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Satin chrome mortise entry lockset with screw-on knobs, right-hand orientation

Gotham

Gotham 9900RSC Satin Chrome 26D Right Hand Mortise Entry Door Lock

SKU CH-DHMN-1SZP2 MPN 9900RSC

Heavy-duty mortise entry lockset with 2-1/2" backset, solid brass cylinder, satin chrome finish, right-hand operation, and two keys included

  • FinishSatin Chrome
  • Selling UnitBox
  • TypeMortise Entry Lock Set
  • FeaturesSurface Mount Screw-on Knobs
  • Security LevelHeavy Duty
  • Location TypeCommercial/Residential
  • Heavy-duty mortise construction withstands commercial traffic
  • Right-hand orientation fits doors hinged on the right
  • 2-1/2" backset matches standard mortise preparations
  • Solid brass cylinder with two keys included
  • Satin chrome 26D finish resists wear and corrosion

Right-hand mortise entry lockset

This heavy-duty mortise lockset is built for right-hand doors in commercial and residential settings. Solid brass construction with a satin chrome finish provides durability and corrosion resistance. The lock uses a 2-1/2" backset and includes a cylinder on the exterior with a thumb turn on the interior.

Suited for new right-hand door prep

Installers fitting a right-hand entrance door with a standard mortise pocket will find the correct handing and backset here. Left-hand doors or retrofit projects needing a different backset cannot use this unit. Buyers who need an electronic credential reader or a cylindrical latch instead of a mortise case should look elsewhere.

2-1/2 inch backset determines fit

The 2-1/2" backset is the critical dimension that decides whether this lock aligns with the existing door preparation. Measure from the door edge to the centre of the cross-bore before ordering. A mismatch means the lock will not install correctly.

Highlights

  • Heavy-duty mortise construction withstands commercial traffic
  • Right-hand orientation fits doors hinged on the right
  • 2-1/2" backset matches standard mortise preparations
  • Solid brass cylinder with two keys included
  • Satin chrome 26D finish resists wear and corrosion

Specifications

BrandGotham
Model9900RSC
FinishSatin Chrome
Selling UnitBox
TypeMortise Entry Lock Set
FeaturesSurface Mount Screw-on Knobs
Security LevelHeavy Duty
Location TypeCommercial/Residential
MaterialBrass
Backset2-1/2"
KeyingKeyed Different
StyleKnobs
SeriesLike Marks 91A/26D
FunctionEntrance

Questions about this item

How do I install the 2-1/2" backset mortise lock and what step is often missed?

Mortise a pocket matching the 1-1/16" x 7-5/8" face plate, secure the lock body, then fit the surface-mounted knob plates; the step often missed is aligning the swivel spindle so both screw-on knobs engage before tightening the set screws.

Which parts of the Gotham 9900RSC will need maintenance or replacement over time?

The solid brass cylinder may need re-keying or lubrication, the 1" deadbolt latch can wear, and the two supplied keys should be duplicated; the satin chrome 26D finish on the surface-mounted plates may eventually show scratches.

What is the first limit you hit when the lock sees heavy daily use?

The 1" deadbolt throw and the swivel spindle are the first components to show wear under sustained commercial traffic, so schedule periodic lubrication to keep the screw-on knobs operating smoothly.

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