Arrow MK12 Storeroom Function ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$164.00
$135.45
Arrow Arrow MK12 Storeroom Function - Grade 2 Keyed Cylindrical Knob Lock AR-MK12

Arrow MK12 Storeroom Function - Grade 2 Keyed Cylindrical Knob Lock

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Model: MK12-BD-26D
$164.00
$135.45
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Selected Knob Design is
Selected Cylinder is

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

$164.00
$135.45
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ARROW MK Series Cylindrical Locksets

Arrow MK Series offer the designer, architect and contractor simple solutions to accessibility
requirements. Their clean designs, architectural finishes and available functions make them ideal for commercial applications where heavy duty grade one hardware may not be necessary.

All Arrow MK Series locks are U.L. and c.U.L. listed for use on 3 hour, A label or lesser doors and are certified to conform to the requirements of ANSI/BHMA A156.2, Series 4000, Grade 2.
• Federal Specification FF-H-106C


Standard features

  • Lock Chassis: Cold rolled steel with zinc dichromate finish for corrosion resistance. Requires standard 2-1/8" (53.97mm) bore through door.
  • Door thickness: Fits 1-3/8" (34.93mm) to 1-3/4" (44.45mm) doors standard.
  • Backset: 2-3/8" (60.32mm) standard. 2-3/4" (69.85mm), 3-3/4" (95.25mm) and 5" (127mm) available.
  • Latch: Brass with 1/2" (12.7mm) throw. Latch housing is steel, with zinc dichromate finish for corrosion resistance. 7/8" (22.225mm) bore in edge of door is required.
  • Latch Front: Brass, bronze or stainless steel. Standard faceplate for 2-3/8" (60.32.mm) backset measures 2-1/4" (57.15mm) x 1" (25.40mm) with a flat front, for 2-3/4" (69.85mm) backset standard faceplate measures 2-1/4" (57.15mm) x 1-1/8" (28.57mm) with beveled front 1/8" (3.17mm) in 2" (50.8mm).
  • Strike: Brass, bronze or stainless steel. Standard “T" strike measures 2-3/4" (69.85mm) x 1-1/8" (28.57mm). Optional ANSI A115.1 strike measures 4-7/8" (123.82mm) x 1-1/4"(31.75mm). All strikes have a 1-1/4" (31.75mm) lip to center dimension.
  • Cylinder, Standard: - Solid brass 6 pin cylinder with Arrow “A" keyway, keyed to 5 pin for stock. Can be masterkeyed, grandmaster keyed and construction masterkeyed. Conventional cylinders are also available in a variety of competitive manufacturer's keyways. Supplied with two 5 pin brass keys for stock. Available in Schlage CS keyway and other competitive keyways.
  • Handing: Reversible

DOWNLOADS and RESOURCES

MK Series Cut Sheet


Manufacturer Resources

Product Specs

Subcategory:
Cylindrical Locks
Product Group:
Mechanical Locks
Series:
MK Series
Grade:
Grade 2
Keyed Function:
Single Cylinder
Warranty:
1 Year
Standard Latch:
114: Deadlatch; 2-3/4" Backset
Standard Strike:
300: T-Strike, 2-3/4" x 1-1/8"
ANSI/BHMA:
BHMA A156.2, Series 4000, Grade 2, UL Listed
Product Subgroup:
Bored Locksets
Product Type:
Knobsets
Keyed:
Yes
Latch Throw:
1/2"
Fasteners:
Wood and Machine Screws
Commercial/Residential:
Commercial
Latch Faceplate:
1" x 2-1/4"
Rose Diameter:
2-9/16"
Function Description:
Dead locking latch bolt operated by key in outside knob or by operating inside knob. Outside knob is always inoperable.
Lock Type:
Cylindrical
Handle Type:
Knob
UL Listing Type:
BHMA A156.2, Series 4000, Grade 2, UL Listed (3 Hour Fire Rating)
Lock Function:
Storeroom
Product Attribute:
Cylindrical Locks
Product Model:
MK12
Product Function:
Storeroom
Door Hand Direction:
Reversible
Door Thickness Range:
1-3/8" to 1-3/4"
Product Category:
Mechanical Locks

Arrow MK12-BD-26D – Frequently Asked Questions

1) What is the storeroom function on this Arrow MK12 lock?
Storeroom function means the outside knob is always locked and requires a key to operate. The inside knob is always unlocked for free egress. Commonly used for storage rooms, closets, and restricted access areas.
2) What door thickness does this MK12 knob lock fit?
Standard Arrow cylindrical locks typically fit doors from 1-3/8" to 1-3/4" thick. Check your door thickness before ordering. Some models accommodate up to 2-1/4" doors with extended components.
3) Is this lock handed or reversible?
Arrow cylindrical knob locks are typically reversible for left or right hand doors. The latch can be field-reversed during installation. Verify swing direction and order appropriate strike plate.
4) What grade rating does this Arrow lock meet?
This is specified as Grade 2 commercial duty. Grade 2 locks meet ANSI/BHMA standards for moderate commercial use. They offer greater durability than residential Grade 3 but less than heavy-duty Grade 1.
5) What backset does this lock require?
Most Arrow cylindrical locks use 2-3/8" backset as standard. Some models offer adjustable backset for 2-3/8" or 2-3/4". Measure from door edge to center of existing bore hole to confirm.
6) Does this come keyed alike or differently?
This is listed as keyed cylindrical lock. Multiple units may come keyed differently unless specifically ordered keyed alike. Contact us for keying options including master key systems.
7) What bore hole size is required for installation?
Standard cylindrical locks require 2-1/8" diameter bore hole through the door face and 1" cross bore for the latch. Use Arrow's installation template for precise hole placement.
8) Can this lock be rekeyed in the field?
Yes, Arrow cylindrical locks typically use removable cylinders that can be rekeyed by qualified locksmiths. This allows key changes without replacing the entire lock body.
9) What type of strike plate is included?
Standard cylindrical locks include basic strike plate and box. For enhanced security or door alignment issues, consider upgrading to reinforced strike plates with longer screws.
10) How do you adjust the latch on this lock?
The latch typically has a reversible design for handing. Remove latch from door, flip the latch face, and reinstall. Some models have spring-loaded latches that self-adjust during installation.
11) What other Arrow MK series functions are available?
Arrow offers the MK series in multiple functions including passage, privacy, classroom, and entrance. Browse our Arrow lock collection for compatible models and functions.
How fast can I get the Arrow MK12-BD-26D 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 Arrow MK12-BD-26D come with a warranty?
Absolutely. The Arrow MK12-BD-26D 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 Arrow MK12-BD-26D?
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 Arrow MK12-BD-26D 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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