Imperial USA TH1100 Series 10"...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$12.78
Imperial USA TH1100 Series 10" Rod, 1/8" Backset Flush Bolt

Imperial USA TH1100 Series 10" Rod, 1/8" Backset Flush Bolt

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Model: IMPTH1100-FB1-DU
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$12.78
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Imperial USA TH1100 Series 10" Rod, 1/8" Backset Flush Bolt

The 10 in. long mortise flush bolts are great for use on commercial storefront, architectural aluminum and glass narrow stile doors. Intended to securely lock an inactive door, it comes to replace most brands of storefront flush bolts due to its flawless integration.

Features:

  • Replaces most brands of storefront flush bolts
  • Ensures that inactive storefront door remains latched
  • Designed to work on any radius faced narrow stile aluminum door
  • 10 in. long flush bolt with 1/8 in. backset
  • Spring loaded lever action
  • Rod extension: 7/8 in. throw
  • Adjustment on rod length: 5/8 in.
  • Supplied with nylon keeper and fasteners
  • 1/2 in. nylon tip with beveled corners to prevent binding
  • Face dimensions: 15/16 in. x 4-1/4 in.
  • Radius corner: 5/32 in.
  • Made for easy installation

Manufacturer Resources

Product Specs

Subcategory:
Parts and Accessories
Product Group:
Door Trim and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Flush Bolt
Commercial/Residential:
Commercial
Product Model:
TH1100-FB1
Product Size:
10"
Product Category:
Door Trim and Accessories
Department:
Door Hardware

Imperial USA IMPTH1100-FB1-DU – Frequently Asked Questions

1) Can this replace the flush bolt already in my storefront door, even if it's a different brand?
In most cases yes. The TH1100 flush bolt is built to replace most brands of storefront flush bolts and to drop into any radius faced narrow stile aluminum door. The two things to match before you pull the old one are the mortise pocket length (this one is 10 inches) and the backset, which is 1/8 inch here.
2) How far does the rod throw, and will it reach my header or threshold keeper?
Rod extension is 7/8 inch of throw, with 5/8 inch of adjustment built into the rod length. That adjustment is what lets you dial in the engagement when the header channel or threshold strike sits slightly deeper or shallower than nominal. A nylon keeper is supplied with the bolt.
3) Can the Imperial USA TH1100 flush bolt replace another brand's storefront flush bolt in an existing aluminum door?
Yes, in most cases. The TH1100-FB1 is a 10 inch mortise flush bolt with a 1/8 inch backset built to replace most brands of storefront flush bolts, and it is designed to work on any radius faced narrow stile aluminum door. The face measures 15/16 inch by 4-1/4 inch with a 5/32 inch radius corner, so before ordering, measure the existing bolt face and pocket: if the old face is wider or taller than 15/16 by 4-1/4, the new one will not cover the cutout. It also allows 5/8 inch of adjustment on rod length and throws 7/8 inch, which absorbs most of the variation between brands at the header keeper. The Kaba Ilco FLB Series flush bolt is another storefront flush bolt option to consider for the same style of opening.
4) I need a flush bolt for a hollow metal or wood pair, not a storefront door - is the TH1100 the right one?
The Imperial USA TH1100-FB1 is built for commercial storefront, architectural aluminum, and narrow stile glass doors, with a radius face and a 1/8 inch backset sized to the thin stile of an aluminum door. A hollow metal or wood pair uses a much deeper mortise pocket and a flat face, so that 1/8 inch backset and 15/16 inch by 4-1/4 inch radius corner face will not suit it. Look instead at a flush bolt built for the door material you have, such as the Kaba Ilco FLB Series flush bolt, and confirm the face and backset against the door prep.
5) What comes in the box with the Imperial TH1100 flush bolt, and do I need to order anything else?
It ships with a nylon keeper and fasteners, so the bolt, its strike and the mounting screws are covered. Nothing else is required for the flush bolt itself. Note it locks the inactive leaf only, so the active leaf still needs its own lock or exit device.
6) Is this a top or bottom flush bolt, and can I use two on the same inactive leaf?
The TH1100 is a mortise flush bolt with a spring loaded lever action, and it isn't handed or dedicated to one end. The same 10 inch bolt works at the head or at the sill, so a pair on the inactive leaf gives you engagement top and bottom. The rod tip is 1/2 inch nylon with beveled corners so it enters the keeper without binding.
7) Should I use a flush bolt or a surface bolt on the inactive leaf of a storefront pair?
A mortise flush bolt like the TH1100 recesses into the stile, leaving only a 15/16 by 4-1/4 inch face exposed, so there is nothing to catch on and nothing to vandalize. It does require milling a 10 inch pocket in the stile. A surface bolt screws onto the face of the door and needs no mortising, which is the easier retrofit but leaves hardware standing proud. On an aluminum storefront that's already prepped, the flush bolt is the cleaner match.
8) What is the difference between the Imperial USA TH1100 flush bolt and the Kaba Ilco FLB flush bolt?
Both are flush bolts used to hold an inactive door leaf latched. The Imperial USA TH1100-FB1 is specified as a 10 inch mortise flush bolt with a 1/8 inch backset, a spring loaded lever action, a 7/8 inch rod throw, and a 1/2 inch nylon tip with beveled corners to reduce binding, and it is shipped with a nylon keeper and fasteners. It is aimed specifically at commercial storefront, architectural aluminum, and narrow stile glass doors with radius faces. The Kaba Ilco offering is the FLB Series flush bolt. Match the backset and face dimensions to your door stile before choosing between them.
9) What finishes does the Imperial USA TH1100 flush bolt come in?
Two: AL aluminum and DU duronodic. Aluminum matches clear anodized storefront framing; duronodic is the dark bronze anodized look used on older and bronze-toned storefronts. Pick whichever matches the door stile, since the 15/16 by 4-1/4 inch face plate sits exposed on the edge.
10) Do I get the same flush bolt in a dark finish to match existing storefront hardware?
Yes. The Imperial USA TH1100-FB1 10 inch flush bolt is offered in AL aluminum and DU duronodic finishes, so it can be matched to either clear anodized or dark bronze storefront. The mechanical specification is identical between them - 1/8 inch backset, 7/8 inch throw, 15/16 inch by 4-1/4 inch face - so finish is the only selection you are making. If your opening needs a finish outside those two, the Kaba Ilco FLB Series flush bolt is the alternative storefront flush bolt to evaluate.
How fast can I get the Imperial USA IMPTH1100-FB1-DU 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 Imperial USA IMPTH1100-FB1-DU come with a warranty?
Absolutely. The Imperial USA IMPTH1100-FB1-DU 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 Imperial USA IMPTH1100-FB1-DU?
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 Imperial USA IMPTH1100-FB1-DU 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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