Circular MIL Spec Connectors

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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: $74.79
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

$74.79

$66.48

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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: $54.53
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

$54.53

$46.11

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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: $33.06
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

$33.06

$29.71

Quote

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: $60.05
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

$60.05

$53.16

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: $74.35
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

$74.35

$66.09

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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: $51.43
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

$51.43

$47.77

$47.29

$46.09

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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: $51.39
1,184In 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

1,184In Stock

1,000Expected 06/04/2026

$51.39

$43.33

$40.73

$34.09

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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: $78.08
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

$78.08

$72.93

$62.05

$60.79

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: $84.55
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

$84.55

$77.77

$66.10

$64.20

View

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: $29.08
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

$29.08

$24.72

$23.60

$22.84

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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: $46.38
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

$46.38

$41.22

$39.82

$38.61

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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: $60.19
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

$60.19

$57.21

$51.29

$48.69

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: $54.99
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

$54.99

$50.36

$49.85

$49.35

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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: $60.89
70In Stock

Mfr. Part No.
M85049/1815N04

Mouser Part No
523-85049/1815N04

Amphenol PCD

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

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Datasheet

70In Stock

$60.89

$55.56

$53.54

$53.53

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 15

M85049/1815N05
Amphenol PCD
1: $64.84
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

$64.84

$59.47

$48.94

$47.31

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: $76.89
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

$76.89

$70.30

$59.74

$54.03

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: $72.63
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

$72.63

$66.29

$60.79

$54.24

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: $69.54
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

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Datasheet

37In Stock

50Expected 11/03/2026

$69.54

$65.97

$58.02

$54.92

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: $67.07
66In Stock

Mfr. Part No.
M85049/1821N05

Mouser Part No
523-85049/1821N05

Amphenol PCD

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

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Datasheet

66In Stock

$67.07

$59.64

$55.22

$53.21

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 21

M85049/1821N07
Amphenol PCD
1: $62.85
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

$62.85

$62.21

$58.52

$56.82

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: $84.96
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

$84.96

$77.08

$68.69

$62.52

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 23

M85049/1823N05
Amphenol PCD
1: $59.83
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

$59.83

$59.38

$56.06

$47.84

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

M85049/1823N09
Amphenol PCD
1: $93.31
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

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Datasheet

27In Stock

$93.31

$86.29

$68.25

$63.88

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 25

M85049/1825N04
Amphenol PCD
1: $77.34
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

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Datasheet

42In Stock

$77.34

$68.82

$62.65

$59.28

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 25

M85049/1825N05
Amphenol PCD
1: $78.22
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

$78.22

$67.58

$62.25

$60.19

View

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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