These miniature push-to-connect straight fittings have M3 threads and accept 1/8" OD hose. They're perfect for use with M3 threaded solenoids when you need to provide close, professional looking air lines. Great for Autocockers, this will replace a barb. You can disconnect your micro hose and reconnect in seconds without hose damage. Great for when doing maintence such as oiling pneumatics. Sold in packs of 3
The Air Soldier Products Camozzi M3 1/8" Straight Push-To-Connect is older, so while it may be available used and in a few cases new, it is not commonly available anymore.