Plan B HUB Mount Adapter
1.375–24 HUB adapter. Converts a HUB-compatible suppressor to the Plan B mounting system. 4150 CMV steel.
Part no. PB-HUB-1375
This is the suppressor-side half of the Plan B system. The 1.375–24 internal HUB thread screws into the rear of a HUB-compatible suppressor; the .900–24 external thread and 25-degree taper present the Plan B mounting interface to a Plan B muzzle device.
Where it sits in the system
- Barrel thread → Plan B muzzle device (1/2–28 or 5/8–24)
- Plan B muzzle device → this adapter's .900–24 / 25° taper
- This adapter's 1.375–24 HUB thread → your suppressor's rear interface
Installation. Install into a compatible HUB suppressor at 35 ft-lb.
Verify every interface before you buy. Thread pitch, muzzle-device geometry, suppressor bore and mount depth all have to agree. "HUB compatible" is not blanket approval — confirm the exact suppressor model against its manufacturer's current drawings. Installed, fired or modified products cannot be returned.
| HUB thread | 1.375–24 |
|---|---|
| External thread | .900–24 |
| Taper | 25 degrees |
| Install torque | 35 ft-lb |
| Overall length | .700 in. |
| Weight | 1.7 oz. |
| Material | 4150 CMV steel |
| Finish | QPQ nitride |
| Origin | Made in America |