Miniature fittings adapt Imperial/English threaded components to metric ones. They include M3 internal to M5 external; M3 external to M5 external nipple or M3 internal extension; and M3 external universal nipple. Also available are 10-32 external to M3 or M5 internal; 10-32 internal to M5 internal or M6 external; and 10-32 or M5 internal to M3 external fittings.