NGP 680 Heavy Duty Automatic D...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$248.67
NGP NGP 680 Automatic Door Bottom with Nylon Brush Seal, Heavy Duty Surface NGP-680

NGP 680 Heavy Duty Automatic Door Bottom with Nylon Brush Seal

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Model: 680A-36
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$248.67
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NGP 680 Heavy Duty Automatic Door Bottom with Nylon Brush Seal

Professional Automatic Sealing Solution for Commercial Applications

The NGP 680 Heavy Duty Automatic Door Bottom provides reliable sealing performance with a durable nylon brush seal designed for commercial door applications. Constructed from aluminum alloy 6063 with T5 temper and synthetic polyamide components, this automatic door bottom offers excellent abrasion resistance and flexibility with a temperature range of -70 F to 425 F. Available in lengths from 11" minimum to 60" maximum with 7/8" maximum drop capability for versatile installation requirements.

Professional Features & Benefits

  • Heavy-Duty Construction: Aluminum alloy 6063 with T5 temper provides exceptional durability and corrosion resistance for long-term commercial performance.
  • Temperature Versatility: Operating range from -70 F to 425 F ensures reliable function across extreme environmental conditions.
  • Flexible Sizing Options: Available in lengths from 11" minimum to 60" maximum with field cutting capability for 36" and longer units (up to 4" reduction).
  • Maximum Drop Performance: 7/8" maximum drop provides effective sealing against air infiltration and sound transmission.
  • Carpet-Friendly Design: Nylon brush seal recommended for carpet applications where no threshold is provided, offering gentle contact without damage.
  • Environmental Compliance: REACH and RoHS compliant materials meet current environmental and safety standards.
  • Complete Installation Package: End caps furnished standard for professional finished appearance and proper seal integrity.
  • Specialized Applications: Half mortise option available (specify HM in item number) for recessed installation requirements.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Product Category: Door Trim and Accessories
  • Product Group: Door Trim and Accessories
  • Product Subgroup: Door Bottom Sweeps and Door Shoes
  • Product Type: Automatic Door Bottoms
  • Subcategory: Gaskets & Weatherstripping

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 NGP Quality?

NGP automatic door bottoms deliver professional-grade sealing performance with aluminum alloy 6063 construction and synthetic polyamide components engineered for excellent abrasion resistance and flexibility. The temperature range of -70 F to 425 F and REACH/RoHS compliance demonstrate NGP's commitment to reliable performance in demanding commercial applications where effective environmental sealing is essential.

Product Specs

Product Group:
Door Trim and Accessories
Product Subgroup:
Door Bottom Sweeps and Door Shoes
Product Type:
Automatic Door Bottoms
Subcategory:
Gaskets & Weatherstripping
Commercial/Residential:
Commercial
Product Category:
Door Trim and Accessories
Department:
Door Hardware

NGP 680A-36 – Frequently Asked Questions

1) Will the NGP 680 automatic door bottom work over carpet with no threshold?
That's the case the nylon brush seal is built for. NGP recommends the brush version of the 680 for carpet where no threshold is provided, because the brush sweeps the pile instead of dragging a solid insert across it. With 7/8 inch of maximum drop, it has enough travel to clear carpet on the swing and still close the gap when the door shuts.
2) Surface mounted or mortised: which NGP 680 do I order?
Standard, the 680 mounts to the face of the door bottom, no routing required. If the detail calls for the unit recessed into the bottom rail, there's a half mortise option, specified by adding HM to the item number. Decide that before you order, since it changes the prep the door needs.
3) How much gap under the door will an automatic door bottom close?
The 680 drops a maximum of 7/8 inch below the housing, so it seals undercuts up to that. Measure from the bottom of the door to the finished floor at the widest point of the sweep, not just at the hinge side, and stay inside 7/8 inch. If your undercut is larger than that, the fix is raising the floor or a threshold, not a bigger drop.
4) What is the closest surface mounted automatic door bottom to the NGP 680 if I need a different insert material?
The Pemko SA Series surface mount automatic door bottom is the direct functional equivalent. Both are automatic door bottoms that drop a seal when the door closes, and both are stocked in a 36 inch length. The difference is the seal itself: the NGP 680 carries a nylon brush seal, while the Pemko SA3-36 uses a GREENGUARD Gold certified Eco-V insert. Choose the 680 brush where the door closes over carpet with no threshold, and the SA Series where a low emission solid insert is specified for the project.
5) Can a Pemko 345 door sweep be used instead of an NGP 680 automatic door bottom?
They are not interchangeable, even though both seal the bottom of the door. The Pemko 345 Series is a door bottom sweep, a fixed seal that rides in contact with the floor or threshold at all times. The NGP 680 is an automatic door bottom: the seal is retracted while the door swings and drops up to 7/8 inch only when the door closes. On an opening with carpet or an uneven floor, the 680 clears the obstruction on every swing while the fixed 345 sweep would drag across it. Use the 345 where the floor is flat and constant contact is acceptable.
6) For a healthcare or school project with low emission material requirements, which automatic door bottom meets the spec?
The Pemko SA Series SA3-36 is the one carrying a GREENGUARD Gold certified Eco-V insert, which is the certification typically called out on healthcare and education submittals. The NGP 680 is REACH and RoHS compliant with a nylon brush seal and a temperature range of -70 F to 425 F, so it answers a chemical content and extreme temperature specification rather than an indoor air emissions one. Match the part to the line item on the drawing.
7) I need a 60 inch automatic door bottom for a wide opening. Does the Pemko SA3-36 cover it?
No. The Pemko SA3-36 is a 36 inch surface mount automatic door bottom. The NGP 680 runs from 11 inch minimum to 60 inch maximum and is stocked at 36 inch, 48 inch, and 60 inch in anodized aluminum, gold, and dark bronze, so a wide leaf or a pair of doors is covered by the 680 range. Units 36 inches and longer can also be field cut up to 4 inches to hit an odd door width.
8) Can an NGP 680 automatic door bottom handle a freezer, boiler room, or unconditioned exterior door?
Temperature range on the 680 is -70 F to 425 F. The extrusion is 6063-T5 aluminum alloy and the seal components are synthetic polyamide, chosen for abrasion resistance and flexibility, so cold does not make the seal brittle at the low end of that range. That covers walk-in cold storage, mechanical rooms, and exterior openings in any US climate.
9) Do I need to buy end caps separately for the NGP 680?
End caps come with it as standard, so the housing arrives ready to finish out. What you're supplying is the fasteners appropriate to your door material and, if you ordered the HM version, the mortise prep in the bottom rail.
10) Which finishes does the NGP 680 come in, and will they match the rest of my door hardware?
Three finishes: anodized aluminum, gold, and dark bronze. Anodized aluminum reads as a match alongside clear anodized frames and aluminum storefront; dark bronze pairs with dark anodized entrances and oil rubbed trim; gold sits with brass trim. All three are offered in each of the 36, 48 and 60 inch lengths, so a building standardizing on one finish can run it across every door width.
11) What is the difference between an automatic door bottom and a door sweep?
A sweep is fixed: the seal rides on the floor all the time, which wears it and drags on carpet. An automatic door bottom like the NGP 680 retracts when the door opens and drops as it closes, up to 7/8 inch, so the seal only touches the floor when the door is shut. If a sweep is what your opening actually needs, ZenSupply carries the Pemko 345 Series door bottom sweep with a rain drip and PemkoPrene insert, which is the better call on an exterior door where you want water shed away from the threshold.
12) I need a rain drip at the bottom of an exterior door, not just a seal. What should I order?
The NGP 680 is a sealing device only, with a nylon brush seal and aluminum alloy 6063 T5 housing. If the opening needs water shed as well, the Pemko 345 Series 36 inch door bottom sweep is furnished with a rain drip and a PemkoPrene insert in one part, so the drip and the seal mount together at the bottom rail. Where an exterior door needs both, contractors often specify the 345 for the drip and reserve automatic bottoms like the 680 for interior openings over carpet.
13) What is the simpler alternative to an automatic door bottom for a standard interior office door?
A fixed door bottom sweep such as the Pemko 345 Series is the simpler part. It has no drop mechanism, no end caps to set, and nothing to adjust after hanging. The NGP 680 is the heavier assembly, with a nylon brush seal, 7/8 inch maximum drop, end caps furnished standard, and field cutting on 36 inch and longer units up to 4 inches. Specify the 680 when the door has to clear carpet or a raised floor covering on every swing; specify a fixed sweep when the floor is flat and the door can carry a seal in constant contact.
14) Both of these mount to the face of the door. What is the difference between a surface mount and a half mortise automatic door bottom?
A surface mount unit screws to the face of the door bottom rail and stands proud of it, which is how the Pemko SA Series SA3-36 is furnished. The NGP 680 mounts the same way as standard, but is also available as a half mortise by adding HM to the item number, which recesses the housing into the door edge for a flush appearance. If the door is already prepped for a recessed bottom, or the architect wants the housing hidden, the HM version of the 680 is the one to order.
15) Is the NGP 680 suitable for high traffic commercial openings, or is it a residential part?
It's a commercial-rated part. Heavy duty 6063-T5 aluminum extrusion, polyamide working components rated for abrasion, and it's specified into office buildings, schools, healthcare, retail, warehouses, multi-tenant residential and government facilities. For an MRO buyer standardizing across a facility, the three lengths and three finishes let you spec one part number family across every door in the building.
16) Are NGP automatic door bottoms REACH and RoHS compliant for a government or institutional spec?
Yes, the 680 is built from REACH and RoHS compliant materials. On public and institutional work where the submittal asks for restricted-substance documentation, that's the compliance statement NGP publishes for this unit.
How fast can I get the NGP 680A-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 NGP 680A-36 come with a warranty?
Absolutely. The NGP 680A-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 NGP 680A-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 NGP 680A-36 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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