Circular MIL Spec Backshells

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Single Arm Composite Backshells

SUNBANK Single Arm Composite Backshells are designed to mate with MIL-DTL-38999 I, II, III, and IV connectors and incorporate self-locking coupling. The self-locking feature of these SUNBANK backshells withstands high vibrations. Single Arm Backshells comprise lightweight, aerospace-grade composite materials up to 40% lighter than aluminum. The backshells are available with electroless nickel plating, meeting the requirements of AS85049 and RoHS/REACH compliance. A Ground Lug option allows soldering directly to the body.

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Part #

Circular MIL Spec Backshells Natural Straight Adapter Assembly

09F7S721XB17
Sunbank / Souriau
1: $117.84
3In Stock

Mfr. Part #
09F7S721XB17

Mouser Part #
649-09F7S721XB17

Sunbank / Souriau

Circular MIL Spec Backshells Natural Straight Adapter Assembly

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Datasheet

3In Stock

$117.84

$104.75

$100.71

$97.34

$91.97

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

Band Lock Adapters

Thermoplastic (TP)

Circular MIL Spec Backshells Plated 90 degree Adapter Assembly

09F7R721XN15G
Sunbank / Souriau
1: $286.96
24In Stock

Mfr. Part #
09F7R721XN15G

Mouser Part #
649-09F7R721XN15G

Sunbank / Souriau

Circular MIL Spec Backshells Plated 90 degree Adapter Assembly

Learn More

Datasheet

24In Stock

$286.96

$247.77

$238.90

$237.12

View

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Plated Straight Adapter Assembly

09F7S721XN17G
Sunbank / Souriau
1: $545.30
22In Stock

Mfr. Part #
09F7S721XN17G

Mouser Part #
649-09F7S721XN17G

Sunbank / Souriau

Circular MIL Spec Backshells Plated Straight Adapter Assembly

Learn More

Datasheet

22In Stock

$545.30

$496.01

$478.22

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Plated 90 degree Adapter Assembly

09F7R721XN17G
Sunbank / Souriau
1: $545.98
23In Stock

Mfr. Part #
09F7R721XN17G

Mouser Part #
649-09F7R721XN17G

Sunbank / Souriau

Circular MIL Spec Backshells Plated 90 degree Adapter Assembly

Learn More

Datasheet

23In Stock

$545.98

$496.61

$478.80

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Plated 90 degree Adapter Assembly

09F7R721XN11G
Sunbank / Souriau
1: $540.96
24In Stock

Mfr. Part #
09F7R721XN11G

Mouser Part #
649-09F7R721XN11G

Sunbank / Souriau

Circular MIL Spec Backshells Plated 90 degree Adapter Assembly

Learn More

Datasheet

24In Stock

$540.96

$492.06

$474.42

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Black Straight Adapter Assembly

09F7S721XM13
Sunbank / Souriau
1: $172.15
22In Stock

Mfr. Part #
09F7S721XM13

Mouser Part #
649-09F7S721XM13

Sunbank / Souriau

Circular MIL Spec Backshells Black Straight Adapter Assembly

Learn More

Datasheet

22In Stock

$172.15

$156.99

$150.96

$145.92

$137.85

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

Band Lock Adapters

Thermoplastic (TP)

Circular MIL Spec Backshells Plated Straight Adapter Assembly

09F7S721XN11G
Sunbank / Souriau
1: $545.41
24In Stock

Mfr. Part #
09F7S721XN11G

Mouser Part #
649-09F7S721XN11G

Sunbank / Souriau

Circular MIL Spec Backshells Plated Straight Adapter Assembly

Learn More

Datasheet

24In Stock

$545.41

$496.11

$478.31

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Black 90degree Adapter Assembly

09F7R721XM11
Sunbank / Souriau
1: $118.74
22In Stock
Factory Special Order

Mfr. Part #
09F7R721XM11

Mouser Part #
649-09F7R721XM11

Factory Special Order

Sunbank / Souriau

Circular MIL Spec Backshells Black 90degree Adapter Assembly

Learn More

Datasheet

22In Stock

$118.74

$105.71

View

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

Band Lock Adapters

Thermoplastic (TP)

Circular MIL Spec Backshells Black 90degree Adapter Assembly

09F7R721XM13
Sunbank / Souriau
1: $123.54
22In Stock
Factory Special Order

Mfr. Part #
09F7R721XM13

Mouser Part #
649-09F7R721XM13

Factory Special Order

Sunbank / Souriau

Circular MIL Spec Backshells Black 90degree Adapter Assembly

Learn More

Datasheet

22In Stock

$123.54

$109.89

View

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

Band Lock Adapters

Thermoplastic (TP)

Circular MIL Spec Backshells Black 90degree Adapter Assembly

09F7R721XM23
Sunbank / Souriau
1: $143.45
25In Stock
Factory Special Order

Mfr. Part #
09F7R721XM23

Mouser Part #
649-09F7R721XM23

Factory Special Order

Sunbank / Souriau

Circular MIL Spec Backshells Black 90degree Adapter Assembly

Learn More

Datasheet

25In Stock

$143.45

$130.82

$130.16

View

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

Band Lock Adapters

Thermoplastic (TP)

Circular MIL Spec Backshells Black 90degree Adapter Assembly

09F7R721XM15
Sunbank / Souriau
1: $102.69
22In Stock
Factory Special Order

Mfr. Part #
09F7R721XM15

Mouser Part #
649-09F7R721XM15

Factory Special Order

Sunbank / Souriau

Circular MIL Spec Backshells Black 90degree Adapter Assembly

Learn More

Datasheet

22In Stock

$102.69

$91.71

View

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

Band Lock Adapters

Thermoplastic (TP)

Circular MIL Spec Backshells Black Straight Adapter Assembly

09F7S721XM17
Sunbank / Souriau
1: $202.48
45Expected 2026-09-25

Mfr. Part #
09F7S721XM17

Mouser Part #
649-09F7S721XM17

Sunbank / Souriau

Circular MIL Spec Backshells Black Straight Adapter Assembly

Learn More

Datasheet

45Expected 2026-09-25

$202.48

$185.83

Min.: 1
Mult.: 1

MIL-DTL-38999 III, IV

Band Lock Adapters

Thermoplastic (TP)

Circular MIL Spec Backshells Black 45degree Adapter Assembly

09F7A721XM11
Sunbank / Souriau
50: $137.53
Non-Stocked

Mfr. Part #
09F7A721XM11

Mouser Part #
649-09F7A721XM11

Sunbank / Souriau

Circular MIL Spec Backshells Black 45degree Adapter Assembly

Learn More

Datasheet

Non-Stocked

$137.53

$129.95

Min.: 50
Mult.: 50

MIL-DTL-38999 III, IV

Band Lock Adapters

Thermoplastic (TP)

Circular MIL Spec Backshells Plated 45 degree Adapter Assembly

09F7A721XN11G
Sunbank / Souriau
50: $474.26
Non-Stocked

Mfr. Part #
09F7A721XN11G

Mouser Part #
649-09F7A721XN11G

Sunbank / Souriau

Circular MIL Spec Backshells Plated 45 degree Adapter Assembly

Learn More

Datasheet

Non-Stocked

$474.26

Min.: 50
Mult.: 50

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Plated 45 degree Adapter Assembly

09F7A721XN13G
Sunbank / Souriau
50: $231.26
Non-Stocked

Mfr. Part #
09F7A721XN13G

Mouser Part #
649-09F7A721XN13G

Sunbank / Souriau

Circular MIL Spec Backshells Plated 45 degree Adapter Assembly

Learn More

Datasheet

Non-Stocked

$231.26

Min.: 50
Mult.: 50

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Plated 45 degree Adapter Assembly

09F7A721XN15G
Sunbank / Souriau
50: $156.82
Non-Stocked

Mfr. Part #
09F7A721XN15G

Mouser Part #
649-09F7A721XN15G

Sunbank / Souriau

Circular MIL Spec Backshells Plated 45 degree Adapter Assembly

Learn More

Datasheet

Non-Stocked

$156.82

$148.16

Min.: 50
Mult.: 50

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Plated 45 degree Adapter Assembly

09F7A721XN17G
Sunbank / Souriau
50: $478.80
Non-Stocked

Mfr. Part #
09F7A721XN17G

Mouser Part #
649-09F7A721XN17G

Sunbank / Souriau

Circular MIL Spec Backshells Plated 45 degree Adapter Assembly

Learn More

Datasheet

Non-Stocked

$478.80

Min.: 50
Mult.: 50

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Plated 45 degree Adapter Assembly

09F7A721XN19G
Sunbank / Souriau
50: $209.12
Non-Stocked

Mfr. Part #
09F7A721XN19G

Mouser Part #
649-09F7A721XN19G

Sunbank / Souriau

Circular MIL Spec Backshells Plated 45 degree Adapter Assembly

Learn More

Datasheet

Non-Stocked

$209.12

Min.: 50
Mult.: 50

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Plated 45 degree Adapter Assembly

09F7A721XN25G
Sunbank / Souriau
50: $482.70
Non-Stocked

Mfr. Part #
09F7A721XN25G

Mouser Part #
649-09F7A721XN25G

Sunbank / Souriau

Circular MIL Spec Backshells Plated 45 degree Adapter Assembly

Learn More

Datasheet

Non-Stocked

$482.70

Min.: 50
Mult.: 50

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Plated 90 degree Adapter Assembly

09F7R721XN13G
Sunbank / Souriau
50: $231.26
Non-Stocked

Mfr. Part #
09F7R721XN13G

Mouser Part #
649-09F7R721XN13G

Sunbank / Souriau

Circular MIL Spec Backshells Plated 90 degree Adapter Assembly

Learn More

Datasheet

Non-Stocked

$231.26

Min.: 50
Mult.: 50

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Plated 90 degree Adapter Assembly

09F7R721XN21G
Sunbank / Souriau
50: $122.72
Non-Stocked

Mfr. Part #
09F7R721XN21G

Mouser Part #
649-09F7R721XN21G

Sunbank / Souriau

Circular MIL Spec Backshells Plated 90 degree Adapter Assembly

Learn More

Datasheet

Non-Stocked

$122.72

$115.95

Min.: 50
Mult.: 50

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Plated 90 degree Adapter Assembly

09F7R721XN23G
Sunbank / Souriau
50: $258.09
Non-Stocked

Mfr. Part #
09F7R721XN23G

Mouser Part #
649-09F7R721XN23G

Sunbank / Souriau

Circular MIL Spec Backshells Plated 90 degree Adapter Assembly

Learn More

Datasheet

Non-Stocked

$258.09

Min.: 50
Mult.: 50

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Plated 90 degree Adapter Assembly

09F7R721XN25G
Sunbank / Souriau
50: $482.70
Non-Stocked

Mfr. Part #
09F7R721XN25G

Mouser Part #
649-09F7R721XN25G

Sunbank / Souriau

Circular MIL Spec Backshells Plated 90 degree Adapter Assembly

Learn More

Datasheet

Non-Stocked

$482.70

Min.: 50
Mult.: 50

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Plated Straight Adapter Assembly

09F7S721XN13G
Sunbank / Souriau
50: $234.01
Non-Stocked

Mfr. Part #
09F7S721XN13G

Mouser Part #
649-09F7S721XN13G

Sunbank / Souriau

Circular MIL Spec Backshells Plated Straight Adapter Assembly

Learn More

Datasheet

Non-Stocked

$234.01

Min.: 50
Mult.: 50

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Circular MIL Spec Backshells Plated Straight Adapter Assembly

09F7S721XN15G
Sunbank / Souriau
50: $239.56
Non-Stocked

Mfr. Part #
09F7S721XN15G

Mouser Part #
649-09F7S721XN15G

Sunbank / Souriau

Circular MIL Spec Backshells Plated Straight Adapter Assembly

Learn More

Datasheet

Non-Stocked

$239.56

Min.: 50
Mult.: 50

MIL-DTL-38999 III, IV

Band Lock Adapters

Nickel

Thermoplastic (TP)

Single Arm Composite Backshells

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