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Polished brass mortise lock thumb turn knob disc with spring loaded cam

Progressive Hardware Co., Inc.

Progressive Hardware Co., Inc. 704-04-11 door lock

SKU CH-ZRHR-PN4KV MPN 704-04-11

Mortise lock thumb-turn knob disc with standard throw, solid brass spring-loaded cam, 3/16" square hub, polished brass finish

  • Surface finishPolished Brass
  • Solid brass construction resists wear
  • Spring-loaded cam ensures smooth operation
  • Fits standard-throw mortise deadlocks
  • 3/16" square hub matches existing hardware

Mortise lock thumb turn knob disc

The Progressive Hardware 704-04-11 is a replacement turn knob disc designed for mortise deadlocks with a standard throw. It features a polished brass finish and a solid brass construction with a spring-loaded cam. The disc uses a 3/16 inch square hub and is secured by the cylinder locking screw rather than threads. This part suits homeowners or locksmiths repairing or maintaining existing mortise lock hardware.

Installation fits standard throw deadlocks

The non-threaded design relies on the existing cylinder locking screw for retention, simplifying the fitting process for compatible mortise locks. Solid brass construction provides durability and corrosion resistance for long-term operation. The spring-loaded cam ensures positive engagement with the lock mechanism during daily use. Buyers needing a threaded spindle or a different hub size will require alternative hardware.

How it compares

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

Price $34.99
Cheaper than about 59% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameProgressive Hardware Co., Inc.
Model name704-04-11
Size & build
Surface finishPolished Brass

Questions about this item

How do I install the 704-04-11 thumb turn disc onto the 3/16" square hub and secure it with the cylinder locking screw?

Slide the disc onto the 3/16" square hub, align the spring-loaded cam with the mortise lock mechanism, then tighten the cylinder locking screw to hold it in place.

Will the polished brass finish on the 704-04-11 thumb turn knob disc need periodic polishing or replacement over time?

The solid brass construction resists corrosion; occasional polishing maintains the shine, and the spring-loaded cam is designed for long-term operation without scheduled replacement.

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