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Pair of satin chrome door knobs with rose assemblies and spindles

Progressive Hardware Co., Inc.

Progressive Hardware Co., Inc. K6220/26D Satin Chrome Knob Rose Assembly Kit Pair

SKU CH-BN1F-V9092

Satin chrome knob and rose assembly kit with spring-loaded 9/32-inch square spindles, thru-bolted for Marks 22AC mortise locks, includes screws for two door thicknesses

  • FinishSatin Chrome
  • Selling UnitPair
  • Satin Chrome finish resists tarnish and fingerprints
  • Thru-bolted design secures knob firmly to mortise lock
  • Spring-loaded 9/32" square spindles ensure smooth lever action
  • Includes screws for 1-3/8" and 1-3/4" door thicknesses
  • Pre-assembled knob and rose saves installation time

Door knob rose assembly kit for mortise locks

This kit supplies a matched pair of pre-assembled knob and rose units finished in satin chrome. It is designed for residential or light-commercial doors fitted with mortise lock bodies. Builders and maintenance teams can install the hardware on both 1-3/8-inch and 1-3/4-inch door thicknesses using the included screws.

Thru-bolted spring-loaded spindles at 9/32-inch

Each unit ships with two spring-loaded spindles measuring 9/32 inch square that mount through the door with thru-bolts. This fastening method locks the knobs solidly to the mortise chassis and prevents the rotational play common with surface-mounted alternatives. The square spindle profile matches the 22AC knob specification from Marks USA.

Replaces Marks USA K9220

The box contains the complete pair plus mounting screws for the two standard door thicknesses, so no separate hardware purchase is required. Knobs and roses arrive pre-assembled, cutting installation time on retrofit or new-build projects. Buyers needing a different finish, a single-sided set, or compatibility with cylindrical lock bodies will need a different product.

Highlights

  • Satin Chrome finish resists tarnish and fingerprints
  • Thru-bolted design secures knob firmly to mortise lock
  • Spring-loaded 9/32" square spindles ensure smooth lever action
  • Includes screws for 1-3/8" and 1-3/4" door thicknesses
  • Pre-assembled knob and rose saves installation time

Specifications

FinishSatin Chrome
Selling UnitPair

Questions about this item

What does the thru-bolted design mean when the knob set is installed on a mortise lock?

The knobs fasten through the door with bolts rather than surface screws, giving a rigid connection that resists twisting on heavy iron-gate or mortise lock applications.

How does the 9/32" square spindle interface limit which locks this kit can operate?

The spring-loaded spindles are 9/32" square, so they only fit mortise locks and iron-gate locks manufactured for that exact spindle size; other spindle dimensions will not engage.

What door thicknesses can the included hardware accommodate without extra parts?

The kit ships with screws for both 1-3/8" and 1-3/4" doors, so it mounts directly on either thickness without needing longer or shorter fasteners.

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