Pemko 177AT Latching Panic Sad...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$67.64
Pemko 177AT Latching Panic Saddle Threshold with ThermoSeal Insert, Mill Aluminum Finish

Pemko 177AT Latching Panic Saddle Threshold with ThermoSeal Insert - 5" Width Mill Aluminum

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Model: 177AT 36
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$67.64
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Pemko 177AT Latching Panic Saddle Threshold with ThermoSeal Insert - 5"; Width Mill Aluminum

Professional Door Sealing Solution for Vertical Rod Exit Devices

The Pemko 177AT Latching Panic Saddle Threshold delivers comprehensive protection against sound, air infiltration, wind, and debris with its 5"; width design and 5/8"; door clearance compatibility. This aluminum threshold integrates seamlessly with surface-applied vertical rod exit devices while providing essential door stop and seal functionality. Fire rated and BHMA certified, it features an integrated ThermoSeal gasket insert for superior sealing performance in commercial applications.

Professional Features & Benefits

  • Optimal Door Clearance: 5/8"; door clearance accommodates standard door installations while maintaining effective sealing performance.
  • Versatile Width Design: 5"; width provides comprehensive coverage for commercial door applications with surface-applied vertical rod exit devices.
  • Fire-Rated Construction: UL 10C positive pressure and UL 4L10 listed for fire-rated door assemblies and code compliance.
  • BHMA Certified Quality: ANSI/BHMA A156.21 Thresholds certification ensures professional-grade reliability and performance standards.
  • Sound and Air Infiltration Tested: ASTM E-283-04 and ASTM E 90-2009 tested for verified performance against air infiltration and sound transmission.
  • Premium Sealing Options: Available with ThermoSeal (T), Eco-V (V), and Pile Brush (P) insert options for customized sealing performance.
  • Multi-Function Performance: Acts as both a door stop and seal while remaining compatible with vertical rod exit device operation.
  • Environmental Certification: GREENGUARD Gold Certified for low chemical emissions and indoor air quality protection.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Insert Type: PemkoPrene or Vinyl Insert
  • Product Category: Door Trim and Accessories
  • Product Group: Door Trim and Accessories
  • Product Model: 177
  • Product Subgroup: Door Thresholds
  • Product Substrate: Aluminum
  • Product Type: Commercial Thresholds
  • Subcategory: Thresholds

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 Pemko Quality?

Pemko threshold products deliver professional-grade reliability with aluminum construction and comprehensive testing including ASTM E-283-04 air infiltration and ASTM E 90-2009 sound transmission standards. BHMA A156.21 certification and fire rating ensure code compliance, while GREENGUARD Gold certification provides environmental assurance. Engineered for demanding commercial applications where dependable sealing performance and exit device compatibility are essential.

Product Specs

Insert Type:
PemkoPrene or Vinyl Insert
Subcategory:
Thresholds
Product Group:
Door Trim and Accessories
Product Subgroup:
Door Thresholds
Product Type:
Commercial Thresholds
Commercial/Residential:
Commercial
Product Model:
177
Product Substrate:
Aluminum
Product Category:
Door Trim and Accessories
Department:
Door Hardware

Pemko 177AT 36 – Frequently Asked Questions

1) Will a Pemko 177AT threshold work with a surface vertical rod exit device that latches into the floor?
That's exactly what the 177AT saddle threshold is built for. It's a latching panic saddle, so the top surface accepts the bottom rod strike of a surface-applied vertical rod exit device while still acting as a door stop and seal. A plain saddle threshold has no latching provision, so the bottom rod has nowhere to engage and you end up drilling the finished floor instead. If your exit device is a rim device or a less-bottom-rod setup, you don't need the latching feature and a standard saddle is the simpler buy.
2) What door undercut does the Pemko 177AT threshold need at the bottom of the door?
The 177AT is set up for 5/8 inch door clearance, meaning the gap between the bottom of the door and the top of the threshold. Measure your existing undercut before ordering: if the door bottom sits tighter than that, the door binds on the stop, and if it's much looser the ThermoSeal insert won't make contact and you lose the air and sound seal you bought it for. On a replacement job, cutting the door bottom is usually easier than shimming the threshold.
3) What lengths does the Pemko 177AT saddle threshold come in for a single door versus a pair?
Four lengths: 36, 48, 72, and 96 inches, all in mill finish aluminum. A 36 inch covers a standard 3-0 single door leaf; 48 inch gives you cutting room on a single or covers a wider opening. For a pair of doors, 72 inch handles two 3-0 leaves and 96 inch covers pairs in a wider frame or a door with sidelite. Aluminum thresholds are cut to length in the field, so buy the next size up and trim rather than splicing two pieces at the centerline of a pair.
4) Is the Pemko 177AT threshold approved for a fire rated door opening?
Yes. The 177AT is UL 10C positive pressure and UL 4L10 listed for fire rated door assemblies, and it carries ANSI/BHMA A156.21 certification for thresholds. That's the pair of listings an inspector looks for on a rated exterior opening, and it's the reason this threshold can go under a rated door where an unlisted saddle can't.
5) How wide is the Pemko 177AT threshold and will it cover my existing threshold footprint?
Five inch width. That's wide enough to span a typical commercial frame throat plus the door stop line, which is why it works on exterior openings where you're sealing against wind and driven debris. If you're replacing an older 4 inch saddle, the extra inch usually falls to the exterior side and covers the old fastener holes, but check the sill projection at your opening first.
6) Which insert should I order on a Pemko 177 threshold, ThermoSeal, Eco-V, or pile brush?
Three insert options are offered on the 177: ThermoSeal (T), Eco-V (V), and pile brush (P). The T suffix, which is what 177AT ships with, is the one to specify on exterior openings where you're stopping air infiltration and water, and it's the insert behind the ASTM E-283-04 air infiltration and ASTM E 90-2009 sound testing. Pile brush suits interior or high-cycle openings where you want low drag on the door bottom rather than a hard compression seal. The insert is the letter at the end of the model, so the sealing choice is made at order time, not in the field.
7) Does the Pemko 177AT threshold actually cut sound transmission under a door, or just air?
Both, and it's been tested for each: ASTM E-283-04 for air infiltration and ASTM E 90-2009 for sound transmission. The undercut at the bottom of a door is the single biggest sound leak on most openings, so a compression seal at the threshold does more for an office or exam room than adding mass to the door. You'll only get the tested performance if the perimeter is sealed too, since sound follows the largest remaining gap.
8) Is mill finish aluminum durable enough for a high-traffic entry threshold?
The 177AT body is extruded aluminum in mill finish, which is the standard specification for commercial saddle thresholds and the usual choice across an entire building because every opening then matches. Mill is unfinished aluminum, so it will grey and dull with foot traffic rather than chip or peel the way a coated finish does. For a property manager standardizing across a fleet of doors, mill is the finish that stays visually consistent as new units get added over years.
9) Is the Pemko 177AT threshold rated for commercial use or is it a residential product?
Commercial. The 177AT is specified for office buildings, schools, healthcare facilities, retail, warehouses, multi-tenant residential, and government buildings, and the certifications behind it (BHMA A156.21, UL 10C) are commercial door hardware standards. It's also GREENGUARD Gold certified for low chemical emissions, which matters on schools and healthcare projects chasing indoor air quality credits.
How fast can I get the Pemko 177AT 36 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 Pemko 177AT 36 come with a warranty?
Absolutely. The Pemko 177AT 36 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 Pemko 177AT 36?
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 Pemko 177AT 36 from ZenSupply?
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