FGG.0B Quick Connect 4 Pin Plug - 9mm Outer Diameter

If you want the look and feel of aeronautical style quick-release connectors, this FGG.0B 4-pin Plug is an elegant and inexpensive alternative to official LEMO-C connectors. Sure, they're not mil-spec but they do work and look great for DIY projects, keyboard builds, robotics, wearables, and more. The connector snaps together smoothly and can disconnect only when the sleeve is pulled, which can be done one-handed with a little practice.