TownSteel CRX-K Heavy Duty Lig...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$762.00
$612.66
TownSteel CRX-K Heavy Duty Ligature-Resistant Knob Lockset with Classroom Function and ANSI Grade 1 Rating

TownSteel CRX-K Heavy Duty Ligature-Resistant Knob Lockset with Classroom Function and ANSI Grade 1 Rating

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Model: CRX-K-84-630
$762.00
$612.66
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$762.00
$612.66
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TownSteel CRX-K Heavy Duty Ligature-Resistant Knob Lockset with Classroom Function and ANSI Grade 1 Rating

The TownSteel CRX-K is an ANSI Grade 1 cylindrical lockset featuring a ligature-resistant stainless steel knob, purpose-built for behavioral, mental, and psychiatric healthcare facilities housing patients at risk. Configured in Classroom Function with a single-cylinder keyed design, this heavy duty lockset mounts on doors ranging from 1-3/4" to 2" thick and is suitable for installation on both wood and metal doors. Tamper-resistant mounting screws add an additional layer of security appropriate for sensitive institutional environments.

Key Features

  • Door Thickness Compatibility: Fits doors from 1-3/4" to 2" thick for standard commercial and institutional door preparations.
  • Ligature-Resistant Knob: Stainless steel knob engineered to reduce ligature risk in behavioral and psychiatric healthcare settings.
  • Tamper-Resistant Mounting Screws: Deters unauthorized disassembly or tampering, an essential feature for at-risk patient environments.
  • Heavy Duty Construction: Built to withstand demanding institutional use while maintaining reliable long-term performance.
  • Wood or Metal Door Mounting: Flexible installation on either wood or metal door substrates.
  • Classroom Function, Single Cylinder: Outside knob is always locked and requires a key; inside knob is always free for immediate egress.
  • Face Plate: 1-1/8" x 2-1/4", square corner, for standard door prep compatibility.
  • Door Strike: 1-1/4" x 4-7/8" ASA strike included for standard frame preparation.

Certifications & Compliance

  • ANSI/BHMA Grade 1 Certified

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: Single Cylinder
  • Duty Level: Heavy Duty
  • Product Function: Classroom
  • 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
  • Psychiatric Healthcare Facilities
  • Mental Health Treatment Centers
  • Educational Facility Classrooms
  • Correctional and Detention Facilities
  • Commercial Office Buildings
  • Government and Municipal Buildings

Why TownSteel CRX-K?

TownSteel CRX-K locksets combine ANSI/BHMA Grade 1 performance with a ligature-resistant stainless steel knob and tamper-resistant mounting screws, giving facility managers a dependable solution for environments where patient and occupant safety is paramount. Engineered for heavy duty commercial use on both wood and metal doors, the CRX-K delivers professional-grade reliability for classroom and controlled-access doors in behavioral and mental health facilities.

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:
Single Cylinder
Duty Level:
Heavy Duty
Grade:
Grade 1
Product Function:
Classroom
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-84-630 – Frequently Asked Questions

1) Will the TownSteel CRX-K-84 fit a 2 inch thick door?
Yes. The CRX-K knob lockset covers doors from 1-3/4 inches up to 2 inches thick, so a standard 1-3/4 inch commercial door and a heavier 2 inch leaf both work. Below 1-3/4 inches it is out of range, so older 1-3/8 inch interior doors need a different lock. It mounts on wood or metal doors either way.
2) Will the CRX-K-84 latch into the strike prep I already have?
The CRX-K ships with a 1-1/4 by 4-7/8 inch ASA strike, which is the standard commercial frame prep, and a 1-1/8 by 2-1/4 inch square corner faceplate. If your frame is already cut for an ASA strike and your existing latch face is square corner at that size, it drops in. A frame with a round corner or full lip residential strike will need to be modified.
3) Why use a ligature resistant knob instead of a lever on a behavioral health door?
A lever gives a patient a protruding arm to attach a cord to. The CRX-K uses a stainless steel knob shaped so a ligature slides off, which is why it is specified for behavioral, mental, and psychiatric facilities housing at-risk patients. It also uses tamper-resistant mounting screws so the trim cannot be pulled off with a common driver. On a general office or storeroom door where ligature risk is not a concern, a standard Grade 1 cylindrical lock like the Sargent 8XG04 does the same mechanical job without the anti-ligature geometry.
4) How does classroom function work on the TownSteel CRX-K-84?
Classroom function means the outside knob is locked and unlocked only by the key from the outside; the inside knob always retracts the latch for free egress, and there is no inside button or turn a patient or student can operate. It is a single cylinder lock, so there is one keyed side. That is the point in a patient room or classroom: staff control the lock state from the corridor, and nobody can lock themselves in from within.
5) What is the closest classroom function knob lock to the TownSteel CRX-K-84 from another brand?
The Dexter C2000 Series classroom cylindrical ball knob lock is the closest classroom-function knob alternative, keyed and non-clutching, at ANSI Grade 2 and fitting doors 1-3/8 inch to 1-3/4 inch. The CRX-K-84 is ANSI Grade 1 and fits doors 1-3/4 inch to 2 inch, so on a thicker door or where a Grade 1 classroom knob is specified the Dexter will not stand in for it. The CRX-K-84 also carries a ligature-resistant stainless steel knob and tamper-resistant mounting screws, which the Dexter C2000 does not offer.
6) Which Grade 1 knob lock should I use on doors thinner than 1-3/4 inch instead of the CRX-K-84?
The CRX-K-84 covers doors 1-3/4 inch to 2 inch. For a thinner door, the Falcon X101 heavy duty Grade 1 cylindrical knobset with interchangeable core covers 1-3/8 inch to 2-1/4 inch, and the Corbin Russwin CK4851 Grade 1 entrance/office cylindrical lock with Global knob and conventional cylinder covers 1-3/8 inch to 2 inch. The X101 is a passage/closet function and the CK4851 is entrance/office, so neither delivers the classroom keying pattern the CRX-K-84 provides.
7) If the door only needs to stay locked from outside and free-egress from inside, what Grade 1 knob lock works instead of a classroom function?
A storeroom function is the usual answer there. The Sargent 8XG04 is a Grade 1 heavy duty storeroom/closet knob lock with a single cylinder and a 2-3/4 inch backset. The CRX-K-84 is a classroom function, single cylinder, and offers 2-3/4 inch standard and 5 inch backsets. Storeroom keeps the outside knob locked at all times with the key retracting the latch; classroom lets a key lock and unlock the outside knob so it can be left free during occupancy.
8) Is a Grade 2 storeroom or entrance knob lock an acceptable substitute for the CRX-K-84 on a behavioral health door?
No. Peers such as the Sargent 6G04 Grade 2 storeroom/closet knob lock with single cylinder and the BEST 8K Series Grade 1 heavy duty entrance knob lock are conventional knob locksets built for general commercial openings. The CRX-K-84 is built for behavioral, mental and psychiatric healthcare facilities housing patients at risk, with a ligature-resistant stainless steel knob and tamper-resistant mounting screws. Matching the grade or the keying alone does not reproduce the ligature-resistant knob geometry, so a patient-area opening specified for ligature resistance still needs the CRX-K-84.
9) The Sargent 28C knob trim lists a classroom function. Can it replace the CRX-K-84?
No. The Sargent 28C-KNOB is exit device trim with a knob and rose for 1-3/4 inch doors, so it mounts to an exit device rather than working as a standalone lock. The CRX-K-84 is a cylindrical lockset with a 1-1/8 inch by 2-1/4 inch square corner face plate and a 1-1/4 inch by 4-7/8 inch ASA strike, bored into a wood or metal door on its own. The shared classroom function label does not make them interchangeable hardware.
10) Can I get a run of CRX-K locks keyed alike for a whole wing?
Yes. Keying is chosen on the order: keyed different is standard, keyed alike puts multiple locks on one key for a wing or a staff set, and a specific key code can be supplied if you are matching an existing system. Give the code on the order when you pick special keying.
11) Is the TownSteel CRX-K a Grade 1 lock?
Grade 1, heavy duty, and built for commercial use. That is the top ANSI/BHMA cylindrical grade and the right level for a patient corridor or classroom door that cycles all day. Most knob locksets in this category sit at Grade 2 or 3; the Corbin Russwin CK4851 and the BEST 8K Series are other Grade 1 knob options, though neither is anti-ligature.
12) What is the difference between the CRX-K-84 and a Dexter C2000 classroom knob lock?
Both are keyed classroom function cylindrical knob locks, but they are built for different doors. The Dexter C2000 classroom knob is Grade 2 and fits 1-3/8 to 1-3/4 inch doors. The CRX-K-84 is Grade 1 heavy duty, fits 1-3/4 to 2 inch doors, and carries the ligature-resistant knob and tamper-resistant screws for at-risk patient areas. For a standard school or office classroom door the C2000 covers the function; for behavioral health it does not.
13) The classroom door does not need to be keyed at all, just latched. What Grade 1 knob lock covers that?
Two Grade 1 non-keyed knob options cover a latch-only opening: the Corbin Russwin CK4310 passage/closet cylindrical lock with Global knob, non-keyed, for doors 1-3/8 inch to 2 inch, and the Falcon X101 heavy duty Grade 1 passage/closet knobset. The CRX-K-84 is a single cylinder classroom function, so it is the choice where the outside knob has to be key-controlled rather than always free.
14) I need a fire rated knob lock for a corridor door. Do the CRX-K-84 comparables cover that?
The Falcon X101 heavy duty Grade 1 cylindrical passage knobset carries a fire rating, as does the Falcon W101 Grade 2 medium duty passage/closet knob lock with 2-3/4 inch backset. Both are passage functions, so they latch without keying. The CRX-K-84 is the Grade 1 classroom function for doors 1-3/4 inch to 2 inch with a ligature-resistant stainless steel knob, which is a different requirement than a rated corridor passage opening.
15) What finish does the TownSteel CRX-K come in?
630 satin stainless steel, in both the 2-3/4 inch and 5 inch backset. That is the standard institutional finish, so it matches existing 630 hinges, push plates, and closers already hung in most healthcare and school corridors, and the stainless knob is the same material doing the anti-ligature work.
16) Can I use a dummy knob trim to match the CRX-K-84 on a non-latching leaf?
For an inactive leaf, dummy knob trims such as the Schlage A170 single dummy Grade 2 cylindrical non-keyed knob for doors 1-3/8 inch to 1-7/8 inch, the BEST 6K Series single dummy Grade 2 medium duty knob, and the Bravura Biloxi round trim dummy knobset are the standard choices. None of them latch or key, so they cannot carry a classroom opening. On a patient-area leaf they also lack the ligature-resistant stainless steel knob and tamper-resistant mounting screws the CRX-K-84 carries.
17) Which knob locks besides the CRX-K-84 come in a single cylinder keyed configuration?
Among the comparable knob locks, the Sargent 8XG04 Grade 1 heavy duty storeroom/closet knob and the Sargent 6G04 Grade 2 storeroom/closet knob are both single cylinder, and the BEST 8K Series entrance knob is a Grade 1 heavy duty single cylinder lock. The CRX-K-84 is also single cylinder but in classroom function, and it is offered key different, keyed alike, or to a supplied key code.
How fast can I get the TownSteel CRX-K-84-630 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
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-84-630 come with a warranty?
Absolutely. The TownSteel CRX-K-84-630 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-84-630?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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