MX CD Male Plug Connector For Sony Telephone 4.75mm x 1.7mm (MX-47)

Getting the barrel dimensions exactly right matters on a small power plug like this one - a connector that's even slightly off in outer or inner diameter either won't seat fully or won't make a reliable connection. This plug is sized specifically to the 4.75mm x 1.7mm standard used on a line of older Sony telephone equipment, making it the correct replacement part when that equipment's original power cable connector fails, rather than forcing a mismatched generic plug onto a port it was never quite sized for. A small, specific part that matters precisely because a near-miss size doesn't actually work.