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Gotham
Gotham 9900LSC Satin Chrome 26D Left Hand Mortise Door Lock
Heavy-duty mortise entry lockset with satin chrome finish, 2-1/2" backset, and solid brass cylinder for commercial or residential doors
- FinishSatin Chrome
- Selling UnitBox
- TypeMortise Entry Lock Set
- FeaturesSurface Mount Screw-on Knobs
- Security LevelHeavy Duty
- Location TypeCommercial/Residential
- Heavy-duty mortise construction withstands high-traffic commercial use
- Satin Chrome 26D finish resists corrosion and daily wear
- Solid brass cylinder provides reliable key operation with two keys
- Surface-mounted screw-on knobs simplify installation on existing doors
- 2-1/2" backset fits standard commercial door preparations
Heavy-duty mortise entry lockset
The Gotham 9900LSC is a heavy-duty mortise entry lockset finished in satin chrome 26D. It uses a 2-1/2" backset and a solid brass cylinder with two keys supplied. The lock functions with a cylinder on the outside and a thumb turn on the inside. Surface-mounted screw-on knob plate assemblies complete the set.
Left-hand doors needing commercial-grade security
This lock suits left-hand doors in commercial or residential settings where a heavy-duty mortise entrance function is required. It is not suited for right-hand door swings, cylindrical latch installations, or electronic access control systems. Builders needing a different backset or a lever handle style should consider other hardware.
2-1/2" backset determines door prep compatibility
The 2-1/2" backset is the critical measurement that decides whether this mortise lock fits the existing door preparation. Verify the door's backset before purchase, as an incorrect backset will prevent installation without modifying the door. The deadbolt throw and face plate dimensions follow from this specification.
Highlights
- Heavy-duty mortise construction withstands high-traffic commercial use
- Satin Chrome 26D finish resists corrosion and daily wear
- Solid brass cylinder provides reliable key operation with two keys
- Surface-mounted screw-on knobs simplify installation on existing doors
- 2-1/2" backset fits standard commercial door preparations
Specifications
| Brand | Gotham |
|---|---|
| Model | 9900LSC |
| Finish | Satin Chrome |
| Selling Unit | Box |
| Type | Mortise Entry Lock Set |
| Features | Surface Mount Screw-on Knobs |
| Security Level | Heavy Duty |
| Location Type | Commercial/Residential |
| Material | Brass |
| Backset | 2-1/2" |
| Keying | Keyed Different |
| Style | Knobs |
| Series | Like Marks 91A/26D |
| Function | Entrance |
Questions about this item
Will the 2-1/2" backset align with the mortise pocket already cut in my door?
The lock is manufactured with a 2-1/2" backset and a 1-1/16" x 7-5/8" front face plate; measure your existing pocket against those dimensions before installation.
How can I verify the deadbolt throws fully and the thumb turn operates smoothly after fitting?
Turn the thumb turn and the supplied keys through a full cycle; the 1" deadbolt should extend and retract cleanly without binding against the strike.
Does the box include the strike plate and mounting screws, or must I purchase them separately?
The set ships with the mortise body, both knob assemblies on surface-mounted plates, a solid brass cylinder in satin chrome 26D finish, and two keys; any strike or additional fasteners are sold separately.
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