Adams Rite 1870 Series Cylinde...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$152.00
$145.81
Adams Rite 1870 Series Cylinder-Operated Flushbolt with Key Control

Adams Rite 1870 Series Cylinder-Operated Flushbolt with Key Control

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Model: 1870-25-628
$152.00
$145.81
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$152.00
$145.81
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Adams Rite 1870 Series Cylinder-Operated Flushbolt with Key Control

Professional Key-Controlled Flushbolt for Narrow Stile Aluminum Doors

The Adams Rite 1870 Series Cylinder-Operated Flushbolt provides building management with key control of the inactive leaf on paired narrow stile aluminum doors. This professional-grade flushbolt prevents unauthorized locking with a 360° key operation that throws or retracts the hexagonal 3/8" bolt with 11/16" throw. The steel case with corrosion-resistant plating measures 1" x 6" x depth and accepts any standard 1" length mortise cylinder with MS cam.

Professional Features & Benefits

  • Specifically engineered for narrow stile aluminum doors
  • Hollow metal and wood door options available
  • Accepts standard Adams Rite MS® cam mortise cylinders
  • Multiple finish options: US3, US4, US10B, US32, US32D
  • UL Listed models available
  • Compatible with Adams Rite electric strikes for access control
  • An ASSA ABLOY Group brand

Technical Specifications

  • For complete technical specifications, contact Adams Rite at 1-800-626-7590 or visit adamsrite.com.

Installation & Operation

  1. Review manufacturer specifications and verify door preparation requirements including door thickness, stile width, and cylinder backset compatibility (31/32" or 1-1/8") for this flushbolt.
  2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and determine installation position at threshold or header as required.
  3. Prepare door by drilling required holes and routing as specified in manufacturer instructions for the selected backset configuration.
  4. Install flushlock mechanism with actuator arm and attach rod/bolt assembly per manufacturer specifications using provided mounting screws.
  5. Install mortise cylinder (sold separately) such as 4036 Mortise Cylinder or 4066 Thumbturn with MS cam from either or both sides as needed.
  6. Test 360° key operation to verify proper bolt throw and retraction, ensuring key can only be removed when bolt is in positively locked or unlocked position. Refer to manufacturer documentation for complete installation details and troubleshooting.

Professional Applications

  • Commercial Office Buildings with Paired Aluminum Doors
  • Educational Facilities Requiring Controlled Access
  • Healthcare Institutions with Security Protocols
  • Retail Establishments with Narrow Stile Entrances
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Adams Rite Quality?

Adams Rite 1870 Series flushbolts deliver professional-grade reliability with steel construction and corrosion-resistant plating designed for demanding commercial applications. The over-center action mechanism provides the same proven performance as MS pivoted bolt deadlocks with 5 Year warranty coverage. Engineered for narrow stile aluminum door systems where dependable key control and unauthorized access prevention are essential.

Product Specs

Product Group:
Door Trim and Accessories
Series:
1870 Series
Cylinder Included:
No
Warranty:
5 Year
Subcategory:
Flushlocks
Product Subgroup:
Flush Bolts
Commercial/Residential:
Commercial
Cylinder and Keyways:
Mortise Cylinder
Product Model:
1870
Product Dimension:
1" x 6" x depth
Face Plate:
1" x 6 7/8"
Door Strike:
1/2"
Product Category:
Door Trim and Accessories
Department:
Door Hardware
Product Type:
Flush Bolts

Adams Rite 1870-25-628 – Frequently Asked Questions

1) Will the Adams Rite 1870 flushbolt work on a narrow stile aluminum door?
Narrow stile aluminum is exactly what the 1870 cylinder-operated flushbolt is built for. It mortises into the inactive leaf of a pair and is offered in two backsets, 31/32 inch and 1-1/8 inch, which are the two narrow stile preps Adams Rite works to. Hollow metal and wood door versions are also offered. Pick the backset that matches the stile prep you already have, because the two are not interchangeable once the door is routed.
2) Does the Adams Rite 1870 flushbolt come with a cylinder?
No cylinder is included. The 1870 takes any standard 1 inch length mortise cylinder with an Adams Rite MS cam, ordered separately. A 4036 mortise cylinder or a 4066 thumbturn with MS cam will drive it, and you can fit one from either side or both sides depending on whether you want key control from the inside as well.
3) How do I keep tenants or staff from locking the inactive leaf of a pair of aluminum doors?
That is the whole point of a key-operated flushbolt like the Adams Rite 1870. A conventional lever or slide flushbolt can be thrown by anyone who reaches it; the 1870 only moves with a key, so building management controls whether the inactive leaf is secured. The key comes out only when the bolt sits fully locked or fully unlocked, so nobody can leave it parked halfway.
4) How much does the Adams Rite 1870 bolt throw, and what strike does it need?
The 1870 throws a hexagonal 3/8 inch bolt 11/16 inch with a 360 degree turn of the key. The matching door strike is 1/2 inch. If you are dropping this into an existing prep, check that your strike or threshold hole suits a 3/8 inch hex bolt at that throw before you commit.
5) What do I have to specify when ordering an Adams Rite 1870 flushbolt?
Four things decide the part number: backset (31/32 inch or 1-1/8 inch), faceplate shape (flat, bevel, radius, or radius with weatherstrip), finish, and hand. Hand is given as LH or RHR and RH or LHR. Finishes are 313 dark bronze anodized, 335 black anodized, and 628 clear anodized. The mortise cylinder is a separate line on the order.
6) I need a flush bolt for a fire rated pair of doors, is the Adams Rite 1870 the right one?
For a fire rated pair, look at a bolt carrying a stated fire rating instead. ZenSupply stocks the Ives FB41 automatic flush bolt set for wood doors rated 90 minutes, the Ives FB42 top automatic flush bolt for wood doors with auxiliary fire latch, and the ABH 1860P/1862P automatic flush bolt pair, fire rated 3 hour with thermal lock. The Adams Rite 1870 is a cylinder-operated narrow stile aluminum flushbolt and UL Listed models are noted as available, so if you want it on a rated opening you need to confirm the specific UL Listed variant against your door label.
7) What is the difference between the Adams Rite 1870 flushbolt and a manual flush bolt like the Ives FB358?
The 1870 is cylinder-operated: a 360 degree key turn throws or retracts the bolt, and it accepts a standard 1 inch mortise cylinder with MS cam, which is not included. The Ives FB358 is a manual flush bolt with a 3/4 inch throw and 1/2 inch bolt diameter, operated by hand at the lever rather than by key. If building management needs to control who locks the inactive leaf, the key operation on the 1870 is the deciding difference; if the inactive leaf is set by staff at the door, the manual FB358 does the same holding job without a cylinder purchase.
8) I want the inactive leaf to release automatically when the active leaf opens. Does the Adams Rite 1870 do that?
No. The 1870 throws and retracts its hex bolt on a 360 degree key turn, so the leaf stays where the key left it. For automatic release driven by the active leaf, the ABH 1860P/1862P is an automatic flush bolt pair and the Ives FB41 is an automatic flush bolt set for wood doors; the Ives FB42 is the top automatic bolt for wood doors. Automatic bolts suit openings where staff should not have to remember to unlock the second leaf; the keyed 1870 suits openings where only management should be able to change it.
9) Should I use a key-operated flushbolt or a manual lever flushbolt on a pair of doors?
It depends on who you want operating the inactive leaf. The Adams Rite 1870 is cylinder-operated, so only a keyholder throws or retracts it, which suits multi-tenant and institutional openings where an unauthorized lock-down is a problem. A manual flushbolt is quicker and cheaper where anyone on staff may secure the leaf. ZenSupply carries manual versions such as the ABH 1855S single flush bolt for metal doors with a 3/4 inch throw and the Trimco 3999 corner mount flushbolt. Note the 1870 is a narrow stile aluminum product; those manual sets are built for metal and wood doors.
10) Can I use the Adams Rite 1870 flushbolt on a card reader or access control opening?
Yes. The 1870 is compatible with Adams Rite electric strikes, so the active leaf can run on access control while the inactive leaf stays key-secured by the flushbolt. The flushbolt itself is mechanical, cylinder-driven, so it holds the inactive leaf whether or not power is present.
11) Can I key the Adams Rite 1870 flushbolt into my building master key system?
Yes, because the cylinder is your choice. The 1870 accepts any standard 1 inch mortise cylinder with an MS cam, so you can supply one in your existing keyway and have it pinned to your master system. That is also how you standardize a run of paired doors across a building on one key.
12) Which flush bolt should I use on a wood or solid brass residential-style door pair instead of the Adams Rite 1870?
The 1870 is engineered for narrow stile aluminum doors and is a commercial part. For wood door pairs, the Ives FB41 automatic flush bolt set and the Ives FB42 top automatic flush bolt with auxiliary fire latch are both built for wood doors. Where the look matters on a finished opening, the Delaney 4108 6 inch square end solid brass flush bolt and the Delaney 4101 7 inch slide type mortise-in flush bolt are mortised into the door edge. None of those are key operated the way the 1870 is.
13) Is a 6 inch corner mount flushbolt like the Trimco 3999 a drop-in replacement for the Adams Rite 1870?
They are not interchangeable preps. The Trimco 3999 is a 6 inch corner mount flushbolt with a rounded end and the 3999SE is the square end version of the same corner mount; the Orca 86SQ is a 6 inch flush bolt with radius corners. The 1870 is a cylinder-operated unit with a 1 inch by 6 7/8 inch face plate that needs a mortise cylinder cutout and a chosen backset of 31/32 inch or 1-1/8 inch in the stile. Swapping to a corner mount bolt means a different door prep, not just a different faceplate.
14) What is the simpler alternative to the Adams Rite 1870 if I only need one bolt at the bottom of the inactive leaf?
A single manual bolt covers that. The ABH 1855S is a manual flush bolt single for metal doors with a 3/4 inch throw, and the ABH 1858 is a universal bottom fire bolt with manual operation. The International Door Closers FB-1202 is a flush bolt with a positive U joint actuator, 5/8 inch throw, 1/8 inch offset with 7/8 inch backset, square end, with guide. The 1870 differs in that it throws a hexagonal 3/8 inch bolt with 11/16 inch throw by key and requires a separately purchased mortise cylinder.
15) Do I need to specify handing and faceplate shape on the Adams Rite 1870 the way I would on a Trimco or Orca flushbolt?
Yes, the 1870 is ordered by handing, LH or RHR and RH or LHR, and by faceplate shape in bevel, flat, radius, or radius with weatherstrip, along with backset and finish. The Trimco 3999 and 3999SE differ from each other by end shape, rounded versus square, and the Orca 86SQ is a 6 inch flush bolt with radius corners. Confirm the stile face profile before ordering the 1870, since the faceplate choice is part of the part number rather than a field-trimmed detail.
16) For an aluminum storefront pair, why choose the Adams Rite 1870 over a Delaney or Emtek flush bolt?
The 1870 is engineered specifically for narrow stile aluminum doors and comes in anodized finishes that match storefront framing: 313 dark bronze anodized, 335 black anodized, and 628 clear anodized. The Delaney 4363 is a 7 inch mortise extension flush bolt and the Delaney 4108 is a 6 inch square end solid brass flush bolt; Emtek flush bolts are the decorative range. Those are mortise-in bolts for thicker door edges rather than narrow aluminum stiles, which is the practical dividing line on a storefront opening.
17) My inactive leaf needs a longer rod to reach the header. Is the Adams Rite 1870 the part for that?
The 1870 is a compact keyed unit with a 1 inch by 6 inch by depth case and a 1/2 inch door strike, throwing a short 11/16 inch hex bolt at the point where it is mounted. When the run to the header calls for a rod, the Ives FB457 is a manual flush bolt with a 12 inch rod length for metal doors, and the Delaney 4363 is a 7 inch mortise extension flush bolt. Measure the distance from the bolt location to the strike point before deciding between a compact bolt and a rod type.
18) Do I need the weatherstrip faceplate on an Adams Rite 1870 flushbolt?
Only on exterior pairs where the doors carry weatherstripping at the stile. The radius with weatherstrip faceplate is cut to clear that seal; the plain radius, flat, and bevel plates are for openings without it. Match the plate profile to the stile edge you actually have, since the faceplate seats flush against it.
19) Which finish of the Adams Rite 1870 flushbolt matches my existing aluminum storefront doors?
Three anodized finishes are made: 628 clear anodized for standard mill or silver aluminum, 313 dark bronze anodized for bronze storefront, and 335 black anodized for black frames. The description also lists US3, US4, US10B, US32, and US32D finish options. Match the faceplate to your existing door hardware rather than the frame if the two differ.
20) For a metal door pair, what are the alternatives to the Adams Rite 1870 flushbolt?
Several flush bolts are built for metal doors: the ABH 1854 manual flush bolt set with fire bolt, the ABH 1855S manual flush bolt single with 3/4 inch throw, and the Ives FB457 manual flush bolt with a 12 inch rod length. The 1870 is designed for narrow stile aluminum doors, with hollow metal and wood door options available in the series, and is the choice when key control of the inactive leaf is the requirement rather than manual operation.
How fast can I get the Adams Rite 1870-25-628 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 Adams Rite 1870-25-628 come with a warranty?
Absolutely. The Adams Rite 1870-25-628 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 Adams Rite 1870-25-628?
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 Adams Rite 1870-25-628 from ZenSupply?
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