HR25A Miniature Push-Pull Connectors Hirose Electric HR25A Miniature Push-Pull Connectors are small size, high density devices. The outside diameters are 4, 6, and 8 positions at 11mm or 12, 16, and 20 positions at 13mm. Hirose HR25A connectors feature push-in, pull-out mating and unmating. A built-in lock securely locks mated connectors while still allowing for a quick disconnect by pulling the plug release collar.