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Polished brass right-hand mortise lever lockset with double cylinder visible

Marks USA

Marks USA 2750C/3 Polished Brass Right Hand Mortise Double Cylinder Door Lock

SKU CH-VJTK-0FDKH MPN 2750C/3

A right-hand mortise double-cylinder lockset with a 1-inch backset and polished brass lever trim for steel security doors

  • FinishPolished Brass
  • Selling UnitBox
  • TypeMortise Lockset
  • FeaturesThinline Slim Line Lockset
  • MaterialBrass
  • Backset1 inch
  • Slim profile suits narrow stile doors
  • Polished brass finish resists corrosion and tarnish
  • Double cylinder requires key on both sides
  • Right-hand configuration matches door swing direction
  • One-inch backset fits standard mortise prep

Marks Thinline Slim Line Mortise Lockset

The Marks USA 2750C/3 is a polished brass mortise lockset designed for right-hand doors in commercial and heavy-residential settings. Its Thinline Slim Line profile suits steel security and storm doors where a standard mortise body would not fit.

Thermals Noise and Power Draw

As a purely mechanical lockset the unit generates no heat, produces no audible noise beyond normal latch operation and draws no electrical power. Routine maintenance is limited to occasional lubrication of the bolt and cylinder mechanisms.

Build Fit and Freedoms

The lockset requires a 1 inch backset preparation and mounting screw holes spaced at 8-1/4 inches on the door face. A double cylinder design means a key is needed on both sides, which restricts egress without a key but eliminates the need for a separate deadbolt and thumb-turn assembly.

Highlights

  • Slim profile suits narrow stile doors
  • Polished brass finish resists corrosion and tarnish
  • Double cylinder requires key on both sides
  • Right-hand configuration matches door swing direction
  • One-inch backset fits standard mortise prep

Specifications

BrandMarks
Model2750C/3
FinishPolished Brass
Selling UnitBox
TypeMortise Lockset
FeaturesThinline Slim Line Lockset
MaterialBrass
Backset1 inch
KeyingKeyed Different
StyleLever
Series2750C
FunctionDouble Cylinder

Questions about this item

How do I install the 2750C/3 mortise lockset on a steel security door with 8-1/4 inch screw spacing?

Mortise a pocket matching the 1 x 9-7/16 inch face plate, insert the lock body with the 1 inch backset, align the thru-bolted brass trim plates to the 8-1/4 inch mounting holes, and secure; the spring-loaded captivated spindles self-adjust so levers need no set-screw tightening.

Which parts of the Marks 2750C/3 will need replacement after heavy commercial use?

The spring-loaded captivated spindles and the brass lever return springs are the wear items; cylinders can be re-keyed rather than replaced, and the solid brass trim plates rarely fail.

What stops the double-cylinder deadbolt from throwing smoothly after thousands of cycles on a storm door?

Debris buildup in the 1 inch deep mortise pocket and latch bolt channel is the first limit; regular cleaning keeps the deadbolt throwing cleanly.

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