NGP 410 Aluminum Threshold 2-1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$26.70
$20.91
NGP 410 1/4" Smooth Surface Threshold, Milled Aluminum Finish

NGP 410 Aluminum Threshold 2-1/2" x 1/4" Smooth Surface with Milled Finish

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Model: 410-36
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$26.70
$20.91
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NGP 410 Aluminum Threshold 2-1/2" x 1/4" Smooth Surface with Milled Finish

Professional Door Threshold Solution

The NGP 410 aluminum threshold delivers professional-grade door sealing performance with precise 2-1/2" width x 1/4" height dimensions. Constructed from aluminum alloy 6063 with T5 temper for enhanced durability, this smooth surface threshold is BHMA certified to ANSI/BHMA A156.21 standards with 1,000 lb. load test rating. The milled aluminum finish provides long-lasting appearance while the .125" typical wall thickness ensures reliable installation in commercial applications.

Professional Features & Benefits

  • Precise Dimensions: 2-1/2" wide x 1/4" tall profile designed for optimal door clearance and weather sealing performance.
  • Heavy-Duty Load Rating: BHMA certified to ANSI/BHMA A156.21 with 1,000 lb. load test for reliable performance in high-traffic applications.
  • Premium Aluminum Construction: Aluminum alloy 6063 with T5 temper provides exceptional strength-to-weight ratio and corrosion resistance.
  • Smooth Surface Design: Smooth top surface minimizes trip hazards while providing effective weather barrier protection.
  • Automatic Door Bottom Compatibility: Specifically recommended for use with automatic door bottoms for optimal sealing results.
  • Complete Installation Hardware: Includes #10 x 1-1/2" FH zinc plated wood screws for secure mounting.
  • Lightweight Construction: .36 lbs./ft. weight facilitates easy handling and installation while maintaining structural integrity.
  • Durable Mill Finish: Milled aluminum finish provides consistent appearance and natural corrosion protection.

Technical Specifications

  • Department: Door Hardware

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 threshold products deliver professional-grade reliability with aluminum alloy 6063 construction and T5 temper rating for demanding commercial applications. BHMA certification to ANSI/BHMA A156.21 standards with 1,000 lb. load test ensures dependable performance where reliable door sealing is essential. Engineered for smooth operation and long-term durability in high-traffic environments.

Manufacturer Resources

NGP Threshold Catalog

Product Specs

Department:
Door Hardware
Commercial/Residential:
Commercial
Product Category:
Door Trim and Accessories
Product Group:
Door Trim and Accessories
Product Subgroup:
Door Thresholds
Product Type:
Thresholds - Saddle
Subcategory:
Thresholds

NGP 410-36 – Frequently Asked Questions

1) Will the NGP 410 threshold work under a door with an automatic door bottom?
That's the pairing NGP recommends for the 410. At 1/4 inch high with a smooth flat top, the 410 gives an automatic door bottom a clean, uninterrupted surface to seal against instead of a raised stop or ramp. If you're relying on a door sweep or an ADB for the weather seal, the 410 is the saddle to put under it.
2) Is a 1/4 inch high threshold low enough to avoid a trip hazard in a public building?
The 410 stands 1/4 inch tall with a flat, smooth top and no ramp or raised stop. Quarter-inch is the height at which a level change needs no beveling at all under accessibility practice, so it's the lowest-profile saddle you can specify short of a flush pan. That's why it shows up in schools, healthcare, retail and municipal work where floor transitions get scrutinized.
3) Does the NGP 410 threshold come with fasteners, or do I need to buy screws separately?
Screws are in the box: #10 x 1-1/2 inch flat head zinc plated wood screws. Those are sized for wood substrate. If you're setting the saddle on concrete or a poured slab, you'll want masonry anchors of your own instead, since the supplied wood screws won't hold in concrete.
4) Should I use a flat saddle threshold or a thermal break / raised stop threshold for an exterior door?
A flat saddle like the NGP 410 is a transition and a bearing surface, not a weather dam by itself. At 2-1/2 inches wide and 1/4 inch high it works where you're sealing with an automatic door bottom or sweep, or on an interior opening where you just need to cover a floor joint. For an exterior door taking driving rain with no ADB, you want a threshold with a raised stop or an integral seal instead. NGP recommends the 410 specifically with automatic door bottoms, and that's the combination to build around.
5) Is 2-1/2 inches wide enough to cover the floor gap under my door, or do I need a wider saddle?
The 410 measures 2-1/2 inches across the width. That covers a typical single-door floor joint where the saddle sits under the door and laps the finished floor on each side. If your opening has a wider gap, a floor track being covered, or a pair of doors meeting at the centerline, step up in width: ZenSupply carries the Pemko 272 Series flat saddle at 1/4 inch x 6 inches, which spans well over twice the footprint at the same low height.
6) What is the closest equivalent to the NGP 410 threshold if a wider sill plate is needed to cover the full opening?
The NGP 410 is a smooth-surface aluminum saddle threshold 2-1/2 inches wide by 1/4 inch tall, built from 6063-T5 aluminum alloy and offered in 36 inch and 48 inch lengths in mill aluminum and dark bronze. When the sill or the demolition scar under the door is wider than 2-1/2 inches, the Pemko 272 is a flat saddle threshold in aluminum at the same 1/4 inch height but 6 inches wide, so it covers substantially more of the floor while keeping the same low rise at the door. Both are flat saddle profiles, so the door clearance and sweep or automatic door bottom setup is judged against the same 1/4 inch top surface.
7) What lengths and finishes does the NGP 410 aluminum threshold come in?
The 410 saddle comes in 36 inch and 48 inch lengths, each in mill aluminum or dark bronze. Both finishes are offered in both lengths. Aluminum cuts easily with a miter saw and a non-ferrous blade, so a 36 inch piece covers a standard single opening and the 48 inch covers wider openings or gets trimmed to your frame.
8) Which saddle threshold should be specified for an accessible entrance where the change in level at the door matters?
The NGP 410 is a smooth top surface saddle threshold with a 1/4 inch height, a profile chosen so the top surface minimizes trip hazards while still forming a weather barrier. Where a submittal has to name a threshold described as ADA compliant, the Cal-Royal CR2000 series is offered as a fire rated and ADA compliant saddle threshold and the Pemko 272 series is described as an ADA compliant flat saddle threshold, the Pemko at 1/4 inch by 6 inches. The three are the same family of flat saddle plates set on the floor of the opening, so the deciding factors are the width of the plate and what the specification language on the job requires.
9) Is the Pemko 272 a drop-in replacement for an NGP 410 already installed in a door opening?
They are not interchangeable at the same anchor pattern even though both are flat aluminum saddle thresholds at 1/4 inch height. The NGP 410 is 2-1/2 inches wide and ships with #10 x 1-1/2 inch flat head zinc plated wood screws, while the Pemko 272 is a 6 inch wide flat saddle. Swapping to the wider plate means new anchor holes and enough clean floor on both sides of the door to seat 6 inches of plate; going the other direction leaves the old 6 inch footprint exposed. Where the existing 2-1/2 inch footprint is being matched, the NGP 410 in 36 inch or 48 inch is the like-for-like plate, in mill aluminum or dark bronze.
10) What threshold pairs with an automatic door bottom, and what changes if a different saddle is used?
The NGP 410 is specifically recommended for use with automatic door bottoms, and its smooth 2-1/2 inch by 1/4 inch top surface is what the drop seal lands on to make the seal. Any flat saddle at the same 1/4 inch height gives the seal a comparable landing surface, including the Pemko 272 flat saddle threshold at 1/4 inch by 6 inches. Saddle thresholds selected instead for a rated opening, such as the Cal-Royal CR3700 series with its 3-hour positive pressure fire rating, are chosen on the rating of the assembly first, so confirm the top surface and height suit the drop seal stroke before setting the door bottom.
11) How heavy is the NGP 410 threshold per foot?
The 410 runs .36 lbs. per foot, so a 48 inch piece is a little under a pound and a half of extrusion. One person carries and sets it without help, which matters when you're doing a run of openings across a building in a day.
12) Will an aluminum threshold corrode at an exterior door or in a wet area?
6063 aluminum with a T5 temper forms its own oxide layer, so the 410 resists corrosion without a coating and the mill finish holds its appearance rather than rusting out the way a steel saddle would. Where it does need attention is galvanic contact: don't fasten aluminum down with plain steel anchors in standing water. The supplied #10 x 1-1/2 inch screws are zinc plated for that reason.
How fast can I get the NGP 410-36 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 410-36 come with a warranty?
Absolutely. The NGP 410-36 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 410-36?
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 410-36 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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