M85049 Sunbank backshells


M85049 Sunbank backshells – Reliable interconnect solutions backshell is a mechanical device screw into the rear of an electrical connector. The more popular backshells are strain relief, cable clamps, adaptors or banding backshell.

Air Cost Control offers a wide range of SUNBANK ‘s product. M85049 Sunbank Backshells protect the electrical connector the cable link. From external physical stress (strain, shock, vibration) as electromagnetic interference that can occur when lightning strikes an aircraft. 

Two self-locking technologies exist: 

A detented system and the SUNBANK Self-seating mechanism. The second one exceeds the vibration requirements. A free rotatable coupling is also available.

1. Banding backshell

The banding backshell is an efficient solution. For terminating overall and individual cable shielding. Where future maintenance or reparability are required. These backshells utilize a metallic cable tie, named band, for full 360° shield/screen termination with low DC resistance available.

These backshells are available in versions. For use with shrink boots or molded part.




2. Cable clamp strain relief

Strain relief clips are a cost-effective way of holding up your cables and connectors and protecting them from strain.

For example, from any movement against the cable’s housing. This solution also provides good strain. Relief at the termination area. 

It is a cost-effective cable holding. Option when environmental protection is not a concern. Moreover this is weight saving solution.




MIL-DTL-38999 Series III & IV EN3645

AS50151 solder MIL-DTL-26482 Series 2 MIL-DTL-83723 Series 3 EN2997 & EN3646


Cable clame strain relief


3. EMI & environmental backshell

Both individual and overall shieldings can be terminated in this type. It is an ideal choice for heavy duty cabling solutions in harsh environment. These backshells ensure connector reliability and performance by adding extra protection from external hazards.

Environmental backshells use a glands to seal both entry points, to prevent the ingress of dust, dirt, moisture, and liquids. Additional shield termination hardware provides EMI/RFI protection. these backshells are available in 3 configurations : straight, 45°, or 90°.





MIL-DTL-38999 Series I & II

MIL-DTL-38999 Series III & IV

MIL-DTL-27599 MIL-DTL-38999 Series I & II




4. EMI/RFI backshell

M85049 Sunbank backshells are designed for mechanical applications with straight, 45° and 90°, split shell configurations to resolve design difficulties and find the right solution. No tools are necessary to do the shielding termination. Various termination are available as one ring, two rings or three rings. These solutions can be used on wide range of application. which use a shield braid. Individual pigtail braid. Or individual braiding.



MIL-DTL-38999 Series III & IV EN3645





5. Grommet nut

Backshell provides protection and compression of the connector grommet. Moreover this is an efficient solution. For holding the contacts. And in place when terminated with wire bundles.

Grommet nuts are typically used inside box applications where there is no EMI/RFI, environmental or strain-relief constraints. Some OEMs require that all connectors be equipped with a backshell that’s why the simple Grommet nut has broad application in the interconnect industry.



AS50151 crimp MIL-DTL-26482 Series 2 MIL-DTL-83723 Series 3 EN2997 & EN3646





6. Potting & shrink boot adapter

This backshell is used to terminate with heat shrink boots which provides environmental protection and strain relief to cable termination. A slot is machined into each backshell in order. To attach a heat shrinkable boot. The dimension is optimized to integrate various standard boots.



AS50151 crimp MIL-DTL-26482 Series 2 MIL-DTL-83723 Series 3 EN2997 & EN3646

MIL-DTL-27599 MIL-DTL-38999 Series I & II

Multi configurations: straight, 45°, 90°

Plating: nickel, cadmium, zinc nickel, black anodized, passivate (for stainless steel only)


shrink boot adapter


Temperature range:

Electroless nickel: -65 to +200°CPassivate: -65 to +200°COther platings: -65 to +175°C

Shell conductivity:

Aluminum: R < 2.5 mΩComposite: R < 2.5 mΩStainless steel: R < 5 mΩ Marking in accordance with MIL-STD-1285

Salt spray resistance:

Aluminum shell:

Electroless nickel : 96 hours

Black anodize: 500 hours

Cadmium: 1000 hours

Zinc nickel: 1000 hours

Passivate: 1000 hours

Electroless nickel: 2000 hours

Cadmium: 2000 hours

Zinc nickel: 2000 hours