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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 BACKSHELL NON ENV ST BLACK SZ 11

M85049/2111A02A
Amphenol PCD
1: $52.01
25Expected 28/9/2026

Mfr. Part No.
M85049/2111A02A

Mouser Part No
523-85049/2111A02A

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 11

Datasheet

25Expected 28/9/2026

$52.01

$47.86

$47.84

$47.49

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 21

M85049/2121A06
Amphenol PCD
1: $61.61
25Expected 13/10/2026

Mfr. Part No.
M85049/2121A06

Mouser Part No
523-85049/2121A06

Circular MIL Spec Backshells BACKSHELL NON ENV ST BLACK SZ 21

Datasheet

25Expected 13/10/2026

$61.61

$56.70

$56.68

$56.26

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 23

M85049/2123N09A
Amphenol PCD
1: $74.53
23Expected 2/12/2026

Mfr. Part No.
M85049/2123N09A

Mouser Part No
523-85049/2123N09A

Circular MIL Spec Backshells BACKSHELL NON ENV ST NIC SZ 23

Datasheet

23Expected 2/12/2026

$74.53

$67.71

$63.21

$61.50

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 31 Backshell Grommet Nut

M85049/31-10N
Amphenol PCD
1: $18.65
23On Order

Mfr. Part No.
M85049/31-10N

Mouser Part No
523-85049/31-10N

Circular MIL Spec Backshells 31 Backshell Grommet Nut

Datasheet

23On Order

$18.65

$15.86

$14.85

$14.16

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 16

M85049/31-16N
Amphenol PCD
1: $20.40
9Expected 27/10/2026

Mfr. Part No.
M85049/31-16N

Mouser Part No
523-85049/31-16N

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 16

Datasheet

9Expected 27/10/2026

$20.40

$18.09

$14.46

$13.98

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 20

M85049/31-20N
Amphenol PCD
1: $20.41
50Expected 25/11/2026

Mfr. Part No.
M85049/31-20N

Mouser Part No
523-85049/31-20N

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 20

Datasheet

50Expected 25/11/2026

$20.41

$17.35

$16.25

$15.48

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 22

M85049/31-22N
Amphenol PCD
1: $24.66
25Expected 26/11/2026

Mfr. Part No.
M85049/31-22N

Mouser Part No
523-85049/31-22N

Circular MIL Spec Backshells BACKSHELL GRMT NUT ST NIC SZ 22

Datasheet

25Expected 26/11/2026

$24.66

$23.83

$23.81

$16.74

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NICKEL

M85049/6-7N
Amphenol PCD
1: $83.50
25Expected 26/11/2026

Mfr. Part No.
M85049/6-7N

Mouser Part No
523-85049/6-7N

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NICKEL

Datasheet

25Expected 26/11/2026

$83.50

$68.19

$61.17

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC SZ 09

M85049/6-9N
Amphenol PCD
1: $69.74
15Expected 25/11/2026

Mfr. Part No.
M85049/6-9N

Mouser Part No
523-85049/6-9N

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC SZ 09

Datasheet

15Expected 25/11/2026

$69.74

$63.39

$63.31

$60.74

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC SZ 17

M85049/78-17N03
Amphenol PCD
1: $100.84
19Expected 11/9/2026

Mfr. Part No.
M85049/78-17N03

Mouser Part No
523-85049/78-17N03

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI 45 DEG NIC SZ 17

Datasheet

19Expected 11/9/2026

$100.84

$92.85

$84.36

Min.: 1
Mult.: 1

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

M85049/79-15N02
Amphenol PCD
1: $97.02
15Expected 8/10/2026

Mfr. Part No.
M85049/79-15N02

Mouser Part No
523-85049/79-15N02

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

Datasheet

15Expected 8/10/2026

$97.02

$92.28

$92.26

$83.14

Quote

Min.: 1
Mult.: 1

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

M85049/79-15N03
Amphenol PCD
1: $109.37
10Expected 29/9/2026

Mfr. Part No.
M85049/79-15N03

Mouser Part No
523-85049/79-15N03

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

Datasheet

10Expected 29/9/2026

$109.37

$97.23

$95.01

$90.43

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI R/A NIC

M85049/8-10N
Amphenol PCD
1: $76.19
19Expected 3/11/2026

Mfr. Part No.
M85049/8-10N

Mouser Part No
523-85049/8-10N

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI R/A NIC

Datasheet

19Expected 3/11/2026

$76.19

$65.40

$61.88

$58.93

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI R/A NIC

M85049/8-6N
Amphenol PCD
1: $74.81
11Expected 27/11/2026

Mfr. Part No.
M85049/8-6N

Mouser Part No
523-85049/8-6N

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI R/A NIC

Datasheet

11Expected 27/11/2026

$74.81

$61.23

$61.21

$60.49

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 8 Backshell Env-EMI/RFI

M85049/8-7W
Amphenol PCD
1: $67.84
23Expected 28/10/2026

Mfr. Part No.
M85049/8-7W

Mouser Part No
523-85049/8-7W

Circular MIL Spec Backshells 8 Backshell Env-EMI/RFI

Datasheet

23Expected 28/10/2026

$67.84

$62.29

$62.27

$62.25

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 82 Backshell Band Lock

M85049/82-12N02
Amphenol PCD
1: $55.79
5Expected 4/11/2026

Mfr. Part No.
M85049/82-12N02

Mouser Part No
523-85049/82-12N02

Circular MIL Spec Backshells 82 Backshell Band Lock

Datasheet

5Expected 4/11/2026

$55.79

$51.34

$51.33

$51.10

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR ST NIC SZ 18

M85049/82-18N02
Amphenol PCD
1: $67.71
16Expected 9/12/2026

Mfr. Part No.
M85049/82-18N02

Mouser Part No
523-85049/82-18N02

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR ST NIC SZ 18

Datasheet

16Expected 9/12/2026

$67.71

$57.56

$56.88

$53.43

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 84 Backshell Band Lock

M85049/84-10N03
Amphenol PCD
1: $90.94
25Expected 29/9/2026

Mfr. Part No.
M85049/84-10N03

Mouser Part No
523-85049/84-10N03

Circular MIL Spec Backshells 84 Backshell Band Lock

Datasheet

25Expected 29/9/2026

$90.94

$78.54

$74.05

Quote

Min.: 1
Mult.: 1

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

M85049/84-12N02
Amphenol PCD
1: $96.15
25Expected 5/11/2026

Mfr. Part No.
M85049/84-12N02

Mouser Part No
523-85049/84-12N02

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

Datasheet

25Expected 5/11/2026

$96.15

$83.38

$81.49

$77.75

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL BND LCK 45 DEG ADPT NIC SZ 24

M85049/86-24N02
Amphenol PCD
1: $90.48
13Expected 23/10/2026

Mfr. Part No.
M85049/86-24N02

Mouser Part No
523-85049/86-24N02

Circular MIL Spec Backshells BACKSHELL BND LCK 45 DEG ADPT NIC SZ 24

Datasheet

13Expected 23/10/2026

$90.48

$85.58

$85.57

$84.93

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 89 Backshell Band Lock

M85049/89-23N03
Amphenol PCD
1: $95.05
19Expected 24/11/2026

Mfr. Part No.
M85049/89-23N03

Mouser Part No
523-85049/89-23N03

Circular MIL Spec Backshells 89 Backshell Band Lock

Datasheet

19Expected 24/11/2026

$95.05

$86.55

$82.59

$81.16

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR R/A NIC SZ 13

M85049/90-13N02
Amphenol PCD
1: $96.41
13Expected 28/10/2026

Mfr. Part No.
M85049/90-13N02

Mouser Part No
523-85049/90-13N02

Circular MIL Spec Backshells BACKSHELL BND LOCK ADPTR R/A NIC SZ 13

Datasheet

13Expected 28/10/2026

$96.41

$83.08

$77.87

$74.16

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 118 Backshell Strain Relief Clamp

M85049/118S24W
Amphenol PCD
1: $90.96
24Expected 6/11/2026

Mfr. Part No.
M85049/118S24W

Mouser Part No
523-85049118S24W

Circular MIL Spec Backshells 118 Backshell Strain Relief Clamp

24Expected 6/11/2026

$90.96

$83.01

$81.15

$79.76

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells M85049/95-14A

A850499514A
Amphenol PCD
1: $25.64
50Expected 5/11/2026

Mfr. Part No.
A850499514A

Mouser Part No
523-A850499514A

Circular MIL Spec Backshells M85049/95-14A

Datasheet

50Expected 5/11/2026

$25.64

$21.98

$18.51

$17.52

$16.54

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 95 Backshell Mounting flange

A850499520A
Amphenol PCD
1: $28.53
25Expected 15/10/2026

Mfr. Part No.
A850499520A

Mouser Part No
523-A850499520A

Circular MIL Spec Backshells 95 Backshell Mounting flange

Datasheet

25Expected 15/10/2026

$28.53

$27.54

$26.41

$20.60

$18.41

Min.: 1
Mult.: 1