Circular MIL Spec Connectors – Mouser United Kingdom

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Backshell Clamps

Amphenol PCD Backshell Clamps help to tidy up the cable after termination and provide strain relief at the termination area. The clamps are offered in environmental and non-environmental options, as well as EMI/RFI. The components are available in black zinc nickel, adding to the existing finishes in olive drab gray cadmium, tin, or nickel with a variety of shell sizes 11 through 48. Amphenol PCD Backshell Clamps meet MIL-DTL-38999, MIL-DTL-26482 Series II, MIL-DTL-83723 Series I and II, MIL-DTL-24308, and MIL-DTL-83513.

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Types of Circular MIL Spec Connectors

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Part #

Circular MIL Spec Backshells

M85049/1712Z04
Amphenol PCD
1: £56.15
14In Stock

Mfr. Part No.
M85049/1712Z04

Mouser Part No
523-M850491712Z04

Amphenol PCD

Circular MIL Spec Backshells

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Datasheet

14In Stock

£56.15

£49.91

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Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 I, II

Straight

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

M85049/1921W06B
Amphenol PCD
1: £41.51
23In Stock

Mfr. Part No.
M85049/1921W06B

Mouser Part No
523-85049/1921W06B

Amphenol PCD

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

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Datasheet

23In Stock

£41.51

Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL ENV 45 DEG OD CAD

M85049/7-43W
Amphenol PCD
1: £27.32
21In Stock

Mfr. Part No.
M85049/7-43W

Mouser Part No
523-85049/7-43W

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV 45 DEG OD CAD

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Datasheet

21In Stock

£27.32

Min.: 1
Mult.: 1

Environmental Backshells

MIL-DTL-5015, MIL-DTL-26482 II

45 Deg

Circular MIL Spec Backshells BACKSHELL EMI/RFI 45 DEG OD CAD SZ 09

M85049/78-19W05
Amphenol PCD
1: £49.64
15In Stock

Mfr. Part No.
M85049/78-19W05

Mouser Part No
523-85049/78-19W05

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL EMI/RFI 45 DEG OD CAD SZ 09

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Datasheet

15In Stock

£49.64

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

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

M85049/1917Z04
Amphenol PCD
1: £55.82
23In Stock

Mfr. Part No.
M85049/1917Z04

Mouser Part No
523-M850491917Z04

Amphenol PCD

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

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Datasheet

23In Stock

£55.82

£49.62

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Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1811N02
Amphenol PCD
1: £38.61
393In Stock

Mfr. Part No.
M85049/1811N02

Mouser Part No
523-85049/1811N02

Amphenol PCD

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

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Datasheet

393In Stock

£38.61

£35.86

£35.50

£34.61

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Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells 88 Backshell Band Lock

M85049/88-9W03
Amphenol PCD
1: £38.59
1,018In Stock
1,000Expected 06/04/2026

Mfr. Part No.
M85049/88-9W03

Mouser Part No
523-85049/88-9W03

Amphenol PCD

Circular MIL Spec Backshells 88 Backshell Band Lock

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Datasheet

1,018In Stock

1,000Expected 06/04/2026

£38.59

£32.53

£30.58

£25.60

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Min.: 1
Mult.: 1

Band Lock Adapters

MIL-DTL-38999 III, IV

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

M85049/10-13N
Amphenol PCD
1: £58.62
40In Stock

Mfr. Part No.
M85049/10-13N

Mouser Part No
523-85049/10-13N

Amphenol PCD

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

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Datasheet

40In Stock

£58.62

£54.75

£46.58

£45.64

View

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-5015, MIL-DTL-26482 II

Straight

Circular MIL Spec Backshells BACKSHELL ENV ST NIC

M85049/11-11N
Amphenol PCD
1: £63.48
21In Stock

Mfr. Part No.
M85049/11-11N

Mouser Part No
523-85049/11-11N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV ST NIC

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Datasheet

21In Stock

£63.48

£58.39

£49.63

£48.99

Min.: 1
Mult.: 1

Environmental Backshells

MIL-DTL-5015, MIL-DTL-26482 II

Straight

Circular MIL Spec Strain Reliefs & Adapters BACKSHELL QCK CLAMP R/A SL NIC SZ 25

M85049/16S25N
Amphenol PCD
1: £21.83
70In Stock

Mfr. Part No.
M85049/16S25N

Mouser Part No
523-85049/16S25N

Amphenol PCD

Circular MIL Spec Strain Reliefs & Adapters BACKSHELL QCK CLAMP R/A SL NIC SZ 25

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Datasheet

70In Stock

£21.83

£18.56

£17.72

£17.15

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Min.: 1
Mult.: 1

Cable Clamps

MIL-DTL-38999 III, IV

Right Angle

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1811N03
Amphenol PCD
1: £34.82
324In Stock

Mfr. Part No.
M85049/1811N03

Mouser Part No
523-85049/1811N03

Amphenol PCD

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

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Datasheet

324In Stock

£34.82

£30.95

£29.90

£28.98

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Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 13

M85049/1813N03
Amphenol PCD
1: £45.19
248In Stock

Mfr. Part No.
M85049/1813N03

Mouser Part No
523-85049/1813N03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 13

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Datasheet

248In Stock

£45.19

£42.95

£38.51

£36.55

View

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 13

M85049/1813N04
Amphenol PCD
1: £41.28
70In Stock
100Expected 11/05/2026

Mfr. Part No.
M85049/1813N04

Mouser Part No
523-85049/1813N04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 13

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Datasheet

70In Stock

100Expected 11/05/2026

£41.28

£37.81

£37.43

£37.05

View

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1815N04
Amphenol PCD
1: £45.72
70In Stock

Mfr. Part No.
M85049/1815N04

Mouser Part No
523-85049/1815N04

Amphenol PCD

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

Learn More

Datasheet

70In Stock

£45.72

£41.71

£40.19

£40.11

Quote

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

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

M85049/1815N05
Amphenol PCD
1: £48.68
154In Stock

Mfr. Part No.
M85049/1815N05

Mouser Part No
523-85049/1815N05

Amphenol PCD

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

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Datasheet

154In Stock

£48.68

£44.65

£36.74

£35.52

View

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 17

M85049/1817N04
Amphenol PCD
1: £57.73
177In Stock

Mfr. Part No.
M85049/1817N04

Mouser Part No
523-85049/1817N04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 17

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Datasheet

177In Stock

£57.73

£52.78

£44.85

£40.57

View

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 17

M85049/1817N05
Amphenol PCD
1: £54.53
47In Stock

Mfr. Part No.
M85049/1817N05

Mouser Part No
523-85049/1817N05

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 17

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Datasheet

47In Stock

£54.53

£49.77

£45.64

£40.73

View

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1819N05
Amphenol PCD
1: £52.21
37In Stock
50Expected 11/03/2026

Mfr. Part No.
M85049/1819N05

Mouser Part No
523-85049/1819N05

Amphenol PCD

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

Learn More

Datasheet

37In Stock

50Expected 11/03/2026

£52.21

£49.53

£43.56

£41.23

View

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1821N05
Amphenol PCD
1: £50.35
66In Stock

Mfr. Part No.
M85049/1821N05

Mouser Part No
523-85049/1821N05

Amphenol PCD

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

Learn More

Datasheet

66In Stock

£50.35

£44.78

£41.46

£39.95

£39.35

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

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

M85049/1821N07
Amphenol PCD
1: £47.19
29In Stock

Mfr. Part No.
M85049/1821N07

Mouser Part No
523-85049/1821N07

Amphenol PCD

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

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Datasheet

29In Stock

£47.19

£46.71

£43.94

£42.66

View

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 23

M85049/1823N04
Amphenol PCD
1: £63.79
32In Stock

Mfr. Part No.
M85049/1823N04

Mouser Part No
523-85049/1823N04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 23

Learn More

Datasheet

32In Stock

£63.79

£57.87

£51.57

£46.94

View

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 23

M85049/1823N05
Amphenol PCD
1: £44.92
39In Stock

Mfr. Part No.
M85049/1823N05

Mouser Part No
523-85049/1823N05

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 23

Learn More

Datasheet

39In Stock

£44.92

£44.58

£42.26

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 23

M85049/1823N09
Amphenol PCD
1: £70.06
27In Stock

Mfr. Part No.
M85049/1823N09

Mouser Part No
523-85049/1823N09

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 23

Learn More

Datasheet

27In Stock

£70.06

£64.79

£51.25

£47.96

£45.76

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 25

M85049/1825N04
Amphenol PCD
1: £58.06
42In Stock

Mfr. Part No.
M85049/1825N04

Mouser Part No
523-85049/1825N04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 25

Learn More

Datasheet

42In Stock

£58.06

£51.67

£47.04

£44.51

£43.58

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 25

M85049/1825N05
Amphenol PCD
1: £58.73
51In Stock
50Expected 15/05/2026

Mfr. Part No.
M85049/1825N05

Mouser Part No
523-85049/1825N05

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST NIC SZ 25

Learn More

Datasheet

51In Stock

50Expected 15/05/2026

£58.73

£50.74

£46.74

£45.19

£44.48

Min.: 1
Mult.: 1

Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Backshell Clamps

Types of Circular MIL Spec Connectors

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