Yankee Hill Machine YHM-2055 | Nielsen Booster | 1-3/8″-24

The Yankee Hill Machine YHM-2055 Nielsen Booster Assembly provides a threaded booster interface intended for use with suppressors that utilize the 1-3/8″-24 mount. It is manufactured from 17-4 stainless steel and finished in matte black for corrosion resistance and a subdued appearance. This assembly is intended to replace a direct-thread adapter and does not include a piston; it is designed for use with handguns and barrels that require a Nielsen-style booster.

Product Specifications

• The model is listed as Nielsen / Nelson / Nielson (source data contains multiple spellings).
• The manufacturer part number is YHM-2055.
• The mount thread pitch is 1-3/8″-24 for compatibility with corresponding suppressor mounts.
• The construction material is 17-4 stainless steel.
• The finish is Matte Black.
• The product type is listed as an Adaptor (booster assembly).
• The item is intended for handgun calibers only, per source data.
• The package dimensions are listed as 2.15 x 5.15 x 7.80 inches.
• The package height is 2.3 inches, package length is 8.0 inches, and package width is 5.2 inches.
• The assembly does not include a piston and is not compatible with Sidewinder pistons, per the manufacturer notes.
• Compatible piston systems named in the source data include Silencerco, Rugged, and Deadair Odessa.
• The listed color is Black.
• The UPC for this item is 841812101215.

This Nielsen booster assembly is a straightforward replacement component for users looking to convert or restore a 1-3/8″-24 suppressor interface. Its 17-4 stainless construction and matte black finish offer a durable, low-profile solution that fits into established handgun suppressor setups when a Nielsen-style booster is required. Note that the piston must be obtained separately and compatibility should be confirmed with your suppressor and piston manufacturer.