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Cal-Royal NM8453 Heavy Duty Grade 1, Entrance - F20 - cal royal mortise lock
Latch bolt retracted by key outside and inside lever when outside lever is locked. Outside lever retracts latch bolt unless outside lever is locked by operating toggle button. Outside lever is locked and unlocked by toggle button. Key outside locks outside lever only. When latch bolt is retracted by inside lever, outside lever remains locked. Auxiliary latch deadlocks latch bolt when door is closed. Inside lever is always free for immediate exit.
Features
- For Doors - 1-3/4" thick
- Backset - 2-3/4"
- Lockcase - Heavy gauge zinc chromate steel
- Front - Heavy gauge steel 8" x 1-1/4" x 3/32". Accommodates flat doors & doors beveled 1/8" in 2".
- Armored Front - Wrought brass attached by machine screws to lockcase front
- Deadbolt - 1" throw, brass, chrome plated with hardened steel rollers
- Latchbolt - Brass, chrome plated with heavy-duty deadbolt
- Guardbolt - Extruded brass, chrome plated
- Stopworks - Rocker type, brass, chrome plated
- Strike - Brass, non-handed curved strike 4-7/8" x 1 1/4". Curved-up strike available upon request
- Handing - Handed. Easily field-reversible
- UL Listing - UL Listed “A” Label (3 hours), for use on fire doors, single or pair of doors. “F” mark stamped on strike
- ANSI/BHMA - Meets ANSI/BHMA A156.13, Series 1000, Operational & Security Grade 1 Standards. Lock body conforms to Federal Specification Type 86; and all dimensional and operational performances, Exceeds 1,000,000 cycles.
- Escutcheon Dimension - 2 ½" W x 8 ¼" H x ½" T
Description
- BHMA Certified Lifetime Warranty, GRADE 1
- Conforms to federal specification type 86; and to all dimensional and operational performances of ANSI A156.13-1 80, Series 1000, Extra Heavy Duty
- UL listed 3-hour rating, conforms to standards UL10C and UBC 7-2-1997
- Optional Interchangeable Core
- Rust-proof heavy duty 2 ¾" backset lock case
- Individual spring to prevent lever sag, easily reversible
- Forged brass lever handles exceed requirements of ADA (American Disability Act)
- Auxiliary latch bolt
- Armored front plate conceals lock mounting screws
- 1" throw heavy duty deadbolt with anti-saw hardened pins
- Heavy duty ¾" latch bolt with anti-friction latch, easily reversible
- Optional Electrified Locks available
- Conforms & Meets ADA Regulations
Useful Links
- Template - NM8453 Wood or Composite Doors Escutcheon Trim
- Template - NM Series LFP
- Template - Instruction for New NM series How to Change handing
- NM Series Catalog
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Manufacturer Resources
Product Specs
- Product Group:
- Mechanical Locks
- ANSI/BHMA:
- Meets ANSI/BHMA A156.13, Series 1000, Operational & Security Grade 1 Standards Lock body conforms to Federal Specification Type 86, and all dimensional and operational performances, Exceeds 1,000,000 cycles
- UL Listing Type:
- UL Listed "A" Label (3 hours), for use on fire doors, single or pair of doors. "F" mark stamped on strike
- Grade:
- Grade 1
- Product Subgroup:
- Mortise Locks and Trim
- Product Type:
- Mortise Locks
- Subcategory:
- Mortise Lockset
- Latch Throw:
- 1" (deadbolt)
- Commercial/Residential:
- Commercial
- Cylinder and Keyways:
- 6-Pin solid brass "C" Keyway Standard
- Lock Type:
- Mortise
- Lock Function:
- Entrance
- Keyed:
- Yes
- Product Attribute:
- Mortise Locks
- Electronic:
- No
- Tags:
- cal royal mortise lock, nm8453
- Product Model:
- NM8453
- Product Function:
- Entrance/Office
- Door Hand Direction:
- Field Reversible
- Door Thickness Range:
- 1-3/4"
- Door Strike:
- Brass, non-handed curved Strike 4-7/8" x 1 1/4". Curved-up Strike available upon request
- Product Category:
- Mechanical Locks
- Product Substrate:
- Steel
- Backset (Distance):
- 2-3/4"
Cal-Royal NM8453 – Frequently Asked Questions
1) What type of door is this lockset designed for?
This Grade 1 entrance mortise lockset is designed for heavy-duty commercial applications on wood and metal doors. Standard door thickness is 1-3/4" with provisions for doors up to 2-1/4" thick. Verify your door preparation meets ANSI A115.1 standards.
2) How do I determine the correct handing for this lockset?
Stand on the outside of the door where the key is used. If hinges are on your right, order RH (right hand). If hinges are on your left, order LH (left hand). The NM8453 is field reversible for function changes.
3) What finish options are available for the NM8453?
Common finishes include satin chrome, polished brass, oil-rubbed bronze, and satin stainless steel. Finish availability may vary by function. Contact us to confirm specific finish options for your required function.
4) What does Grade 1 certification mean for this lockset?
Grade 1 is the highest ANSI/BHMA security and durability rating. This lockset withstands 800,000 operational cycles and meets commercial security standards. It provides maximum resistance to forced entry and heavy-use environments.
5) Is this lockset compatible with access control systems?
The NM8453 can integrate with electric strikes and electromagnetic locks for access control applications. Verify compatibility with your specific access control hardware. Some functions may require additional components for full integration.
6) What building codes does this lockset meet?
This lockset meets ANSI A156.13 Grade 1 standards and ADA compliance requirements. It's suitable for commercial applications requiring code-compliant hardware. Verify local fire and building code requirements for your specific application.
7) What keying options are available?
The NM8453 accepts standard 6-pin IC cores for master keying systems. It can be keyed alike, keyed different, or integrated into existing master key systems. Consult your locksmith for proper core selection and keying requirements.
8) How do I install this mortise lockset?
Installation requires mortising the door edge for the lock body and face plate. Use Cal-Royal's installation template for precise measurements. Standard backset is 2-3/4". Professional installation recommended for proper alignment and function.
9) What maintenance does this lockset require?
Regular lubrication of moving parts with graphite or light machine oil extends life. Check door alignment periodically to prevent binding. Clean exterior surfaces with mild soap and water. Avoid harsh chemicals that may damage finishes.
10) Are replacement parts available for the NM8453?
Yes, Cal-Royal provides replacement parts including cylinders, trim pieces, and internal mechanisms. Most service parts are available through authorized Cal-Royal dealers. Keep model and function numbers for accurate part identification.
11) What other models in the NM series should I consider?
The Cal-Royal NM series offers various functions including classroom, storeroom, and office functions. All share the same Grade 1 construction and finish options. Select the function that matches your specific security and access requirements.
12) What are the critical measurements for door preparation?
Standard preparation requires a 1" x 8" mortise in the door edge, 2-1/8" holes for cylinders, and proper strike preparation in the frame. Door thickness must be 1-3/4" minimum. Always verify measurements against Cal-Royal's installation template before cutting.
How fast can I get the Cal-Royal NM8453 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 Cal-Royal NM8453 come with a warranty?
Absolutely. The Cal-Royal NM8453 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 Cal-Royal NM8453?
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 Cal-Royal NM8453 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.