20-Position Card Edge Housing, 0.100" Pitch — Contacts Sold Separately
The TE Connectivity TWIN LEAF 583861-7 is a 20-position card edge housing designed for non-specified dual-edge cards. The housing accepts PCB edge thicknesses from 0.055" to 0.070" (1.40mm to 1.78mm), which covers common 1.6mm and 1.8mm board thicknesses. It mounts to the panel via a top-mount opening with an unthreaded 0.128" (3.25mm) diameter flange feature — no hardware is included, so plan for a separate fastener. The critical note on this listing is that contacts are not included. The housing alone is a shell — you must source the matching TWIN LEAF crimp terminals separately. Ordering just the housing and expecting a working connector is a common stockroom mistake.
Panel Mount and Card Thickness Fit
This housing is strictly panel-mount, not board-mount. The flange feature is a top-mount opening, unthreaded, 0.128" (3.25mm) diameter — you provide the screw or rivet. The card thickness window of 0.055" ~ 0.070" (1.40mm ~ 1.78mm) is the range the housing will grip; a board outside that range will either be too loose to retain the contacts or too thick to insert. Measure your PCB edge thickness before ordering.