Matco brake bleeder valve assembly MSCBBS(S)S. Latest generation bleeder assembly provides a seal and wrenching feature for either US or metric sizes.
1/8" NPT threads
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This part has a 1/8" NPT threads.
The black cover shown in the photo is a dust cover. It is removed and the valve stem is opened 1/2 to 1& = turns to allow flow through the bleeder. When complete, the bleeder is tightened about 30-40 in-lb and the dust cap reinstalled.
These are not FAA approved. For your aircraft you would need, 081-00100 and 079-00300.