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 BACKSHELL NON ENV EMI/RFI ST NIC SZ 15

M85049/1915N04
Amphenol PCD
1: 45,28 €
24In Stock

Mfr. Part No.
M85049/1915N04

Mouser Part No
523-85049/1915N04

Amphenol PCD

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

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Datasheet

24In Stock

45,28 €

41,19 €

41,18 €

39,22 €

37,35 €

Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

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

M85049/1917N03
Amphenol PCD
1: 52,50 €
24In Stock
25Expected 11/05/2026

Mfr. Part No.
M85049/1917N03

Mouser Part No
523-85049/1917N03

Amphenol PCD

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

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Datasheet

24In Stock

25Expected 11/05/2026

52,50 €

47,58 €

44,96 €

44,63 €

Quote

Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

M85049/1917N06
Amphenol PCD
1: 45,83 €
13In Stock
25Expected 09/03/2026

Mfr. Part No.
M85049/1917N06

Mouser Part No
523-85049/1917N06

Amphenol PCD

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

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Datasheet

13In Stock

25Expected 09/03/2026

45,83 €

41,03 €

Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

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

M85049/1917N06A
Amphenol PCD
1: 58,27 €
14In Stock

Mfr. Part No.
M85049/1917N06A

Mouser Part No
523-85049/1917N06A

Amphenol PCD

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

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Datasheet

14In Stock

58,27 €

53,63 €

53,62 €

53,18 €

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Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

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

M85049/1919N04
Amphenol PCD
1: 53,26 €
29In Stock

Mfr. Part No.
M85049/1919N04

Mouser Part No
523-85049/1919N04

Amphenol PCD

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

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Datasheet

29In Stock

53,26 €

45,27 €

42,43 €

40,41 €

38,55 €

Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

M85049/1919N06
Amphenol PCD
1: 55,28 €
25In Stock

Mfr. Part No.
M85049/1919N06

Mouser Part No
523-85049/1919N06

Amphenol PCD

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

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Datasheet

25In Stock

55,28 €

51,22 €

43,65 €

42,37 €

40,11 €

Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

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

M85049/1921N04
Amphenol PCD
1: 55,03 €
15In Stock
25Expected 09/03/2026

Mfr. Part No.
M85049/1921N04

Mouser Part No
523-85049/1921N04

Amphenol PCD

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

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Datasheet

15In Stock

25Expected 09/03/2026

55,03 €

54,03 €

49,84 €

View

Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

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

M85049/1921N05
Amphenol PCD
1: 64,18 €
15In Stock

Mfr. Part No.
M85049/1921N05

Mouser Part No
523-85049/1921N05

Amphenol PCD

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

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Datasheet

15In Stock

64,18 €

49,38 €

47,47 €

46,55 €

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Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

M85049/1921N06
Amphenol PCD
1: 55,06 €
10In Stock
25Expected 30/04/2026

Mfr. Part No.
M85049/1921N06

Mouser Part No
523-85049/1921N06

Amphenol PCD

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

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Datasheet

10In Stock

25Expected 30/04/2026

55,06 €

53,44 €

52,85 €

52,05 €

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Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

M85049/1921N07
Amphenol PCD
1: 58,07 €
21In Stock

Mfr. Part No.
M85049/1921N07

Mouser Part No
523-85049/1921N07

Amphenol PCD

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

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Datasheet

21In Stock

58,07 €

49,36 €

46,27 €

44,06 €

42,37 €

Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

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

M85049/1923N03
Amphenol PCD
1: 55,82 €
17In Stock

Mfr. Part No.
M85049/1923N03

Mouser Part No
523-85049/1923N03

Amphenol PCD

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

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Datasheet

17In Stock

55,82 €

50,87 €

43,23 €

42,31 €

View

Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

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

M85049/1923N05
Amphenol PCD
1: 65,48 €
16In Stock

Mfr. Part No.
M85049/1923N05

Mouser Part No
523-85049/1923N05

Amphenol PCD

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

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Datasheet

16In Stock

65,48 €

52,55 €

45,72 €

Quote

Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

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

M85049/1923N06
Amphenol PCD
1: 61,58 €
8In Stock
50On Order

Mfr. Part No.
M85049/1923N06

Mouser Part No
523-85049/1923N06

Amphenol PCD

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

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Datasheet

8In Stock

50On Order

61,58 €

58,08 €

57,64 €

54,21 €

View

Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

M85049/1925N04
Amphenol PCD
1: 61,77 €
24In Stock
25Expected 10/03/2026

Mfr. Part No.
M85049/1925N04

Mouser Part No
523-85049/1925N04

Amphenol PCD

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

Learn More

Datasheet

24In Stock

25Expected 10/03/2026

61,77 €

56,59 €

56,58 €

53,90 €

View

Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

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

M85049/1925N06
Amphenol PCD
1: 64,25 €
15In Stock

Mfr. Part No.
M85049/1925N06

Mouser Part No
523-85049/1925N06

Amphenol PCD

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

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Datasheet

15In Stock

64,25 €

59,77 €

59,76 €

58,96 €

View

Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

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

M85049/1925N09
Amphenol PCD
1: 68,19 €
17In Stock

Mfr. Part No.
M85049/1925N09

Mouser Part No
523-85049/1925N09

Amphenol PCD

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

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Datasheet

17In Stock

68,19 €

62,51 €

62,50 €

61,87 €

View

Min.: 1
Mult.: 1

Non-Environmental EMI/RFI Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Strain Reliefs & Adapters BACKSHELL CRIMP RING ADAPTER ST NIC SZ 11

M85049/20-11N
Amphenol PCD
1: 17,41 €
4In Stock

Mfr. Part No.
M85049/20-11N

Mouser Part No
523-85049/20-11N

Amphenol PCD

Circular MIL Spec Strain Reliefs & Adapters BACKSHELL CRIMP RING ADAPTER ST NIC SZ 11

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Datasheet

4In Stock

17,41 €

15,92 €

15,23 €

14,82 €

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Min.: 1
Mult.: 1

Adapters

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Strain Reliefs & Adapters BACKSHELL CRIMP RING ADAPTER ST NIC SZ 1

M85049/20-13N
Amphenol PCD
1: 23,95 €
25In Stock

Mfr. Part No.
M85049/20-13N

Mouser Part No
523-85049/20-13N

Amphenol PCD

Circular MIL Spec Strain Reliefs & Adapters BACKSHELL CRIMP RING ADAPTER ST NIC SZ 1

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Datasheet

25In Stock

23,95 €

22,24 €

18,47 €

17,66 €

View

Min.: 1
Mult.: 1

Adapters

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Strain Reliefs & Adapters BACKSHELL CRIMP RING ADAPTER ST NIC SZ 19

M85049/20-19N
Amphenol PCD
1: 18,33 €
23In Stock

Mfr. Part No.
M85049/20-19N

Mouser Part No
523-85049/20-19N

Amphenol PCD

Circular MIL Spec Strain Reliefs & Adapters BACKSHELL CRIMP RING ADAPTER ST NIC SZ 19

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Datasheet

23In Stock

18,33 €

16,78 €

15,83 €

15,51 €

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Min.: 1
Mult.: 1

Adapters

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Strain Reliefs & Adapters BACKSHELL CRIMP RING ADAPTER ST NIC SZ 2

M85049/20-21N
Amphenol PCD
1: 16,89 €
20In Stock

Mfr. Part No.
M85049/20-21N

Mouser Part No
523-85049/20-21N

Amphenol PCD

Circular MIL Spec Strain Reliefs & Adapters BACKSHELL CRIMP RING ADAPTER ST NIC SZ 2

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Datasheet

20In Stock

16,89 €

15,69 €

15,68 €

14,53 €

Min.: 1
Mult.: 1

Adapters

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 11

M85049/2111A02A
Amphenol PCD
1: 35,55 €
11In Stock

Mfr. Part No.
M85049/2111A02A

Mouser Part No
523-85049/2111A02A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 11

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Datasheet

11In Stock

35,55 €

30,91 €

29,58 €

28,62 €

View

Min.: 1
Mult.: 1

Non-Environmental Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 11

M85049/2111N02
Amphenol PCD
1: 39,90 €
3In Stock
40Expected 13/05/2026

Mfr. Part No.
M85049/2111N02

Mouser Part No
523-85049/2111N02

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 11

Learn More

Datasheet

3In Stock

40Expected 13/05/2026

39,90 €

35,89 €

30,56 €

28,80 €

View

Min.: 1
Mult.: 1

Non-Environmental Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 11

M85049/2111N03
Amphenol PCD
1: 38,14 €
19In Stock

Mfr. Part No.
M85049/2111N03

Mouser Part No
523-85049/2111N03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 11

Learn More

Datasheet

19In Stock

38,14 €

27,92 €

27,68 €

26,16 €

View

Min.: 1
Mult.: 1

Non-Environmental Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 11

M85049/2111N03A
Amphenol PCD
1: 41,57 €
1In Stock
25Expected 16/03/2026

Mfr. Part No.
M85049/2111N03A

Mouser Part No
523-85049/2111N03A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 11

Learn More

Datasheet

1In Stock

25Expected 16/03/2026

41,57 €

36,77 €

35,17 €

34,40 €

View

Min.: 1
Mult.: 1

Non-Environmental Backshells

MIL-DTL-38999 III, IV

Straight

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 13

M85049/2113A04
Amphenol PCD
1: 38,04 €
2In Stock
25Expected 27/04/2026

Mfr. Part No.
M85049/2113A04

Mouser Part No
523-85049/2113A04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 13

Learn More

Datasheet

2In Stock

25Expected 27/04/2026

38,04 €

33,58 €

33,57 €

31,21 €

View

Min.: 1
Mult.: 1

Non-Environmental Backshells

MIL-DTL-38999 III, IV

Straight

Backshell Clamps

Types of Circular MIL Spec Connectors

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