ABH 1855S Manual Flush Bolt Si...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$29.00
$17.54
ABH 1855S Manual Flush Bolt Single for Metal Doors with 3/4" Throw

ABH 1855S Manual Flush Bolt Single for Metal Doors with 3/4" Throw

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Model: 1855S-US32D
$29.00
$17.54
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$29.00
$17.54
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ABH 1855S Manual Flush Bolt Single for Metal Doors with 3/4" Throw

Professional Fire-Rated Door Security Solution

The ABH 1855S Manual Flush Bolt provides reliable single-point locking for metal fire doors up to 4'0" x 8'0" with UL listing for up to 3-hour fire ratings. This commercial-grade flush bolt features a 3/4" throw with 3/4" rod basket, standard 12" rod length, and 1-1/2" adjustable bolt head for precise installation. Meets or exceeds BHMA L14251 and ANSI 156.16 standards with a standard weight of 1 lb for professional door hardware applications.

Professional Features & Benefits

  • Fire Door Compatibility: UL Listed for use on metal fire doors up to 4'0" x 8'0" for up to and including 3 hours fire rating.
  • Precision Bolt Operation: 3/4" throw with 3/4" rod basket provides secure engagement with standard 12" rod length for reliable locking.
  • Adjustable Installation: 1-1/2" adjustable bolt head accommodates various door configurations and ensures proper alignment.
  • Industry Compliance: Meets or exceeds BHMA L14251 and ANSI 156.16 standards for commercial door hardware applications.
  • Lightweight Design: Standard weight of 1 lb minimizes door stress while maintaining robust security performance.
  • Extended Bolt Option: Extra long bolt head available at 2-1/2" or to customer specification for specialized applications.
  • BAA Qualified: Meets Buy American Act requirements for government and institutional projects.

Technical Specifications

  • BAA Qualified: Yes
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Keyed: N/A
  • Keyed Function: N/A
  • Product Category: Door Trim and Accessories
  • Product Group: Door Trim and Accessories
  • Product Model: 1855/1857
  • Product Subgroup: Flush Bolts
  • Product Type: Flush Bolts
  • Series: 1855 Series
  • Subcategory: Surface Bolts

Professional Applications

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

Why Choose ABH Quality?

ABH 1855S Manual Flush Bolts deliver professional-grade reliability with UL Listed fire rating compliance and BHMA L14251/ANSI 156.16 certification for demanding commercial applications. The precision-engineered 3/4" throw mechanism and adjustable bolt head ensure dependable performance where fire safety and security are essential. Engineered for commercial door hardware applications where code compliance and reliable operation are critical requirements.

Manufacturer Resources

ABH Full Line Catalog

Product Specs

Product Group:
Door Trim and Accessories
Product Subgroup:
Flush Bolts
Product Type:
Flush Bolts
Subcategory:
Surface Bolts
Commercial/Residential:
Commercial
Keyed:
N/A
Keyed Function:
N/A
Series:
1855 Series
BAA Qualified:
Yes
Product Model:
1855/1857
Product Category:
Door Trim and Accessories
Department:
Door Hardware

ABH 1855S-US32D – Frequently Asked Questions

1) Can I get the 1855 Series flush bolt for wood doors, or is it metal only?
Both. The 1855 Series is ordered by door type, and wood door and metal door versions are both available, in either a single bolt or a pair. Pick the door type that matches the leaf you are boring, since the mounting and bolt case differ between wood and hollow metal.
2) Will the ABH 1855S bolt reach my existing strike, and how much rod do I get?
The bolt throws 3/4" out of a 3/4" rod basket, with a standard 12" rod length and a 1-1/2" adjustable bolt head. The 3/4" throw is the common commercial flush bolt projection, so it engages standard head strikes and floor strikes prepped for that depth, and the adjustable head lets you take up the gap if the frame prep sits slightly off. If the head strike sits deeper than the throw reaches, you need the extra long bolt head.
3) Is this flush bolt Buy American compliant for a government project?
The 1855 Series is BAA qualified, so it clears Buy American Act requirements on federal, municipal, and institutional work. That plus the UL fire listing is usually what a public-sector hardware submittal needs from a flush bolt.
4) I need the inactive leaf bolt to be key controlled. Is the ABH 1855 the right part?
No. The ABH 1855 is a manual flush bolt with no keyed function, operated at the bolt face. For key control on the inactive leaf, the Adams Rite 1870 series is a cylinder operated flushbolt with key control, and the Adams Rite 1877 is a cylinder operated flushbolt built for paired wood doors. Those take a cylinder and a keyway decision; the 1855 does not.
5) What is the closest equivalent to the ABH 1855 manual flush bolt for a metal door with a 12 inch rod?
The Ives FB457 manual flush bolt is the direct counterpart. It is a manual flush bolt with a 12 inch rod length built for metal doors, matching the 1855's manual operation, 12 inch standard rod, and metal door application. Both are fire rated, the FB457 carrying a fire rating and the 1855 UL listed for metal fire doors up to 4'0" x 8'0" for up to and including 3 hours. If the door schedule calls for a manual flush bolt on a hollow metal inactive leaf, either part answers the same line.
6) What should I use instead of a manual flush bolt if the inactive leaf has to release automatically?
Manual bolts like the ABH 1855 are thrown and retracted by hand at the bolt. For an inactive leaf that must release when the active leaf opens, the Ives FB41 automatic flush bolt set for wood doors uses a 3/4 inch throw and carries a 90 minute fire rating, and the Ives FB42 top automatic flush bolt for wood doors adds an auxiliary fire latch. Both are wood door parts, so an automatic solution on a hollow metal pair is a different selection than either.
7) For a federal or municipal project with a Buy American requirement, which flush bolt qualifies?
The ABH 1855 is BAA qualified for government and institutional projects and meets or exceeds BHMA L14251 and ANSI 156.16. Among the alternates, the Ives FB457 for metal doors and the Ives FB358 are fire rated manual flush bolts, and the Adams Rite 1870 adds key control, but the Buy American qualification is the 1855's stated attribute. On a spec that carries both a BAA line and a 3 hour rated metal pair, the 1855 answers both.
8) Manual flush bolt or automatic flush bolt on a pair of fire doors?
The 1855S is manual: someone throws and retracts the bolt by hand at the inactive leaf, which is right where that leaf stays fixed most of the time, such as a stockroom or a cross-corridor pair that only opens wide for equipment. If the inactive leaf has to self-secure whenever it closes, an automatic set is the better fit. Ives FB41 is an automatic flush bolt set for wood doors with a 3/4" throw and a 90 minute fire rating, and the Ives FB42 is a top automatic for wood doors with an auxiliary fire latch.
9) What if my door is taller than standard and a 12 inch rod will not reach?
An extra long bolt head is available at 2-1/2", or made to customer specification, on top of the standard 1-1/2" head with the 12" rod. Specify the longer head at order time; it is an option on the 1855/1857, not something added later in the field.
10) What is the equivalent to the ABH 1855S from another brand?
The closest straight swap is the Ives FB457, a manual flush bolt with a 12" rod length for metal doors and a fire rating, which matches the 1855S metal door version rod for rod. The Ives FB358 is another manual option with a 3/4" throw and a 1/2" bolt diameter, same throw as the 1855S. Both are manual bolts, so the operation on the inactive leaf is unchanged.
11) Will a 6 inch corner mount flush bolt substitute for the ABH 1855S?
Not on a fire door where the 1855S is specified. Bolts like the Trimco 3999 and 3999SE are 6" corner mount flushbolts, and the Orca 86SQ is a 6" bolt with radius corners, all shorter faceplates with a different door prep than the 1855S with its 12" rod. Swapping one in means re-prepping the leaf, and the UL fire listing that covers the 1855S on metal doors up to 4'0" x 8'0" does not carry over.
12) My existing bolt only throws 5/8 inch. Will the ABH 1855S drop into the same strike?
The 1855S throws 3/4", a quarter inch deeper than a 5/8" throw bolt like the International Door Closers FB-1202. A deeper throw is not a problem for a head strike or a floor strike prepped to standard depth, but the faceplate and rod prep differ between the two, so treat it as a new prep rather than a drop-in. The 1-1/2" adjustable bolt head gives you room to dial in engagement once it is mounted.
13) Is there a manual flush bolt with the same 3/4 inch throw but a stated bolt diameter?
The Ives FB358 manual flush bolt carries a 3/4 inch throw with a 1/2 inch bolt diameter, the same throw as the ABH 1855 and its 3/4 inch rod basket. The FB358 is fire rated as well. Where a strike prep is already drilled to a 1/2 inch bolt, the FB358 states that diameter outright; the 1855 answers the same throw dimension with a 1-1/2 inch adjustable bolt head for aligning to an existing prep.
14) What is the difference between the ABH 1855 and a two point flushbolt?
The ABH 1855 is a single point manual flush bolt, sold singly or in pairs, with a 3/4 inch throw and 12 inch standard rod. The Adams Rite MS1880 and MS1881 are two point flushbolts with an interlock mechanism, and the Adams Rite MS2180 is an auto release two point flushbolt with a Smartlock mechanism. Two point units tie top and bottom engagement into one mechanism; the 1855 handles one bolt location per unit, so a top and bottom pair is ordered as the pair option.
15) Can I use a 6 inch flush bolt in place of the ABH 1855?
They serve different doors. The ABH 1855 runs a 12 inch standard rod with a 1-1/2 inch adjustable bolt head and is UL listed for metal fire doors up to 4'0" x 8'0" for up to and including 3 hours. The 6 inch bolts are shorter face plate units: the Trimco 3999 is a 6 inch corner mount rounded end flushbolt, the Trimco 3999SE the 6 inch corner mount square end version, the Orca 86SQ a 6 inch flush bolt with radius corners, and the Delaney 4108 a 6 inch square end solid brass flush bolt. Corner mount and short brass bolts suit lighter and residential style pairs rather than a rated hollow metal opening.
16) Which flush bolt has a shorter throw than the ABH 1855?
The International Door Closers FB-1202 uses a 5/8 inch throw with a 1/8 inch offset, 7/8 inch backset, square end, and a guide, driven by a positive U joint actuator. The ABH 1855 throws 3/4 inch with a 3/4 inch rod basket. If the frame strike pocket was prepped for a 5/8 inch throw at a 7/8 inch backset, the FB-1202 states those numbers directly.
17) What finishes does the ABH 1855 flush bolt come in for matching the rest of my hardware?
Eight finishes across the series: bright brass, satin brass, satin bronze, oil rubbed bronze, satin chrome, bright stainless steel, satin stainless steel, and painted black. All eight are offered on both the metal door and wood door versions and in both single and pair, so a building standardizing on one finish can carry it across every opening.
18) Is the ABH 1855S rated for commercial traffic or is it a residential bolt?
Commercial grade. It is built for office buildings, schools, healthcare, retail, warehouses, multi-tenant residential, and government facilities, and it carries the BHMA L14251 and ANSI 156.16 commercial certification. Lighter decorative flush bolts, such as the Delaney 6" square end solid brass bolt or the Emtek flush bolts, are aimed at a different kind of opening.
19) Is a mortise slide bolt the same thing as the ABH 1855 flush bolt?
Not the same part. The Delaney 4101 is a 7 inch slide type mortise in flush bolt and the Delaney 4363 is a 7 inch mortise extension flush bolt, both operated by a slide in a mortised face plate. The ABH 1855 is a manual flush bolt with a 3/4 inch rod basket and 12 inch rod reaching to the head or sill, listed for metal fire doors up to 3 hours. A slide bolt mortised into the door edge is a different prep and a different reach than a rod and basket assembly.
20) What flush bolt should I look at for a decorative wood pair rather than a commercial metal opening?
The ABH 1855 is a commercial flush bolt and covers both metal and wood door builds across finishes including bright brass, satin brass, oil rubbed bronze, satin bronze, satin chrome, painted black, bright stainless steel, and satin stainless steel. For a decorative residential style pair, Emtek flush bolts and the Delaney 6 inch square end solid brass flush bolt are the alternates in the same function. Those are chosen on appearance and brass construction rather than on a fire rating.
How fast can I get the ABH 1855S-US32D delivered?
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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 ABH 1855S-US32D come with a warranty?
Absolutely. The ABH 1855S-US32D 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 ABH 1855S-US32D?
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
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