Hooked Breech Plug, for Thompson Center Hawken Rifle,
percussion, 15/16" octagon, with special 11/16-20 threads
Part Number: PLUG-TC-15-11
Availability: In Stock
Price: $49.99
Order Quantity:
Create a new barrel assembly for your Thompson Center Hawken rifle, or similar imported Hawken rifle by Investarm, Italy. Our hook will match the tang on your Cabela's, Lyman, or Investarm rifle, with very little hand fitting required. It will not fit replica rifles made in Spain.

Tapped for a standard 1/4-28 nipple, order #RST-S

Thompson Center does not sell their breech plug. We manufacture these nearly identical plugs in the U.S.A. This is the plug, only. If you need the tang, inquire, and specify 15/16" octagon.

Apply Birchwood Casey's Choke Tube Lube (anti-seize grease) to nipple threads, to allow easy removal. Order our #BC-CTL.

Drilled with a .360" powder chamber, use this breech plug with a .38 caliber or larger bore. The ignition channel is permanently sealed an invisible location.

Threaded 11/16-20, this wax cast steel plug is CNC machined, with no thread relief, for maximum strength. The octagon flats are very slightly oversize, to easily blend with the barrel flats, when filed and polished.

This style was originally used on .45 or .50 caliber Thompson Center Hawken rifles, percussion, right hand, with a 15/16" octagon barrel. New barrels from .38 to .54 caliber can be made. Most new barrels are made with 5/8-18 breech threads. This plug will NOT fit most new barrels, but will retro-fit T/C factory barrels threaded 11/16-20. Italian made barrels have metric threads, which must be enlarged to accept this plug.

T/C factory barrels often require this 11/16-20 threaded plug. Due to the complexity of the work, we do not recommend converting T/C Hawken rifles from flint to percussion. A used rifle may cost less.
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