Circular MIL Spec Backshells – Mouser United Kingdom

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QPL Composite Plated EMI/RFI Braided Backshells

Amphenol PCD QPL Composite Plated EMI/RFI Braided Backshells offer effective shielding due to the 360° contact of the braid and are suitable for weight-sensitive applications. Composite backshells are sought after for harsh environments because metal backshells are susceptible to corrosion. These backshells feature a pre-shielded strain relief, EMI/RFI shielding, and AS85049 qualification. Amphenol PCD QPL Composite Plated EMI/RFI Braided Backshells mate with MIL-DTL-38999 Series III connectors and are ideal for avionics, communications, military aerospace, and naval applications.

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Part #

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; STR; Composite

M85049/103-09
Amphenol PCD
1: £58.26
37In Stock

Mfr. Part No.
M85049/103-09

Mouser Part No
523-M85049/103-09

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; STR; Composite

Learn More

Datasheet

37In Stock

£58.26

£54.87

£46.63

£46.12

View

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

EMI/RFI Backshells

Straight

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; STR; Composite

M85049/103-11
Amphenol PCD
1: £58.57
26In Stock

Mfr. Part No.
M85049/103-11

Mouser Part No
523-M85049/103-11

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; STR; Composite

Learn More

Datasheet

26In Stock

£58.57

£53.81

£47.88

£45.73

View

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

EMI/RFI Backshells

Straight

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; STR; Composite

M85049/103-17
Amphenol PCD
1: £65.40
25In Stock

Mfr. Part No.
M85049/103-17

Mouser Part No
523-M85049/103-17

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; STR; Composite

Learn More

Datasheet

25In Stock

£65.40

£62.14

£59.89

£53.14

View

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

EMI/RFI Backshells

Straight

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; STR; Composite

M85049/103-19
Amphenol PCD
1: £65.20
25In Stock

Mfr. Part No.
M85049/103-19

Mouser Part No
523-M85049/103-19

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; STR; Composite

Learn More

Datasheet

25In Stock

£65.20

£59.46

£57.17

£55.26

£52.21

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

EMI/RFI Backshells

Straight

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 45 ; Composite

M85049/104-11
Amphenol PCD
1: £71.91
35In Stock

Mfr. Part No.
M85049/104-11

Mouser Part No
523-M85049/104-11

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 45 ; Composite

Learn More

Datasheet

35In Stock

£71.91

£65.57

£63.05

£60.94

£57.58

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

EMI/RFI Backshells

45 Deg

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; STR; Composite

M85049/103-13
Amphenol PCD
1: £63.01
10In Stock
50Expected 23/03/2026

Mfr. Part No.
M85049/103-13

Mouser Part No
523-M85049/103-13

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; STR; Composite

Learn More

Datasheet

10In Stock

50Expected 23/03/2026

£63.01

£58.96

£52.24

£49.79

View

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

EMI/RFI Backshells

Straight

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; STR; Composite

M85049/103-15
Amphenol PCD
1: £63.01
11In Stock
25Expected 27/04/2026

Mfr. Part No.
M85049/103-15

Mouser Part No
523-M85049/103-15

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; STR; Composite

Learn More

Datasheet

11In Stock

25Expected 27/04/2026

£63.01

£58.96

£52.24

£49.78

View

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

EMI/RFI Backshells

Straight

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 90 ; Composite

M85049/105-09
Amphenol PCD
1: £82.73
13In Stock

Mfr. Part No.
M85049/105-09

Mouser Part No
523-M85049/105-09

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 90 ; Composite

Learn More

Datasheet

13In Stock

£82.73

£75.92

£73.01

£70.56

£66.67

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

EMI/RFI Backshells

90 Deg

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 90 ; Composite

M85049/105-11
Amphenol PCD
1: £82.74
3In Stock
50On Order

Mfr. Part No.
M85049/105-11

Mouser Part No
523-M85049/105-11

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 90 ; Composite

Learn More

Datasheet

3In Stock

50On Order

£82.74

£75.94

£73.02

£70.58

£66.69

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

EMI/RFI Backshells

90 Deg

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 45 ; Composite

M85049/104-13
Amphenol PCD
1: £71.91
24Expected 16/03/2026

Mfr. Part No.
M85049/104-13

Mouser Part No
523-M85049/104-13

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 45 ; Composite

Learn More

Datasheet

24Expected 16/03/2026

£71.91

£65.57

£63.05

£60.94

£57.58

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

EMI/RFI Backshells

45 Deg

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 90 ; Composite

M85049/105-13
Amphenol PCD
1: £86.83
24Expected 16/03/2026

Mfr. Part No.
M85049/105-13

Mouser Part No
523-M85049/105-13

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 90 ; Composite

Learn More

Datasheet

24Expected 16/03/2026

£86.83

£79.69

£76.62

£74.07

£69.97

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

EMI/RFI Backshells

90 Deg

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 90 ; Composite

M85049/105-19
Amphenol PCD
1: £90.50
24Expected 16/03/2026

Mfr. Part No.
M85049/105-19

Mouser Part No
523-M85049/105-19

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 90 ; Composite

Learn More

Datasheet

24Expected 16/03/2026

£90.50

£83.06

£79.86

£77.20

£72.93

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

EMI/RFI Backshells

90 Deg

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 45 ; Composite

M85049/104-09
Amphenol PCD
25: £61.62
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
M85049/104-09

Mouser Part No
523-M85049/104-09

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 45 ; Composite

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£61.62

£59.56

£56.27

Min.: 25
Mult.: 25

MIL-DTL-38999 III, IV

EMI/RFI Backshells

Straight

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 45 ; Composite

M85049/104-15
Amphenol PCD
25: £64.70
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
M85049/104-15

Mouser Part No
523-M85049/104-15

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 45 ; Composite

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£64.70

£62.54

£59.08

Min.: 25
Mult.: 25

MIL-DTL-38999 III, IV

EMI/RFI Backshells

45 Deg

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 45 ; Composite

M85049/104-17
Amphenol PCD
1: £73.79
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
M85049/104-17

Mouser Part No
523-M85049/104-17

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 45 ; Composite

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£73.79

£67.29

£64.70

£62.54

£59.08

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

EMI/RFI Backshells

45 Deg

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 45 ; Composite

M85049/104-19
Amphenol PCD
25: £66.33
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
M85049/104-19

Mouser Part No
523-M85049/104-19

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 45 ; Composite

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£66.33

£64.11

£60.57

Min.: 25
Mult.: 25

MIL-DTL-38999 III, IV

EMI/RFI Backshells

45 Deg

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 90 ; Composite

M85049/105-15
Amphenol PCD
1: £86.81
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
M85049/105-15

Mouser Part No
523-M85049/105-15

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 90 ; Composite

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£86.81

£79.67

£76.61

£74.05

£69.96

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

EMI/RFI Backshells

90 Deg

Nickel

Brass

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 90 ; Composite

M85049/105-17
Amphenol PCD
25: £79.86
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
M85049/105-17

Mouser Part No
523-M85049/105-17

Amphenol PCD

Circular MIL Spec Backshells Backshell; EMI/RFI Strain Relief; 90 ; Composite

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£79.86

£77.20

£72.93

Min.: 25
Mult.: 25

MIL-DTL-38999 III, IV

EMI/RFI Backshells

90 Deg

Nickel

Brass

QPL Composite Plated EMI/RFI Braided Backshells

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