This is a Brass Trailer Caliper Bleeder Fitting, which is the same size that many standard Trailer Disc Brake Calipers on the market use. This Bleeder will fit Deemaxx Calipers, Kodiak Calipers, and many others. This Brass Bleed Port is a 2 piece Bleeder, the Adapter, which gets installed into the Caliper, features a 1/8” NPT, and the smaller part, the part used during the bleeding process, features ¼”- 28 Thread.
Most of the time, a caliper will have 2 of these Bleeder Ports. The Adapter portion of the bleeder should be installed into the caliper using Thread Locker to provide an Airtight seal. The Bleeder Portion should not get thread locker, as that part of the fitting needs to be loosened and opened when the brakes get bled.
-2 Part Brass Bleeder Valve
-1/8” Pipe Thread on the Adapter Fitting to the Caliper
-1/4” – 28 Thread on the Bleeder Port to the Adapter Fitting