Mfr. Part #
M85049/85-18ZP02

Mouser Part #
523-M85049/85-18ZP02

Circular MIL Spec Backshells Straight Shell size 18 Black Zinc Nickel w/ Exposed Nickel Entry 2

Datasheet

31In Stock

$103.16

$78.25

$76.69

$75.64

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 21 Black Zinc Nickel w/ Exposed Nickel Entry 2

M85049/88-21ZP02
Amphenol PCD
1: $110.43
29In Stock

Mfr. Part #
M85049/88-21ZP02

Mouser Part #
523-M85049/88-21ZP02

Circular MIL Spec Backshells Straight Shell size 21 Black Zinc Nickel w/ Exposed Nickel Entry 2

Datasheet

29In Stock

$110.43

$95.63

$75.84

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 10 Black Zinc Nickel w/ Exposed Nickel Entry Size 3

M85049/82-10ZP03
Amphenol PCD
1: $83.12
34In Stock

Mfr. Part #
M85049/82-10ZP03

Mouser Part #
523-M85049/82-10ZP03

Circular MIL Spec Backshells Straight Shell size 10 Black Zinc Nickel w/ Exposed Nickel Entry Size 3

Datasheet

34In Stock

$83.12

$71.35

$65.95

$64.20

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 12 Black Zinc Nickel w/ Exposed Nickel Entry Size 1

M85049/85-12ZP01
Amphenol PCD
1: $90.33
40In Stock

Mfr. Part #
M85049/85-12ZP01

Mouser Part #
523-M85049/85-12ZP01

Circular MIL Spec Backshells Straight Shell size 12 Black Zinc Nickel w/ Exposed Nickel Entry Size 1

Datasheet

40In Stock

$90.33

$90.27

$68.46

$68.44

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 16 Black Zinc Nickel w/ Exposed Nickel Entry 2

M85049/85-16ZP02
Amphenol PCD
1: $87.13
38In Stock

Mfr. Part #
M85049/85-16ZP02

Mouser Part #
523-M85049/85-16ZP02

Circular MIL Spec Backshells Straight Shell size 16 Black Zinc Nickel w/ Exposed Nickel Entry 2

Datasheet

38In Stock

$87.13

$75.56

$69.32

$68.82

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 12 Black Zinc Nickel w/ Exposed Nickel Entry Size 2

M85049/82-12ZP02
Amphenol PCD
1: $96.34
15In Stock

Mfr. Part #
M85049/82-12ZP02

Mouser Part #
523-M85049/82-12ZP02

Circular MIL Spec Backshells Straight Shell size 12 Black Zinc Nickel w/ Exposed Nickel Entry Size 2

Datasheet

15In Stock

$96.34

$71.63

$69.65

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 14 Black Zinc Nickel w/ Exposed Nickel Entry 2

M85049/85-14ZP02
Amphenol PCD
1: $88.30
25In Stock

Mfr. Part #
M85049/85-14ZP02

Mouser Part #
523-M85049/85-14ZP02

Circular MIL Spec Backshells Straight Shell size 14 Black Zinc Nickel w/ Exposed Nickel Entry 2

Datasheet

25In Stock

$88.30

$82.73

$66.47

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 16 Black Zinc Nickel w/ Exposed Nickel Entry 1

M85049/85-16ZP01
Amphenol PCD
1: $99.32
15In Stock

Mfr. Part #
M85049/85-16ZP01

Mouser Part #
523-M85049/85-16ZP01

Circular MIL Spec Backshells Straight Shell size 16 Black Zinc Nickel w/ Exposed Nickel Entry 1

Datasheet

15In Stock

$99.32

$68.82

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 16 Black Zinc Nickel w/ Exposed Nickel Entry 2

M85049/82-16ZP02
Amphenol PCD
1: $103.18
11In Stock

Mfr. Part #
M85049/82-16ZP02

Mouser Part #
523-M85049/82-16ZP02

Circular MIL Spec Backshells Straight Shell size 16 Black Zinc Nickel w/ Exposed Nickel Entry 2

Datasheet

11In Stock

$103.18

$103.12

$76.65

$75.53

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 24 Black Zinc Nickel w/ Exposed Nickel Entry 1

M85049/85-24ZP01
Amphenol PCD
1: $124.98
5In Stock

Mfr. Part #
M85049/85-24ZP01

Mouser Part #
523-M85049/85-24ZP01

Circular MIL Spec Backshells Straight Shell size 24 Black Zinc Nickel w/ Exposed Nickel Entry 1

Datasheet

5In Stock

$124.98

$108.29

$92.91

$90.50

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 10 Black Zinc Nickel w/ Exposed Nickel Entry Size 2

M85049/85-10ZP02
Amphenol PCD
1: $88.65
6In Stock

Mfr. Part #
M85049/85-10ZP02

Mouser Part #
523-M85049/85-10ZP02

Circular MIL Spec Backshells Straight Shell size 10 Black Zinc Nickel w/ Exposed Nickel Entry Size 2

Datasheet

6In Stock

$88.65

$78.47

$65.89

$62.80

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 19 Black Zinc Nickel w/ Exposed Nickel Entry 2

M85049/88-19ZP02
Amphenol PCD
1: $106.70
16In Stock

Mfr. Part #
M85049/88-19ZP02

Mouser Part #
523-M85049/88-19ZP02

Circular MIL Spec Backshells Straight Shell size 19 Black Zinc Nickel w/ Exposed Nickel Entry 2

Datasheet

16In Stock

$106.70

$73.50

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 12 Black Zinc Nickel w/ Exposed Nickel Entry 2

M85049/85-12ZP02
Amphenol PCD
1: $92.09
15In Stock

Mfr. Part #
M85049/85-12ZP02

Mouser Part #
523-M85049/85-12ZP02

Circular MIL Spec Backshells Straight Shell size 12 Black Zinc Nickel w/ Exposed Nickel Entry 2

Datasheet

15In Stock

$92.09

$64.21

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 24 Black Zinc Nickel w/ Exposed Nickel Entry 2

M85049/85-24ZP02
Amphenol PCD
1: $124.98
4In Stock

Mfr. Part #
M85049/85-24ZP02

Mouser Part #
523-M85049/85-24ZP02

Circular MIL Spec Backshells Straight Shell size 24 Black Zinc Nickel w/ Exposed Nickel Entry 2

Datasheet

4In Stock

$124.98

$108.29

$84.92

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 12 Black Zinc Nickel w/ Exposed Nickel Entry Size 3

M85049/82-12ZP03
Amphenol PCD
1: $96.34
9In Stock

Mfr. Part #
M85049/82-12ZP03

Mouser Part #
523-M85049/82-12ZP03

Circular MIL Spec Backshells Straight Shell size 12 Black Zinc Nickel w/ Exposed Nickel Entry Size 3

Datasheet

9In Stock

$96.34

$83.87

$66.93

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 8 Black Zinc Nickel w/ Exposed Nickel Entry Size 2

M85049/85-08ZP02
Amphenol PCD
1: $85.36
8In Stock
25Expected 2026-07-28

Mfr. Part #
M85049/85-08ZP02

Mouser Part #
523-M85049/85-08ZP02

Circular MIL Spec Backshells Straight Shell size 8 Black Zinc Nickel w/ Exposed Nickel Entry Size 2

Datasheet

8In Stock

25Expected 2026-07-28

$85.36

$75.05

$59.92

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 90 Degrees Shell size 10 Black Zinc Nickel w/ Exposed Nickel Entry 3

M85049/87-10ZP03
Amphenol PCD
1: $122.62
23In Stock

Mfr. Part #
M85049/87-10ZP03

Mouser Part #
523-M85049/87-10ZP03

Circular MIL Spec Backshells 90 Degrees Shell size 10 Black Zinc Nickel w/ Exposed Nickel Entry 3

Datasheet

23In Stock

$122.62

$108.99

$106.53

$103.10

View

Min.: 1
Mult.: 1

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

M85049/10-31N
Amphenol PCD
1: $132.41
50In Stock

Mfr. Part #
M85049/10-31N

Mouser Part #
523-85049/10-31N

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

Datasheet

50In Stock

$132.41

$131.34

$107.41

$95.69

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR R/A NIC SZ 12

M85049/84-12N03
Amphenol PCD
1: $101.81
55In Stock

Mfr. Part #
M85049/84-12N03

Mouser Part #
523-85049/84-12N03

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR R/A NIC SZ 12

Datasheet

55In Stock

$101.81

$87.98

$78.44

$77.03

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 8 Black Zinc Nickel w/ Exposed Nickel Entry Size 3

M85049/82-08ZP03
Amphenol PCD
1: $78.87
28In Stock

Mfr. Part #
M85049/82-08ZP03

Mouser Part #
523-M85049/82-08ZP03

Circular MIL Spec Backshells Straight Shell size 8 Black Zinc Nickel w/ Exposed Nickel Entry Size 3

Datasheet

28In Stock

$78.87

$68.39

$62.99

$62.83

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 18 Black Zinc Nickel w/ Exposed Nickel Entry 2

M85049/82-18ZP02
Amphenol PCD
1: $93.61
15In Stock

Mfr. Part #
M85049/82-18ZP02

Mouser Part #
523-M85049/82-18ZP02

Circular MIL Spec Backshells Straight Shell size 18 Black Zinc Nickel w/ Exposed Nickel Entry 2

Datasheet

15In Stock

$93.61

$81.19

$79.34

$76.58

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 18 Black Zinc Nickel w/ Exposed Nickel Entry 3

M85049/82-18ZP03
Amphenol PCD
1: $104.79
32In Stock

Mfr. Part #
M85049/82-18ZP03

Mouser Part #
523-M85049/82-18ZP03

Circular MIL Spec Backshells Straight Shell size 18 Black Zinc Nickel w/ Exposed Nickel Entry 3

Datasheet

32In Stock

$104.79

$104.59

$73.67

$73.50

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 22 Black Zinc Nickel w/ Exposed Nickel Entry 3

M85049/82-22ZP03
Amphenol PCD
1: $116.24
18In Stock

Mfr. Part #
M85049/82-22ZP03

Mouser Part #
523-M85049/82-22ZP03

Circular MIL Spec Backshells Straight Shell size 22 Black Zinc Nickel w/ Exposed Nickel Entry 3

Datasheet

18In Stock

$116.24

$116.06

$80.91

Min.: 1
Mult.: 1

Circular MIL Spec Backshells Straight Shell size 23 Black Zinc Nickel w/ Exposed Nickel Entry 3

M85049/88-23ZP03
Amphenol PCD
1: $103.87
16In Stock

Mfr. Part #
M85049/88-23ZP03

Mouser Part #
523-M85049/88-23ZP03

Circular MIL Spec Backshells Straight Shell size 23 Black Zinc Nickel w/ Exposed Nickel Entry 3

Datasheet

16In Stock

$103.87

$90.07

$88.03

$85.44

Quote

Min.: 1
Mult.: 1