Schlage D Series Heavy Duty Tulip Knob

Schlage D Series Heavy Duty Tulip Entrance Knob (D53PD) in Satin Chrome (626)
Retail Price: $394.00
Our Price: $240.34
You save 39%
SKU: D-Series (TUL)
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Customize Your Schlage D Series Heavy Duty Tulip Knob
For Help with Functions Click Red ? above
Choose "keyed alike" to use the same key on multiple locks
Enter key # if you want custom keying

Heavy duty performance for high traffic applications.
At Schlage, they know that every product has to stand up to constant use and abuse without compromising security. The D-Series gets the job done with tough, dependable ANSI Grade 1 locks designed for use in military barracks, back-of-house hospitality and retrofit applications. Built for heavy traffic applications, D-Series locks are easy to service and maintain, and come in a range of styles and finishes to fit your building.

Schlage D-Series knobs are built to tough manufacturing standards that ensure a long life with smooth performance. With finishes to fit your building design, and a choice of styles, the D-Series is one of the toughest knobs Schlage make.


  • Handing: All functions are field reversible. Please click RED quesiton mark next to function box for detailed explanation on available functions
  • Door Thickness: 1 3/8” to 2” standard. 2” to 2 1/2” available for additional fee
  • Backset: 2 3/4” standard. 2 3/8”, 3 3/4” and 5”
  • Faceplate: Brass, bronze or stainless steel. 11/8” x 21/4”  square corner, beveled.
  • Lock Chassis: Steel, zinc dichromate plated for corrosion resistance.
  • Latch Bolt: Brass, 1/2” (12mm) throw, deadlocking on keyed and exterior functions. 3/4” throw anti-friction latch available for pairs of fire doors.
  • Exposed Trim: Wrought brass, bronze or stainless steel.
  • Strike: ANSI curved lip strike 11/4” x 4 7/8” x 13/16”lip to center standard. Optional strikes, lip lengths and ANSI strike box available.
  • Cylinder & Keys: 6-pin Everest C123 keyway standard with two patented nickel silver keys per lock.
  • Keying Options: Full size interchangeable core and Primus® high security cylinders. Master keying, grand master keying and construction keying.
  • Warranty: Three-year limited warranty.




ANSI Certification

A156.2 Series 4000, Grade 1 lock knob torque requirements


2-3/8", 2-3/4", 3-3/4" &  5"

BHMA Certification

Grade 1


D Series

Cross Bore


Door Thickness

1 3/8” to 1 7/8” (35 mm to 48 mm) standard. 2” (51 mm) to 2 1/2” (64 mm) available (additional charge)

Edge Bore



See drop down fucntion menu



Handle Style

Metal Knob

Latch Faceplate

Square corner standard. Please specify in notes for Drive-In or  Round Corner

Product Class