Design Hardware D1 Series - G...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$207.20
$167.14

Design Hardware D1 Series - Grade 1 Double Cylinder Deadbolt Lock

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Model: D1-D-26D
$207.20
$167.14
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$207.20
$167.14
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Free Keying on all locks
DESIGN HARDWARE  D2 SERIES DEADBOLT LOCKS
 

Specifications:

ANSI: Meets & Exceeds ANSI - A 156.2, Grade 1 Standards
UL Listings:
UL Listed for "A" Label 3 Hour Fire Doors
ADA Compliance:
2” ADA Thumbturn Meets ADA & ANSI A117. 1 accessibility codes
Lock Chassis:
Steel, Zinc dichromated for corrosion resistance
Trim:
Free spinning cylinder collar resists wrenching and prying
Handing:
Non-handed - Completely reversible
Backset & Latchface:
2 3/4” fixed backset std. with 1-1/8” x 2-1/4” latchface, 2-3/4” backset available with 1” x 2-1/4” latchface both with self adjusting front for square or beveled doors
Latchbolt:
Grade 1 Solid Brass with 1” Throw & Anti-Saw Hardened Steel Pin Insert
Cylinder Options:
6 Pin Brass, C Kwy, with 2 Keys std, Prepared for Small format IC core (less core)
Strike:
1-1/8” x 2-3/4” Square corner
Door Preparation:
ANSI A115.2 - 2 1/8” crossbore
Door Thickness:
1-3/4” thick doors
Standard Finishes:
US3 PVD*, US4, US10B, US15, US26 PVD*, US26D (PVD = Lifetime Finish)
Fasteners:
Combination screws for wood or metal doors & frames
Warranty:
Limited lifetime warranty

 

RESOURCES & DOWNLOADS

Installation Instruction

Functions

Manufacturer Resources

Product Specs

Series:
D1 Series
Features:
Free Spinning Cylinder Collar Resists Wrenching and Prying
ANSI/BHMA:
Grade 1 - ANSI A156.4, UL Listed. Meets & Exceeds ANSI - A 156.2 Standards, UL Listed for "A" Label 3 Hour Fire Doors, Meets ADA & ANSI A117
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Deadbolts
Subcategory:
Deadbolts
Keyed Function:
Single Cylinder
Commercial/Residential:
Commercial
Cylinder and Keyways:
Conventional, Schlage C Keyway
Keyed:
Yes
Lock Function:
Deadbolt
Package Includes:
(2) Standard Keys, Combination Screws for Wood or Metal Doors & Frames
Grade:
Grade 1
Duty Level:
Extra Heavy Duty
Standard Strike:
1-1/8" x 2-3/4", Square Corner
Product Function:
Double Cylinder
Door Thickness Range:
1-3/4"
Product Substrate:
Brass
Product Category:
Mechanical Locks
Backset (Distance):
2-3/4"
Department:
Door Hardware

Design Hardware D1-D-26D – Frequently Asked Questions

1) Will the Design Hardware D1 Series deadbolt fit a 1-3/8 inch door?
No. The D1 Series deadbolt is built for 1-3/4 inch doors only, which is the standard commercial thickness. If you're working an older 1-3/8 inch interior or residential door, look at something with a thickness range instead: the Dexter DB1000 Series Grade 1 deadbolt covers 1-3/8 to 1-7/8 inches, and the Hager 3214 Grade 2 double cylinder covers 1-3/8 to 1-3/4 inches.
2) Can I drop the D1 deadbolt into the existing bore on my door?
If the door is prepped to ANSI A115.2 with a 2-1/8 inch crossbore and a 2-3/4 inch backset, the D1 goes straight in. The strike is a 1-1/8 x 2-3/4 inch square corner, and the front is self adjusting for square or beveled door edges, so you don't need to specify bevel. Doors bored at 2-3/8 inch backset will need the hole relocated or a different lock.
3) What keyway does the Design Hardware D1 deadbolt come in, and can I key it to my existing system?
Conventional cylinders ship 6 pin brass in Schlage C keyway with two keys. If your building already runs Schlage C, these key into it. You can order keyed different (standard) or keyed alike when you want a run of doors on one key. For a masterkeyed or interchangeable core system, take the SFIC version instead, which is prepped for a small format core and ships less core so you can install your own.
4) What Grade 1 deadbolt is UL fire rated like the Design Hardware D1 Series?
The Design Hardware D1 Series is UL Listed for A Label 3 hour fire doors and meets ANSI A156.2 Grade 1. The Cal-Royal CRB800 is a Grade 1 heavy duty single cylinder deadbolt with a UL 3-hour fire rated latch, the same fire duration in a cylinder x thumbturn arrangement. The Hager 3118 is a Grade 1 classroom deadbolt with a fire rating and a 6-pin Schlage C cylinder, which is the same cylinder pinning and keyway family as the D1 Series conventional option. Both of those are single cylinder; the D1 Series is keyed from both faces.
5) What double cylinder deadbolt should I use on a 1-3/8 inch door?
The Design Hardware D1 Series is dimensioned for 1-3/4 inch doors, so a thinner leaf needs a different bolt. Two double cylinder options reach down to 1-3/8 inch: the Dexter DB2000 Series double cylinder deadbolt, a Grade 2 lock covering 1-3/8 inch to 1-3/4 inch, and the Dexter DB1000 Series double cylinder, a Grade 1 lock covering 1-3/8 inch to 1-7/8 inch. If the door schedule calls for Grade 1 on a thin leaf, the DB1000 is the one that satisfies both.
6) My egress code will not allow a double cylinder deadbolt. What single cylinder Grade 1 deadbolt takes its place?
Double cylinder deadbolts key from both sides, which many jurisdictions prohibit on a required egress door. For a Grade 1 cylinder x thumbturn alternative, the Dexter DB1000 Series single cylinder deadbolt, the Delaney LM Series single cylinder less core deadbolt, the Deltana CL200LM single cylinder deadbolt, the Accentra D111 with 2-3/8 inch backset, and the Falcon D111 classroom deadbolt are all Grade 1 in cylinder x thumbturn function. The Falcon D111 is heavy duty with an adjustable backset; the Accentra D111 covers 1-3/8 inch to 1-3/4 inch doors. Note the Design Hardware D1 Series uses a 2-3/4 inch backset, so if you are matching an existing crossbore, the Accentra D111 at 2-3/8 inch is a different bore centerline.
7) What is the difference between the Design Hardware D1 Series and a Corbin Russwin DL3000 deadlock?
They are not the same class of lock. The Design Hardware D1 Series is a bored deadbolt with a 2-3/4 inch backset for a 2-1/8 inch crossbore, keyed both sides. The Corbin Russwin DL3011 is a Grade 1 cylindrical deadlock in cylinder x blank function, meaning the inside face carries a blank plate rather than a second cylinder or a turn, and it covers 1-3/4 inch to 2-1/4 inch doors. The Corbin Russwin DL3211 is the same cylinder x blank arrangement fixed at 1-3/4 inch. Cylinder x blank gives no operation at all from the protected side, so it suits a stockroom or utility door where nobody should be locking or releasing from inside; it is not a swap for a bolt you need to work from both faces.
8) I need another Schlage C keyway deadbolt to key alike with the Design Hardware D1 Series. What else uses C keyway?
The Design Hardware D1 Series ships with a conventional 6-pin cylinder in Schlage C keyway. Among commercial deadbolts, the Hager 3214 double cylinder deadbolt and the Hager 3215 single cylinder deadbolt are both Grade 2 with Schlage C keyway, the Hager 3115 is a Grade 2 cylinder x thumbturn with Schlage C keyway, and the Hager 3118 is a Grade 1 classroom deadbolt with Schlage C keyway and a 6-pin cylinder. All four cover 1-3/8 inch to 1-3/4 inch doors and are fire rated. Sharing a keyway is what lets a locksmith bring the whole opening set onto one key system.
9) What is a small format interchangeable core alternative to the Design Hardware D1 Series SFIC version?
The Design Hardware D1 Series is offered prepped for a small format IC core less core, in six finishes. If you need another less-core bolt for the same core system, the Arrow E61 is a Grade 2 single cylinder deadlock with SFIC prep less core covering 1-3/8 inch to 1-3/4 inch doors, the Deltana CL200LAIC is a Grade 2 single cylinder interchangeable core deadbolt with a 2-3/4 inch backset, and the Delaney LM Series is a Grade 1 single cylinder less core deadbolt. The Deltana CL200LAIC shares the 2-3/4 inch backset with the D1 Series, so it drops into the same crossbore centerline; all three are single cylinder rather than keyed both sides.
10) Which of these deadbolts looks like a substitute for the Design Hardware D1 Series but is not a bored deadbolt?
Several parts in the deadbolt family will not fit a 2-1/8 inch crossbore at 2-3/4 inch backset the way the Design Hardware D1 Series does. The Dormakaba D900 is a small case mortise deadbolt, the Emtek 2050 and 2051 are European mortise deadbolts with an integrated roller latch, and the Codelocks CL2210 is an electronic mortise deadbolt: all four need a mortise pocket cut into the door edge, not a bore. The International Door Closers DH-1821 is a hook bolt deadlock with a flat faceplate, a different bolt geometry aimed at sliding and swinging applications where a straight throw will not hold. The BEST 8T is a tubular deadbolt tube component and the Baldwin 8BR0618001 is a deadbolt spacer, both parts rather than complete locks. The Arrow 460 is a mortise lock strike, the frame-side piece.
11) What is the difference between the Design Hardware D1 Series and the Falcon D111 or D211 classroom deadbolt?
The Design Hardware D1 Series is a double cylinder deadbolt, keyed from both faces, Grade 1 and extra heavy duty on a 2-3/4 inch backset. The Falcon D111 is a Grade 1 heavy duty classroom deadbolt in cylinder x thumbturn function with an adjustable backset, and the Falcon D211 is the Grade 2 medium duty version of the same single cylinder arrangement. Classroom function means the outside cylinder throws and retracts the bolt while the inside turn always releases it, so an occupant is never key-dependent to get out; a double cylinder bolt requires a key on the inside as well. That distinction drives which one a code official will accept on an occupied room.
12) Do I need to know the handing before ordering a D1 Series deadbolt?
No handing to call out. The D1 is non-handed and completely reversible, so one part number covers left and right hand openings. That's the reason it works as a fleet standard: you stock one lock for every door in the building.
13) Does the SFIC version of the D1 deadbolt include the core?
It does not. SFIC is supplied prepped for a small format interchangeable core, less core, so a locksmith or facility keyshop drops in a core from the existing system. Budget the cores separately. The conventional version, by contrast, arrives keyed with two keys in the box.
14) Is anything else needed to install a D1 Series deadbolt on a hollow metal door?
Combination screws for wood or metal doors and frames come in the box, so the same carton works on a hollow metal frame or a wood door. With the conventional cylinder you also get two keys. What you supply is the door prep if it isn't already there: 2-1/8 inch crossbore at a 2-3/4 inch backset.
15) Is a Grade 1 deadbolt worth it over Grade 2 for an apartment entry door?
Grade 1 is the top ANSI/BHMA tier and the D1 is rated extra heavy duty, with a steel chassis zinc dichromated against corrosion, a hardened steel anti-saw pin in the bolt, and a free spinning cylinder collar that resists wrenching and prying. On a high traffic multi-family entry or a door that has already been attacked, that's what you want. For lower traffic interior or storage doors, a Grade 2 like the Dexter DB2000 double cylinder or the Hager 3214 does the job.
16) Can I key a run of D1 deadbolts alike across a building?
Yes. Keying is specified at order time: keyed different is standard, keyed alike is the option when you want one key to open multiple doors. Since the lock is non-handed, you can put the same part on every opening regardless of swing and keep one key. For a larger facility running masterkeying, the SFIC version lets your keyshop control the cores instead.
17) Is there a lower grade double cylinder deadbolt than the Design Hardware D1 Series?
Yes, at two steps down. The Delaney LU Series double cylinder deadbolt is Grade 2. The Callan Model 210S double cylinder deadbolt and the Deltana 7312KA2 double cylinder deadbolt are both Grade 3, with the Deltana 7312KA2 covering doors from 1-3/8 inch to 2 inch. The Design Hardware D1 Series is Grade 1 and rated extra heavy duty, which is what a door schedule specifying ANSI A156.2 Grade 1 requires; the Grade 2 and Grade 3 bolts above are cataloged against lower cycle and strength thresholds and would not satisfy a Grade 1 call-out.
18) What do I use instead of a keyed deadbolt on an exit-only door?
The Design Hardware D1 Series is keyed on both faces, which is more control than an exit-only opening usually needs. The Arrow E60 is a Grade 2 exit deadlock, non-keyed, in blank plate x thumbturn function, covering 1-3/8 inch to 1-3/4 inch doors: blank on the outside face, turn on the inside, so the door throws and releases only from within. The Callan Model 205S is a Grade 3 one-sided half-bore deadbolt, which takes a half bore rather than a through crossbore. Either avoids issuing keys for a door nobody enters through.
19) Is there an electronic or keypad deadbolt I can use where the Design Hardware D1 Series would go?
If the goal is to stop carrying keys, the alternatives change the lock type. The Delaney KP400 is a Grade 2 electronic deadbolt with a programmable remote. The Codelocks CL2200 is a medium duty electronic surface deadbolt in brushed steel, and the Codelocks CL200 is a light duty surface deadbolt with key override, both surface mounted rather than bored. The Dormakaba Saffire LX-D is an RFID electronic deadbolt with BLE and electronic lock override, and the Dormakaba Nova-D is an RFID multihousing smart electronic deadbolt. None carry the Grade 1 extra heavy duty rating of the Design Hardware D1 Series, so on an opening specified to Grade 1 the mechanical bolt is what meets it.
20) I am standardizing deadbolts across a portfolio. Which deadbolts match the Design Hardware D1 Series 2-3/4 inch backset?
Backset is what decides whether a replacement drops into the existing bore. The Design Hardware D1 Series uses a 2-3/4 inch fixed backset as standard. The Deltana CL200LA single cylinder deadbolt and the Deltana CL200LAIC interchangeable core version are both Grade 2 with a 2-3/4 inch backset. Where existing bores vary across buildings, adjustable-backset bolts cover both centerlines: the Falcon D111 is Grade 1 heavy duty with an adjustable backset, the Cal-Royal ED500 is Grade 3 with an adjustable backset for 1-3/8 inch to 1-3/4 inch doors, and the Brinks Raleigh E2401 and Mendocino E2402 single cylinder deadbolts use a 4-way adjustable backset.
21) What finishes does the D1 Series deadbolt come in?
Six: 605 bright brass, 606 satin brass, 613 oil rubbed bronze, 619 satin nickel, 625 bright chrome, and 626 satin chrome. All six are offered in both the conventional and the SFIC cylinder versions, so choosing interchangeable core doesn't cost you a finish match with the rest of the openings.
22) Is a Grade 2 or Grade 3 single cylinder deadbolt enough for an interior office door?
Below the Design Hardware D1 Series Grade 1 extra heavy duty commercial spec, several single cylinder bolts step down for lighter traffic. The Cal-Royal CB160 is Grade 2 with a tamper-resistant cylinder guard, the Bravura 310B Elite traditional round, 310RC Elite contemporary round, 310SC Elite contemporary square and Rectangle single cylinder deadbolts are all Grade 2 cylinder x thumbturn, and the Callan 200S-G2 is a Grade 2 round trim deadbolt. At Grade 3 there is the Cal-Royal LSD with an ADA ergonomic thumbturn for 1-3/8 inch to 1-3/4 inch doors and the Callan 200S square trim deadbolt. All of those are single cylinder, so they release from inside without a key; the D1 Series is keyed both sides.
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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 Design Hardware D1-D-26D come with a warranty?
Absolutely. The Design Hardware D1-D-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 Design Hardware D1-D-26D?
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