The YHM HUB Direct Thread Mount, M13.5×1 LH, is a stainless adapter from Yankee Hill Machine that converts a HUB-compatible suppressor to a direct-thread mounting system (brand part no. YHM-2189-M). The barrel-side thread is cut to M13.5×1 LH (left-hand), while the suppressor side uses the standard 1.375×24 HUB thread. It is machined from 17-4 PH stainless steel and finished in black oxide. To install it, remove the existing mount mechanism from the suppressor, thread this mount on with a 3/4-inch open-end wrench, then thread the suppressor onto the barrel. This M13.5×1 LH version is for barrels cut with the left-hand metric thread.

Key Specifications

• The barrel-side thread is M13.5×1 LH left-hand (LH), which has to match your barrel exactly because the mount threads directly onto it.
• The suppressor-side thread is the standard 1.375×24 HUB pattern, so it fits HUB-compatible suppressors.
• It converts a HUB-compatible suppressor to a direct-thread mounting system.
• The material is 17-4 PH stainless steel, chosen for strength under repeated mounting.
• The finish is black oxide, a durable low-glare coating.
• The outer diameter is 1.5625 inches, matching the width of a HUB suppressor interface.
• The weight is 1.7 ounces, which adds very little mass to the muzzle end.
• Installation uses a 3/4-inch open-end wrench, so no special tool is required.
• The part is made in the USA by Yankee Hill Machine.

Frequently Asked Questions

How do I install it? Remove the existing mount mechanism from the suppressor, thread the HUB Direct Thread Mount on with a 3/4-inch open-end wrench, then thread the suppressor onto the barrel.

Which barrel thread does this mount fit? It is cut for M13.5×1 LH left-hand on the barrel side. YHM sells the same mount in other thread sizes, so match the thread to your barrel before ordering.

Which suppressors will this mount work with? It works with HUB-compatible suppressors that use the 1.375×24 thread on the rear.

Buy the YHM HUB Direct Thread Mount, M13.5×1 LH

Match a HUB-compatible suppressor to a M13.5×1 LH barrel with this Yankee Hill Machine mount. Order it with other suppressor parts and accessories from our Lubbock, Texas gun shop for fast, direct shipping.