TownSteel CRX-K-87 Heavy Duty ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$836.00
$671.52
TownSteel CRX-K-87 Heavy Duty Asylum Function Ligature-Resistant Knob Lockset with Double Cylinder

TownSteel CRX-K-87 Heavy Duty Asylum Function Ligature-Resistant Knob Lockset with Double Cylinder

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Model: CRX-K-87-630
$836.00
$671.52
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$836.00
$671.52
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TownSteel CRX-K-87 Heavy Duty Asylum Function Ligature-Resistant Knob Lockset with Double Cylinder

The TownSteel CRX-K-87 is a Heavy Duty, ANSI Grade 1 cylindrical lockset with an Asylum Function ligature-resistant knob, suitable for behavioral, mental, and psychiatric healthcare facilities housing at-risk patients. It features a ligature-resistant stainless steel knob and tamper-resistant mounting screws, with a double cylinder keyed function and mounting on both wood and metal doors. Door thickness range is 1-3/4" to 2", with a 1-1/8" x 2-1/4" square corner face plate and a 1-1/4" x 4-7/8" ASA strike for secure, code-compliant installation.

Key Features

  • Door Thickness Compatibility: Fits doors from 1-3/4" to 2" thick.
  • Face Plate: 1-1/8" x 2-1/4" square corner face plate.
  • Door Strike: 1-1/4" x 4-7/8" ASA strike for reliable latching.
  • Ligature-Resistant Knob: Stainless steel knob reduces ligature risk in behavioral and psychiatric healthcare settings.
  • Tamper-Resistant Screws: Deter unauthorized disassembly for enhanced patient safety.
  • Versatile Door Mounting: Installs on both wood and metal doors for flexible specification.
  • Double Cylinder Keyed Function: Asylum function double cylinder keying provides controlled access for at-risk patient areas.
  • Heavy Duty Grade 1 Construction: ANSI Grade 1 cylindrical lock built for demanding, high-security institutional use.

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: Double Cylinder
  • Duty Level: Heavy Duty
  • Product Function: Asylum
  • 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 and Psychiatric Healthcare Facilities
  • Mental Health Treatment Centers
  • Correctional and Detention Facilities
  • Hospitals and Healthcare Institutions
  • Educational Facilities
  • Government and Municipal Buildings

Why TownSteel CRX-K?

TownSteel CRX-K Series locksets are engineered for facilities where patient and occupant safety is paramount, combining a ligature-resistant stainless steel knob with tamper-resistant mounting hardware and ANSI Grade 1 heavy duty construction. Built for reliable use on both wood and metal doors, the CRX-K delivers dependable, code-focused security for the most demanding behavioral healthcare environments, backed by tamper-resistant mounting hardware designed for at-risk patient areas and institutional-grade durability.

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:
Double Cylinder
Duty Level:
Heavy Duty
Grade:
Grade 1
Product Function:
Asylum
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-87-630 – Frequently Asked Questions

1) What does the asylum function on the TownSteel CRX-K-87 actually do?
The CRX-K-87 is the asylum function, which is double cylinder: it takes a key on both sides of the door, so the opening cannot be operated without a key from either direction. That is why it shows up on behavioral health and psychiatric units where staff need to control passage in both directions. If you need staff-side free egress, this is the wrong function in the CRX-K family.
2) Will the CRX-K-87 latch into the strike prep already in my frame?
The lock ships with a 1-1/4 inch by 4-7/8 inch ASA strike, which is the standard commercial frame cutout, so a hollow metal frame already prepped for ASA takes it directly. The latch face is 1-1/8 inch by 2-1/4 inch with square corners, so a door edge mortised for a round-corner faceplate will need the corners squared up or a new edge prep.
3) What makes a ligature resistant knob different from a standard commercial knob lock?
The knob on the CRX-K is shaped in stainless steel so there is no protrusion a cord, sheet or clothing can be anchored to, and it uses tamper-resistant mounting screws so the trim cannot be taken off the door with a common driver. A standard lever or ball knob gives a patient at risk an attachment point; that is the whole reason this design exists. Specify it for patient rooms, bathrooms and corridors on behavioral, mental health and psychiatric units.
4) How do I key the CRX-K-87 across a whole unit of patient rooms?
Keying is a required choice at order. Keyed different is standard, keyed alike is the one to pick when a run of locks should all take the same staff key, and there is a key code option if the facility is on an existing system, with a field to enter the code. Because the asylum function is double cylinder, both sides are keyed to whatever you specify.
5) Is there another Grade 1 heavy duty cylindrical knob lock that can substitute for the TownSteel CRX-K-87 on a behavioral health patient room door?
No. The CRX-K-87 is a Grade 1 heavy duty cylindrical knob lock with an asylum function and a ligature-resistant stainless steel knob with tamper-resistant mounting screws, intended for behavioral, mental and psychiatric healthcare facilities housing patients at risk. Other Grade 1 heavy duty cylindrical knob locks such as the Sargent 8XG04 storeroom/closet lock and the BEST 8K Series entrance function knob lock match the grade and duty level but are conventional knob designs, not ligature-resistant. If the opening is a patient room where ligature risk drives the spec, the CRX-K-87 is the one to order; the others suit standard commercial openings.
6) The CRX-K-87 is double cylinder - what do I use if the opening only needs a key on one side?
The CRX-K-87 is keyed as a double cylinder asylum function, meaning it is keyed on both sides. For an opening that only needs a key outside, the Sargent 8XG04 is a Grade 1 heavy duty storeroom/closet knob lock with a single cylinder, and the BEST 8K Series entrance function knob lock is also single cylinder at Grade 1 heavy duty. Both are conventional knobsets rather than ligature-resistant designs, so they belong on staff and service doors rather than patient rooms.
7) My door is 1-3/8 inch thick - will the CRX-K-87 fit?
No. The CRX-K-87 covers a door thickness range of 1-3/4 inch to 2 inch. For a 1-3/8 inch door, cylindrical knob locks that cover that thickness include the Falcon X101, a Grade 1 heavy duty passage knobset rated 1-3/8 inch to 2-1/4 inch, and the Corbin Russwin CK4851 Grade 1 entrance/office knob lock rated 1-3/8 inch to 2 inch. Neither is a ligature-resistant design, so a patient room opening on a thin door needs a different approach.
8) Is the CRX-K-87 Grade 1, and is that enough for a hospital corridor?
It is ANSI Grade 1, heavy duty, and built for commercial use. Grade 1 is the top cylindrical lock grade and the usual institutional spec for high-traffic openings in healthcare and education. Among heavy duty Grade 1 cylindrical knob locks we carry, the Sargent 8XG04 and the BEST 8K Series sit at the same grade but in storeroom and entrance functions, not ligature resistant asylum.
9) I need a non-keyed ligature resistant opening, is the CRX-K-87 the right model?
The 87 suffix is the asylum function, keyed on both sides. If the opening is a closet, a passage door or a room that should not be locked at all, order a different function in the CRX-K series rather than this one. On non-patient openings, non-keyed Grade 1 cylindrical options we carry include the Corbin Russwin CK4310 passage knob and the Falcon X101 passage knobset.
10) Can I retrofit the CRX-K-87 into a door that currently has a standard cylindrical lockset?
In most cases yes, because it is a bored cylindrical lock on a 2-3/4 inch backset with an ASA strike, which is what commercial cylindrical preps are already cut for. Two things to check on the existing door: it has to be at least 1-3/4 inches thick, and the edge prep needs to be square corner to suit the 1-1/8 by 2-1/4 inch faceplate.
11) Can I use a Grade 2 knob lock instead of the CRX-K-87 on a behavioral health corridor to save on the spec?
The CRX-K-87 is Grade 1 and heavy duty with a ligature-resistant knob. Grade 2 cylindrical knob locks in the same handle style include the Sargent 6G04 storeroom/closet knob lock, the Corbin Russwin CK4410 passage/closet knob lock and the Dexter C2000 Series entry/office ball knob lock. All three are conventional knobs without ligature-resistant geometry, so they are appropriate for lower-traffic openings outside the patient care area rather than as a like-for-like swap where ligature resistance is part of the specification.
12) What should I put on the non-locking doors in the same behavioral health wing where the CRX-K-87 goes on patient rooms?
The CRX-K-87 is a keyed asylum function lock. For openings in the same corridor that need latching without keying, the Falcon X101 is a Grade 1 heavy duty cylindrical passage knobset, and the Corbin Russwin CK4310 is a Grade 1 passage/closet cylindrical knob lock covering 1-3/8 inch to 2 inch doors. Both hold the Grade 1 level but use standard knobs, so specify them only where ligature resistance is not required.
13) Is a stainless steel decorative knobset the same thing as the ligature-resistant knob on the CRX-K-87?
No. The ligature-resistant knob on the CRX-K-87 is a stainless steel knob shaped to resist attachment, paired with tamper-resistant mounting screws on a Grade 1 cylindrical lock. Decorative knobsets such as the Emtek Porcelain knobs with threaded rod or the Omnia 434/PA solid brass latchset are residential-style trim and dummy or passage functions, with no ligature-resistant geometry and no keyed asylum function. They are not interchangeable with the CRX-K-87 on a patient room door.
14) I need a 5 inch backset knob lock - is there an alternative to the CRX-K-87?
The CRX-K-87 is offered with a 2-3/4 inch standard backset and a 5 inch backset, both in 630 satin stainless steel. Among comparable cylindrical knob locks, the Sargent 8XG04 Grade 1 storeroom knob lock and the Falcon W101 Grade 2 knob lock are specified at a 2-3/4 inch backset. If the door prep is set at 5 inch, the CRX-K-87 is the option that covers it.
15) What finish does the TownSteel CRX-K ligature resistant knobset come in?
630 satin stainless steel, in both the 2-3/4 inch and 5 inch backset builds. That is the standard institutional finish, so it matches the stainless push plates, hinges and pulls typically already running through a healthcare corridor.
How fast can I get the TownSteel CRX-K-87-630 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-87-630 come with a warranty?
Absolutely. The TownSteel CRX-K-87-630 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-87-630?
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
Why buy the TownSteel CRX-K-87-630 from ZenSupply?
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