TownSteel CRX-K-72 Back-to-Bac...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$589.00
$473.42
TownSteel TownSteel CRX-K-72 Back to Back Dummy - Satin Stainless Steel Heavy Duty Ligature Resistant Knob Cylindrical Lockset TWS-CRX-K-72

TownSteel CRX-K-72 Back-to-Back Dummy Knob Lockset - Heavy Duty ANSI Grade 1 Ligature-Resistant Cylindrical Lock

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Model: CRX-K-72-630
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$589.00
$473.42
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TownSteel CRX-K-72 Back-to-Back Dummy Knob Lockset — Ligature-Resistant Heavy Duty ANSI Grade 1 Cylindrical Lock

The TownSteel CRX-K-72 is an ANSI Grade 1 cylindrical lockset configured as a Non-Keyed Back-to-Back Dummy trim, featuring a ligature-resistant stainless steel knob purpose-built for behavioral, mental, and psychiatric healthcare facilities housing patients at risk. This Heavy Duty lockset is equipped with tamper-resistant mounting screws and can be installed on both wood and metal doors within a 1-3/4" to 2" door thickness range. The lockset uses a 1-1/8" x 2-1/4" square corner face plate and a 1-1/4" x 4-7/8" ASA strike, delivering commercial-grade durability and safety-focused design for sensitive care environments.

Key Features

  • Door Thickness Range: Accommodates doors from 1-3/4" to 2" thick for standard commercial door applications.
  • Face Plate Specification: 1-1/8" x 2-1/4" square corner face plate for precise door preparation compatibility.
  • Door Strike Specification: 1-1/4" x 4-7/8" ASA Strike for compatibility with standard frame preparations.
  • Heavy Duty ANSI Grade 1 Construction: Built to ANSI Grade 1 and Heavy Duty standards for demanding commercial and institutional environments.
  • Ligature-Resistant Stainless Steel Knob: Engineered to reduce ligature risk points, suitable for behavioral, mental, and psychiatric healthcare facilities housing patients at risk.
  • Tamper-Resistant Mounting Screws: Helps deter unauthorized disassembly or tampering in sensitive care and institutional settings.
  • Versatile Door Mounting: Suitable for installation on both wood and metal doors.
  • Non-Keyed Back-to-Back Dummy Function: Provides matching push/pull trim on both sides of the door without an active locking mechanism.

Certifications & Compliance

  • ANSI Grade 1

Technical Specifications

  • Series: CRX-K Series
  • Product Group: Mechanical Locks
  • Product Subgroup: Bored Locksets
  • Product Type: Knobsets
  • Subcategory: Cylindrical Locks
  • Commercial/Residential: Commercial
  • Keyed Function: Non-Keyed
  • Duty Level: Heavy Duty
  • Product Function: Back to Back Dummy
  • Door Thickness Range: 1-3/4" to 2"
  • Face Plate: 1-1/8" x 2-1/4", square corner
  • Door Strike: 1-1/4" x 4-7/8", ASA Strike
  • Product Category: Mechanical Locks
  • Department: Door Hardware

Typical Applications

  • Behavioral Health Facilities
  • Mental Health Treatment Centers
  • Psychiatric Care Units
  • Correctional Facilities
  • Hospitals and Clinical Settings
  • Assisted Living and Memory Care Facilities
  • Institutional Healthcare Environments

Why TownSteel CRX-K?

TownSteel CRX-K lockset products deliver professional-grade reliability with Heavy Duty, ANSI Grade 1 construction designed specifically for the safety demands of behavioral and psychiatric care environments. The combination of a ligature-resistant stainless steel knob and tamper-resistant mounting hardware reflects a construction approach focused on patient safety and facility security. Engineered for wood or metal door installations, this lockset supports dependable performance in the most safety-critical institutional settings.

Product Specs

Series:
CRX-K Series
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Knobsets
Subcategory:
Cylindrical Locks
Commercial/Residential:
Commercial
Lock Type:
Cylindrical
Handle Type:
Knob
Keyed Function:
Non-Keyed
Duty Level:
Heavy Duty
Grade:
Grade 1
Product Function:
Back to Back Dummy
Door Thickness Range:
1-3/4" to 2"
Face Plate:
1-1/8" x 2-1/4", square corner
Door Strike:
1-1/4" x 4-7/8", ASA Strike
Product Category:
Mechanical Locks
Department:
Door Hardware

TownSteel CRX-K-72-630 – Frequently Asked Questions

1) What is a back-to-back dummy knob like the TownSteel CRX-K-72 actually used for?
A back-to-back dummy has a fixed knob on each face of the door and no latch at all. Nothing retracts, nothing catches. You use it on an inactive leaf of a pair, on a closet or wardrobe door held shut by a roller or magnetic catch, or where you just need a pull that matches the working locks on the rest of the openings. If the door has to stay closed on its own, this is the wrong part; the CRX-K family runs latching functions for that. The CRX-K-72 is non-keyed.
2) Will the TownSteel CRX-K-72 dummy knob fit a 1-3/4 inch door?
Yes, 1-3/4 inches is right in range. The CRX-K-72 covers 1-3/4 inch to 2 inch doors, so it takes the standard commercial leaf and the heavier 2 inch doors used in secure and behavioral health rooms. It will not work on a 1-3/8 inch door, which is the common older residential interior thickness. It mounts on wood or metal doors.
3) Which backset do I order for the TownSteel CRX-K-72 knob, 2-3/4 or 5 inch?
Two backsets are offered: 2-3/4 inches standard and 5 inches. Measure from the door edge to the center of the existing bore. 2-3/4 inches is the normal commercial bore. The 5 inch backset is for wide stile aluminum and narrow stile applications where the knob has to sit further in from the edge. Both come in 630 satin stainless steel.
4) What is the closest Grade 1 heavy duty knob equivalent to the TownSteel CRX-K-72 for a standard opening that does not need a ligature-resistant knob?
The CRX-K-72 is a Grade 1 heavy duty non-keyed cylindrical knobset with a ligature-resistant stainless steel knob and tamper-resistant mounting screws. Where the opening does not call for ligature resistance, the Falcon X101 is a Grade 1 heavy duty cylindrical passage knobset in the X Series with an interchangeable core and a 1-3/8 inch to 2-1/4 inch door thickness range. The Corbin Russwin CK4310 is also Grade 1, a passage/closet cylindrical lock with a Global knob covering 1-3/8 inch to 2 inch doors. Both hold the Grade 1 rating; neither carries the ligature-resistant knob or tamper-resistant screws of the CRX-K-72.
5) Which dummy knob trims are alternatives to the TownSteel CRX-K-72 back to back dummy on a lower duty opening?
The CRX-K-72 is a Grade 1 heavy duty back to back dummy, meaning a fixed knob on both faces with no latch. For dummy applications that do not need Grade 1, the Schlage A170 is a Grade 2 heavy duty single dummy trim in the A Series covering 1-3/8 inch to 1-7/8 inch doors, and the BEST 6K-1DT is a Grade 2 medium duty single dummy trim in the 6K Series. Both of those are single dummy trims, so a back to back application takes two, while the CRX-K-72 is supplied as a back to back set.
6) The TownSteel CRX-K-72 will not work because the door needs to latch. What Grade 1 knob lock should be used instead?
The CRX-K-72 is a back to back dummy, so it is a pull on both faces with no latch and no keying. On an opening that has to latch, the Sargent 8XG04 is a Grade 1 heavy duty storeroom/closet knob lock with a single cylinder and 2-3/4 inch backset, and the BEST 8K-AB is a Grade 1 heavy duty entrance function single cylinder knob lock in the 8K Series. For a latching opening with no key, the Falcon X101 is a Grade 1 heavy duty passage knobset. All three carry the same Grade 1 rating as the CRX-K-72.
7) Which knobsets fit a door thinner than the TownSteel CRX-K-72 range covers?
The CRX-K-72 covers doors 1-3/4 inch to 2 inch thick. For a thinner door, the Corbin Russwin CK4310 Grade 1 passage/closet knob covers 1-3/8 inch to 2 inch, the Falcon X101 Grade 1 heavy duty passage knobset covers 1-3/8 inch to 2-1/4 inch, and the Schlage A170 dummy trim covers 1-3/8 inch to 1-7/8 inch. On a 1-3/8 inch door, those three reach where the CRX-K-72 does not.
8) Do I need to cut a strike or latch prep for a CRX-K-72 back-to-back dummy?
No strike prep is needed for the dummy itself, because there is no latch to catch anything. The CRX-K series is specified with a 1-1/4 x 4-7/8 inch ASA strike and a 1-1/8 x 2-1/4 inch square corner face plate on its latching functions, so if you are ordering dummies and working locks for the same run of doors, that is the frame prep the working ones expect. Standard ASA prep in a hollow metal frame takes them without modification.
9) What is the difference between a back-to-back dummy and a single dummy knob?
A back-to-back dummy puts a knob on both faces of the door; a single dummy is one knob on one face only. The CRX-K-72 is the back-to-back version, so it suits a door people push from either side, like an inactive leaf in a pair or a double-swing closet. If only one side is ever touched, a single dummy such as the Schlage A170 single dummy trim or the BEST 6K Series single dummy trim covers it with half the hardware. Note those two are Grade 2, not Grade 1 like the CRX-K.
10) What else could I use instead of the TownSteel CRX-K-72 if I do not need ligature resistance?
If the opening is an ordinary commercial door and there is no suicide risk to design around, a standard dummy trim is cheaper hardware to specify. The Schlage A170 single dummy trim is Grade 2 heavy duty and covers 1-3/8 to 1-7/8 inch doors; the Cal-Royal BA40 dummy knob covers 1-3/8 to 1-3/4 inch. Neither is ligature resistant, and neither reaches 2 inch doors the way the CRX-K-72 does. On a behavioral health unit, stay with the CRX-K.
11) Does the CRX-K-72 dummy knob need handing?
No handing to specify. A back-to-back dummy has a fixed knob on each face with no latch and no cam, so it installs the same on a left or right hand door, inswing or outswing. The only two choices on the order are backset, 2-3/4 inch standard or 5 inch, and the finish, 630 satin stainless steel.
12) Are decorative dummy knobsets such as the Emtek or Omnia sets an equivalent to the TownSteel CRX-K-72?
They share the dummy function but not the construction. The CRX-K-72 is a Grade 1 heavy duty commercial cylindrical knobset with a ligature-resistant stainless steel knob and tamper-resistant mounting screws, for behavioral, mental, and psychiatric healthcare facilities housing patients at risk. The Emtek Arts and Crafts Hammered Egg dummy pair and the Omnia 434/0 and 442/00 single dummy knob latchsets are dummy-function knobs of solid brass construction in traditional shapes. Those are interior decorative trims; the ligature-resistant knob profile and tamper-resistant screws are specific to the CRX-K-72.
13) Is the Cal-Royal BA40 dummy knob a substitute for the TownSteel CRX-K-72?
The Cal-Royal BA40 is a dummy knob cylindrical lock in the Barrington BA Series covering doors 1-3/8 inch to 1-3/4 inch thick. The CRX-K-72 is a Grade 1 heavy duty back to back dummy covering 1-3/4 inch to 2 inch doors with a ligature-resistant stainless steel knob. The two overlap only at 1-3/4 inch: below that the BA40 is the one that fits, above it the CRX-K-72 is.
14) What is the difference between the TownSteel CRX-K-72 and a Grade 2 passage knob like the Corbin Russwin CK4410 or Dexter C2000 passage?
The CRX-K-72 is Grade 1 heavy duty and non-keyed, with a fixed knob on both faces. The Corbin Russwin CK4410 is a Grade 2 passage/closet cylindrical lock with a Global knob for 1-3/8 inch to 1-3/4 inch doors, and the Dexter C2000 passage is a Grade 2 non-keyed cylindrical ball knob lock, non-clutching, for the same 1-3/8 inch to 1-3/4 inch range. Both of those retract a latch when the knob is turned; the CRX-K-72 does not.
15) Is a residential passage knob such as the Kwikset 200P Polo an alternative to the TownSteel CRX-K-72?
The Kwikset 200P Polo is a passage door knob for interior hall and closet openings, supplied with a 6AL latch and RCS round corner strike. The CRX-K-72 is a commercial Grade 1 heavy duty back to back dummy with a ligature-resistant stainless steel knob, and it takes a 1-1/4 inch by 4-7/8 inch ASA strike with a 1-1/8 inch by 2-1/4 inch square corner face plate. The 200P is a latching interior knob with round corner prep; the CRX-K-72 is a fixed dummy with commercial ASA strike prep.
16) Can I match the TownSteel CRX-K-72 to other Grade 1 knob locks already on my building's doors?
Visually it will read as stainless, since the CRX-K-72 comes only in 630 satin stainless steel, which is the standard commercial stainless finish other Grade 1 knob lines are also offered in. Functionally, if you want keyed and latching functions on the surrounding doors at the same Grade 1 heavy duty level, the Sargent 8XG04 storeroom knob lock and the BEST 8K Series entrance knob lock are both Grade 1 heavy duty knob locks. What they do not carry is the ligature-resistant knob profile, so mixing them onto patient-accessible doors defeats the point of specifying the CRX-K in the first place.
17) Is a cylindrical dummy like the CRX-K-72 the right choice, or should I be looking at mortise?
Cylindrical is the simpler prep: a bored hole through the door face, which is what most existing wood and hollow metal doors already have. The CRX-K-72 is a cylindrical lockset and mounts to wood or metal doors, so on a retrofit it reuses the existing bore rather than asking you to route a mortise pocket. Mortise makes sense when you need the heavier case and the trim options that go with it, or the door is already mortise prepped. For a dummy specifically, there is no security case for mortise; nothing is latching.
How fast can I get the TownSteel CRX-K-72-630 delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the TownSteel CRX-K-72-630 come with a warranty?
Absolutely. The TownSteel CRX-K-72-630 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the TownSteel CRX-K-72-630?
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