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Bright brass interior mushroom door knob with rose assembly

Marks USA

Marks USA A9223-3-M Bright Brass US3 Interior Mushroom Knob / Rose Assembly for 22 Series

SKU CH-Q2BX-AFSV7 MPN A9223-3-M

Bright brass interior mushroom knob and rose assembly for Marks 22 Series mortise locks, pre-assembled with screws for doors one to one-and-three-quarter inches thick

  • Surface finishBright Brass
  • Ready-to-install interior mushroom knob for Marks 22 Series locks
  • Bright Brass US3 finish resists corrosion and matches existing hardware
  • Pre-assembled knob and rose save time on mortise lock repairs
  • Thru-bolted design with included screws fits doors 1" to 1-3/4" thick
  • Packed one interior side per box for precise replacement ordering

Interior mushroom knob for Marks 22 Series

This pre-assembled knob and rose assembly fits the interior side of Marks 22 Series mortise locks. It arrives with screws for through-bolt mounting and suits doors between 1" and 1-3/4" thick. The bright brass US3 finish matches existing hardware. Only the interior mushroom knob is supplied.

Replaces worn or damaged interior knob on 22 Series

Swapping this assembly restores smooth latch operation when the original knob loosens or the finish wears. The upgrade is worth it when the mortise body remains sound but the interior hardware no longer turns cleanly or matches the door décor. Exterior trim and lock body are not included.

Withstands daily residential

Through-bolt fastening keeps the knob secure through repeated operation without wobble. The solid brass construction resists corrosion and finish wear under normal indoor conditions. The mushroom profile provides reliable grip for frequent cycling. Not rated for heavy-duty institutional traffic.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $57.99
Typical for this category: the median of 2,145 items is $55.99.

Specifications

Product
Brand nameMarks USA
Model nameA9223-3-M
Size & build
Surface finishBright Brass

Questions about this item

What door thickness range does the A9223-3-M knob assembly fit?

The assembly fits doors from 1" to 1-3/4" thick and includes the required through-bolt screws for installation.

How is the mushroom knob secured to the door during installation?

The knob is through-bolted with the supplied screws; the common error is tightening the bolts before aligning the spindle, which can bind the mechanism.

Will the Bright Brass US3 finish require any special maintenance over time?

Bright Brass US3 is a living finish that will naturally patina; periodic polishing with a brass cleaner restores the original shine if desired.

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