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required. Whether the other end that connects to the gimbal is HDMI is up to the gimbal supplier. Using a custom connector gives the gimbal developer control of the reliability of the connection because a more reliable connector and socket can be used, but that increases the costs. A standard HDMI cable is far cheaper but may have reliability issues in a harsh environment with lots of vibration. USB and HDMI are probably the two best connector systems, but there are many more, with varying levels of reliability, ruggedness, pin pitch, data throughput and ways to attach them to a board. Several of these come from the aerospace industry (where standards such as ARINC are strong and there is crossover with MIL-DTL-26500) but are extending to high-reliability systems. While the cost of military-grade connectors may be an issue, availability is more of a factor. Lead times can be more than 12 weeks, compared with two weeks for a plastic connector and eight for a metal design. That is why some distributors hold stocks of connector parts that can be configured to customer requirement and shipped within 24 or 48 hours. 5015 MIL-DTL-5015 (formerly MIL-C-5015) circular connectors are extremely rugged for harsh environments, with threaded or bayonet coupling with solder or removable crimp contacts, front and rear release. These were originally designed for military aircraft, and are now used in industrial applications such as mass transit, military ground vehicles, earth- moving equipment and off-road vehicles. 26482 MIL-DTL-26482 (formerly MIL-C-26482) connectors are quick-disconnect circular connectors that use bayonet coupling and are environmentally sealed. They use an aluminium alloy shell with