Lockey 3210 Marine Grade Mecha...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$341.98
$323.91
Lockey 3210 Marine Grade Mechanical Keyless Deadbolt Lock with Oversized Knobs - exterior and interior sides shown, marine grade finish

Lockey 3210 Marine Grade Mechanical Keyless Digital Combination Deadbolt Lock with Oversized Knobs

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Model: 3210-MG-SC

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

$341.98
$323.91
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Lockey Marine Grade Mechanical Keyless Digital Combination Deadbolt Lock with Oversized Knobs

Professional Keyless Entry Solution for Commercial Applications

The Lockey Marine Grade Mechanical Keyless Digital Combination Deadbolt Lock delivers reliable keyless entry with zinc-plated steel construction and Teflon coated stainless steel interior components. Designed for door thickness from 1-1/8" to 2" with adjustable backset deadbolt, this lock covers standard 2-1/8" holes and features reversible handing for versatile installation. The marine grade finish provides weather resistance for both exterior and interior applications.

Professional Features & Benefits

  • Keyless Digital Combination: Single user code operation eliminates key management while providing secure access control for authorized personnel.
  • Marine Grade Construction: Zinc-plated steel with Teflon coated stainless steel interior components delivers exceptional corrosion resistance and durability.
  • Versatile Door Compatibility: Accommodates door thickness from 1-1/8" to 2" standard, expandable up to 5" with Extension Kit for various applications.
  • Standard Hole Coverage: Covers standard 2-1/8" holes with total coverage dimensions of 6-3/4" L x 2-1/4" W x 2-1/8" D including trim plates.
  • Reversible Handing: Field-reversible design allows installation on both left and right-handed doors without additional hardware.
  • Adjustable Backset: Deadbolt backset adjustment provides compatibility with various door preparations and frame configurations.
  • Weather Resistant Design: Marine grade finish and weather-resistant construction suitable for both exterior and interior installations.
  • Oversized Knob Design: Large knobs on both exterior and interior sides provide comfortable operation and enhanced grip for all users.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Door Thickness Range: 1-1/8" to 2"
  • Lock Function: Deadbolt
  • MAO Policy: Yes
  • Product Category: Mechanical Locks
  • Product Dimension: 6 5/16" L x 1 3/4" W x 2" D
  • Product Finish: Marine Grade
  • Product Function: Deadbolt
  • Product Group: Mechanical Locks
  • Product Subgroup: Bored Locksets
  • Product Substrate: Zinc-Plated Steel
  • Product Type: Deadbolts
  • Subcategory: Mechanical Push Buttons

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Weatherized Construction

The marine grade finish and weather-resistant design make this deadbolt suitable for exterior installations where exposure to moisture and environmental conditions is a concern. The zinc-plated steel construction with Teflon coated stainless steel interior components provides long-term corrosion resistance in demanding outdoor applications.

Why Choose Lockey Quality?

Lockey mechanical keyless locks deliver professional-grade reliability with zinc-plated steel construction and Teflon coated stainless steel interior components engineered for demanding commercial applications. The marine grade finish provides superior weather resistance while the mechanical operation eliminates battery maintenance requirements. Engineered for demanding commercial applications where dependable keyless access control is essential.

Manufacturer Resources

Lockey USA Lock Catalog

Product Specs

Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Deadbolts
Subcategory:
Mechanical Push Buttons
Commercial/Residential:
Commercial
Lock Function:
Deadbolt
MAP Policy:
Yes
Product Function:
Deadbolt
Product Finish:
Marine Grade
Door Thickness Range:
1-1/8" to 2"
Product Dimension:
6 5/16" L x 1 3/4" W x 2" D
Product Category:
Mechanical Locks
Product Substrate:
Zinc-Plated Steel
Department:
Door Hardware

Lockey 3210-MG-SC – Frequently Asked Questions

1) Will the Lockey 3210 keyless deadbolt fit a 1-3/8 inch wood door and a 2 inch metal door?
Both are inside range. The Lockey 3210 mechanical keyless deadbolt is built for doors 1-1/8 to 2 inches thick, which covers the 1-3/8 inch older interior doors and the 1-3/4 inch commercial standard as well as heavier 2 inch slabs. Past 2 inches you need the Extension Kit, which takes it up to 5 inches. It also has an adjustable deadbolt backset, so you are not locked to one door prep.
2) Can the Lockey 3210 mount over an existing deadbolt hole, or does the door need new prep?
It covers a standard 2-1/8 inch cross bore, so a door already prepped for a tubular deadbolt takes it without redrilling the face. Total coverage with the trim plates is 6-3/4 inches L x 2-1/4 inches W x 2-1/8 inches D, so it hides the old bore and any minor scarring around it. The lock body itself measures 6 5/16 inches L x 1 3/4 inches W x 2 inches D.
3) Do I have to order the Lockey 3210 handed for a left or right hand door?
No handing to specify. The 3210 is field reversible, so the same lock goes on a left or right hand door with no extra parts and no separate part number. For a property manager buying several at once, that means one item covers every opening in the building regardless of swing.
4) What is the difference between Single Combination and Double Combination on the Lockey 3210?
Two orderable versions. Single Combination gives you one user code for everyone who needs in. Double Combination gives you two independent codes on the same lock, which is how you separate groups without keys, say a maintenance crew code and a tenant code. Pick that at the point of order, because it is the lock body, not a setting you switch later.
5) Is there a keyless deadbolt that works outdoors without batteries?
That is what the Lockey 3210 is for. It is a mechanical push button lock, so there is no battery, no wiring, and nothing to replace on a schedule. The finish is marine grade over zinc plated steel with Teflon coated stainless interior components, which is why Lockey rates it for exterior gates and doors as well as interior ones. On a remote opening with no power, this is the type to use rather than an electronic deadbolt like the Codelocks CL2200 or the Delaney KP400.
6) Can I replace a standard single cylinder deadbolt with the Lockey 3210 and reuse the door?
In most cases yes, on the door face. The 3210 fits the same 2-1/8 inch cross bore a tubular deadbolt such as the Arrow DBX61 or the Bravura 310B uses, and its backset is adjustable so it suits either of the two common backsets. What changes is the exterior side: you lose the keyway entirely and go to a push button code, so anyone holding a key to that door needs to be given the combination instead.
7) Which deadbolt should I use if the door is thicker than 2 inches?
The Lockey 3210 covers 1-1/8 inch to 2 inch doors as standard and goes up to 5 inches with the Extension Kit, so thick doors stay in range with the kit added. If you would rather stay keyed on a thick door, the Corbin Russwin DL3011 is a Grade 1 cylindrical deadlock rated for 1-3/4 inch to 2-1/4 inch doors. Most of the keyed deadbolts in this class stop short of that - the Dexter DB2000 is listed for 1-3/8 inch to 1-3/4 inch and the Hager 3115 for 1-3/8 inch to 1-3/4 inch.
8) What keyless deadbolt works on an exterior gate or wet location where a keyed deadbolt keeps seizing up?
The Lockey 3210 is the mechanical keyless option built for that exposure: it is a marine grade finish over zinc-plated steel, with no batteries and no key cylinder to corrode or freeze. Keyed alternatives in the same deadbolt family all rely on a cylinder in the exterior face - the Hager 3215 is a single cylinder Grade 2 deadbolt with a 1 inch throw, and the Dexter DB1000 single cylinder is a Grade 1 cylinder x thumbturn deadbolt. Both are excellent interior-door hardware but put a keyway into weather. The 3210 uses push-button combination entry on the outside face instead.
9) What is the closest keyless combination deadbolt to the Lockey 3210?
Within the mechanical push-button deadbolt group, the Codelocks CL200 is the nearest peer: it is a light duty surface deadbolt with key override in the CL200 Series. The difference that decides the job is mounting - the CL200 mounts on the surface of the door, while the Lockey 3210 goes through a standard 2-1/8 inch bore and covers it with trim, using an adjustable-backset deadbolt. If the door is already bored for a deadbolt, the 3210 fits that prep; if you are working on a door you do not want to bore, the surface-mounted CL200 is the one that suits.
10) I need code entry but the facility standard is an ANSI Grade 1 deadbolt on that opening. What do I specify?
The Lockey 3210 is a mechanical keyless deadbolt in commercial marine grade construction, and the combination is what opens it - there is no cylinder to key into a master system. Where a written Grade 1 deadbolt is the requirement, the Grade 1 peers to specify are the Accentra D111 single cylinder deadbolt with a 2-3/8 inch backset, the Falcon D111 Grade 1 classroom deadbolt with adjustable backset in heavy duty, or the Design Hardware D1 Series Grade 1 double cylinder for 1-3/4 inch doors in extra heavy duty. Those are keyed; the 3210 is the choice when you want to stop issuing keys at that door.
11) Our doors are keyed to an SFIC system. Can I standardize on the Lockey 3210?
The Lockey 3210 takes no core - it is a mechanical combination deadbolt, so it sits outside any keying system rather than joining it. To keep an opening on the existing core program, the Arrow E61 26D IC is a Grade 2 single cylinder deadlock with SFIC prep, less core, for 1-3/8 inch to 1-3/4 inch doors, and the Deltana CL200LAIC is a Grade 2 interchangeable core single deadbolt with a 2-3/4 inch backset. A common pattern is keyed IC deadbolts on the interior program and the 3210 on the outbuilding or gate where key control is the problem you are trying to remove.
12) The opening needs a fire rated deadbolt. What are my options?
For a fire rated opening, specify from the peers that carry the rating: the Hager 3115 Grade 2 cylinder by thumbturn and the Hager 3118 Grade 1 classroom deadbolt are both fire rated for 1-3/8 inch to 1-3/4 inch doors with a Schlage C keyway, and the Cal-Royal CRB800 is a Grade 1 heavy duty single cylinder deadbolt with a UL 3-hour fire rated latch. The Lockey 3210 is the keyless mechanical choice for exterior and non-rated commercial openings such as gates, yards and storage buildings.
13) Should I use a mechanical keyless deadbolt or a keyed deadbolt for a shared commercial door?
It comes down to who holds what. A keyed deadbolt like the Hager 3215 or the Dexter DB2000 means issuing and recovering keys every time staff turn over. The Lockey 3210 uses a push button code instead, so a turnover is a code change, not a rekey and not a new key run. The trade off is that there is no key override on the 3210, so nobody is getting in on a key if the code is forgotten. If you want code entry with a key as backup, the Codelocks CL200 surface deadbolt is a mechanical code lock with key override.
14) Is the Lockey 3210 rated for commercial use or is it a residential lock?
Lockey lists the 3210 as commercial. It is a keyless deadbolt function, zinc plated steel bodied, and Lockey names office buildings, schools, healthcare, retail, warehouses, multi-tenant residential, and municipal buildings as its applications. Note it is a deadbolt only, so on an opening that also needs a latch to keep the door closed you are pairing it with a separate latchset or passage set.
15) Will a keyless mechanical deadbolt hold up on a gate or exterior door exposed to salt air and rain?
That is the reason for the marine grade build on the 3210. Zinc plated steel outside, Teflon coated stainless steel components inside, and a marine grade finish, which is what Lockey specifies for exterior service where moisture is a factor. The keyed deadbolts in the same category are generally interior duty finishes; if corrosion is your problem, this is the one built for it.
16) Is an electronic keypad deadbolt the same thing as the Lockey 3210?
No - they share the keypad and differ in what powers it. The Lockey 3210 is mechanical: the push-button combination drives the bolt directly, so there are no batteries. The electronic keypad deadbolts are a separate class: the Codelocks CL2200 is a medium duty electronic surface deadbolt in brushed steel, the Delaney KP400 is a Grade 2 electronic deadbolt with a programmable remote, and the Dormakaba Saffire LX-D is an RFID electronic deadbolt with BLE and electronic lock override. Choose those when you want credentials, remotes or audit-capable access; choose the 3210 when the door needs to keep working with no power source at all.
17) I need to get out without a key but do not want anyone entering from outside. Is the Lockey 3210 right?
The Lockey 3210 is a two-sided deadbolt with an oversized knob inside and a combination keypad outside, so it is for openings where you do want controlled entry from the exterior. If the requirement is exit only with no outside operation, the Arrow E60 is the fit - a Grade 2 exit deadlock, non-keyed, blank plate by thumbturn for 1-3/8 inch to 1-3/4 inch doors. The Callan 205S is another route: a Grade 3 one-sided half-bore deadbolt, which needs only a partial bore since there is nothing on the far face.
18) What deadbolt do I use on a thick door if I want a keyed lock instead of a combination?
For 1-3/8 inch to 2 inch doors the Deltana 7312KA2 is a Grade 3 double cylinder deadbolt in heavy duty KA2 keying, which brackets nearly the same thickness range the Lockey 3210 covers at 1-1/8 inch to 2 inch. The difference is operation: the 7312KA2 needs a key on both faces, while the 3210 is combination outside and knob inside with reversible handing, so one part number works on either hand of door.
19) I need a latch and a deadbolt on one door. Does the Lockey 3210 cover that?
The Lockey 3210 is deadbolt only - it throws a bolt and has no latching function, so the door still needs a knob or lever set to keep it closed. Where you want both in one assembly, the Falcon H2101 is a Grade 2 entrance interconnected lock with a single cylinder deadbolt, and the Codelocks CL160 is a light duty mortise latch with QuickCode entry. On a job where the existing latchset stays and only the deadbolt is being upgraded to keyless, the 3210 is the piece that changes.
20) Can I get a keypad deadbolt with a second code for a separate group of users?
The Lockey 3210 comes in Single Combination and Double Combination, so the Double Combination is the one to order when two codes are needed at the same door - for instance one for tenants and one for a service crew. Among the keyed comparables, that split is normally handled by keying instead, as with the Deltana 7312KA2 in KA2 keying. The combination approach avoids issuing anything physical.
21) Is there a keyed deadbolt with an adjustable backset like the Lockey 3210 has?
Yes. The Lockey 3210 uses an adjustable backset deadbolt so one part covers varying door preps. On the keyed side, the Cal-Royal ED500 is a Grade 3 single cylinder deadbolt with adjustable backset for 1-3/8 inch to 1-3/4 inch doors, the Falcon D111 is a Grade 1 heavy duty classroom deadbolt with adjustable backset, and the Brinks Raleigh E2401 is a single cylinder deadbolt with a 4-way adjustable backset. Fixed-backset peers such as the Accentra D111 at 2-3/8 inch require you to confirm the existing bore first.
22) What should I put on an ADA-sensitive opening instead of a combination keypad?
The Lockey 3210 uses oversized knobs on both faces for easier grip, with a push-button combination on the exterior. Where an ergonomic turn piece is what the opening calls for, the Cal-Royal LSD is a Grade 3 single cylinder deadbolt with an ADA ergonomic thumbturn for 1-3/8 inch to 1-3/4 inch doors. The two solve different halves of the problem - the LSD addresses the turn action, the 3210 removes the key from the exterior side.
23) Is the Codelocks CL200 or the Lockey 3210 the better match for a high-cycle commercial door?
Both are mechanical keyless deadbolts. The CL200 is rated light duty in the CL200 Series and includes a key override. The Lockey 3210 is built for commercial use with zinc-plated steel and Teflon coated stainless steel interior components in a marine grade finish, and operates purely on the combination. For a door in constant traffic and weather, the 3210 body is the more robust construction; for an interior door where a key override is required as a fallback, the CL200 provides that path.
24) Is the Lockey 3210 knob easy to operate for older residents or someone carrying a load?
The knobs are oversized on both the exterior and interior faces, which gives a bigger grip surface than a standard deadbolt thumbturn. Entry is push button code then turn the knob, so there is no key to line up in the dark. If you specifically need an ergonomic thumbturn on a keyed deadbolt instead, the Cal-Royal LSD is the ADA ergonomic thumbturn version in the same category.
How fast can I get the Lockey 3210-MG-SC 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 Lockey 3210-MG-SC come with a warranty?
Absolutely. The Lockey 3210-MG-SC 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 Lockey 3210-MG-SC?
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 Lockey 3210-MG-SC 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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