Marks USA Grade 1 Mortise Loc...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$341.00
$149.43
Marks USA Marks USA Grade 1 Mortise Lock - Body Only MRK-5

Marks USA Grade 1 Mortise Lock - Body Only

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Model: MRK-5
Selected Keying is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$341.00
$149.43
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Free Keying on all locks
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  • Meets ANSI GRADE 1 specification: ANSI-A156.13
  • Underwriters Laboratories 3-Hour Fire Rating
  • BHMA Certified
  • Lifetime Mechanical Warranty
  • Available in 2-1/2" and 2-3/4" backset
  • Stainless Steel Bolts, Latches, Independent Lever Support Springs (on lever sets)
  • Made in our plant in Amityville, New York, USA

Manufacturer Resources

Product Specs

Series:
195 Series
Features:
Lever Support Springs With 5/16" Hubs
Grade:
Grade 1
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Mortise Locks
Subcategory:
Cylindrical Locks
ANSI/BHMA:
ANSI/BHMA, UL Listed
Commercial/Residential:
Commercial
Latch Throw:
3/4"
Front Size:
1-1/4" x 8"
Hub Material:
Steel
ANSI Function:
F01
Product Attribute:
Mortise Locks
Electronic:
No
Strike Classification:
4-7/8"
Product Category:
Mechanical Locks
Backset (Distance):
2-3/4"

Marks USA MRK-5 – Frequently Asked Questions

1) What is included with this Marks USA Grade 1 mortise lock body?
This is a lock body only. No cylinders, handles, trim, or installation hardware included. You'll need to purchase cylinders and trim separately to complete the lock assembly.
2) What door thickness does this mortise lock body accommodate?
Standard mortise lock bodies typically fit doors 1-3/8" to 2-1/4" thick. Verify your specific door thickness and check the manufacturer template for exact requirements before installation.
3) Is this lock body reversible for different door swings?
Yes, mortise lock bodies are typically field-reversible for left or right-hand doors. The latch and deadbolt can be adjusted during installation to match your door configuration.
4) What cylinder type does this lock body require?
This accepts standard mortise cylinders with threaded cam. Common options include 1-1/8" and 1-1/4" mortise cylinders. Choose cylinders based on your keying requirements and security needs.
5) What makes this a Grade 1 lock body?
Grade 1 represents the highest ANSI/BHMA performance standard. These lock bodies offer superior durability, security, and cycle life compared to Grade 2 or 3 locks. Built for heavy commercial use.
6) Does this meet fire door requirements?
Many Marks USA mortise locks are suitable for fire-rated doors when properly installed. Verify the specific model meets your local fire code requirements and use appropriate fire-rated trim components.
7) What trim styles are compatible with this lock body?
This accepts standard mortise trim with 2-1/2" centers between handle and thumbturn/cylinder holes. Compatible with lever handles, knobs, and various escutcheon styles from the Marks USA trim line.
8) How do I prepare the door for installation?
Use the manufacturer's drilling template for precise mortise cavity dimensions. Requires mortising the door edge and face boring for trim components. Professional installation recommended for proper fit and function.
9) Can this lock body be rekeyed after installation?
Yes, by replacing or rekeying the mortise cylinder. The lock body itself doesn't require changes for rekeying. Work with a qualified locksmith for cylinder service and key management.
10) How do I adjust the latch and deadbolt projection?
Most Marks mortise lock bodies have adjustable latch projection and deadbolt throw. Follow manufacturer instructions for proper adjustment to ensure secure door closure and locking function.
11) Are there other Marks USA mortise lock options available?
Yes, Marks USA offers various mortise lock functions including classroom, storeroom, passage, and privacy configurations. Browse our Marks USA selection for complete lock sets and trim options.
12) What backset does this mortise lock body use?
Standard mortise locks typically use 2-3/4" backset from door edge to center of trim holes. Verify your door preparation matches this dimension before installation for proper alignment.
How fast can I get the Marks USA MRK-5 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 Marks USA MRK-5 come with a warranty?
Absolutely. The Marks USA MRK-5 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 Marks USA MRK-5?
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 Marks USA MRK-5 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.
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