If you need to add a panel-mount connection for USB B, but don't have the time or tools to cut a custom oval or square hole, this Round Panel Mount
Micro USB B Jack to USB A Plug Round Panel Mount Adapter Adafruit 4213 : Electronics
This one in particular is for USB Host applications. It's designed to easily attach to a panel up to 16mm thick, or as thin as a few mm. Perfect for
USB A Jack to Micro USB B Jack Round Panel Mount Adapter PCM-RPMC-47 (Pack of 500)
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For customized USB device solutions; allows the USB connection to be mounted on a secure easily accessible panel. The USBPNLBFBM1 USB B to USB Panel mount cable features a USB type B male connector on one end, and a USB panel mount B (female) molded connector on the other, providing a convenient solution for custom enclosures (e.g. internally mounted hard drives).
Startech 3 ft Panel Mount USB Cable B to B - F/M USBPNLBFBM3
USB Panel Mount B to Socket -- DataPro
with good quality and factory price, order from Original China OEM factory online shop.
Straight USB A Jack to Micro USB B Jack Round Panel Mount Adapter
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Buy Wholesale China Usb A Rj45 Panel Mount 2 Ports Screw Extension Cable & Usb Rj45 Panel Mount Cable at USD 3