NGP 424 Aluminum Saddle Thresh...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$39.45
$30.91
NGP 424 Aluminum Saddle Threshold 3/8" x 4" with Fluted Top

NGP 424 Aluminum Saddle Threshold 3/8" x 4" with Fluted Top

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Model: 424-36
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$39.45
$30.91
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NGP 424 Aluminum Saddle Threshold 3/8" x 4" with Fluted Top

Professional Door Threshold Solution

The NGP 424 Aluminum Saddle Threshold delivers professional-grade door transition performance with precise 3/8" x 4" dimensions. Constructed from aluminum alloy 6063 with T5 temper and .125" typical wall thickness, this fluted top threshold provides reliable service for commercial applications. Complete installation hardware included with 10 zinc-plated wood screws.

Professional Features & Benefits

  • Precise Dimensions: 3/8" x 4" profile designed for standard door applications with optimal transition performance.
  • Heavy-Duty Construction: Aluminum alloy 6063 with T5 temper provides exceptional durability and corrosion resistance for long-term performance.
  • Professional Wall Thickness: .125" typical wall thickness ensures structural integrity under regular foot traffic and door operation.
  • Fluted Top Design: Textured surface provides enhanced traction and slip resistance for improved safety.
  • Complete Installation Kit: Includes 10 1-1/2" FH zinc plated wood screws for secure mounting to various substrates.
  • Lightweight Design: 0.61 lbs/ft weight facilitates easy handling and installation while maintaining structural performance.
  • Multiple Finish Options: Available in Aluminum Mill finish, DKB Dark Bronze, and optional SIA Slip Resistant Finish for hazardous conditions where safety is a priority.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Product Category: Door Trim and Accessories
  • Product Group: Door Trim and Accessories
  • Product Subgroup: Door Thresholds
  • Product Type: Thresholds - Saddle
  • Series: Saddle Threshold Series
  • 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 NGP Quality?

NGP threshold products deliver professional-grade reliability with aluminum alloy 6063 T5 temper construction and .125" wall thickness for demanding commercial applications. The fluted top design and optional slip-resistant finishes provide enhanced safety performance where hazardous conditions require priority attention. Engineered for dependable performance in high-traffic commercial environments.

Manufacturer Resources

NGP Threshold Catalog

Product Specs

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

NGP 424-36 – Frequently Asked Questions

1) Will the NGP 424 saddle threshold work in a 36 inch door opening?
Yes. The 424 comes cut to 36, 48, and 72 inch lengths, so a standard 36 inch opening takes the 36 inch piece straight out of the box. The 48 and 72 inch lengths cover wider single leaves and pairs. Both the Mill Aluminum and Dark Bronze finishes are offered in all three lengths.
2) Do I need to buy screws or anchors separately for the NGP 424 threshold?
Screws are included: ten 1-1/2 inch flat head zinc plated wood screws ship with the threshold. Those suit a wood substrate. If you are setting into concrete or tile you will need masonry anchors of your own, since only the wood screws are supplied.
3) What saddle threshold should be used instead of the NGP 424 on a fire rated door opening?
The NGP 424 is a 3/8 inch by 4 inch aluminum saddle threshold with a fluted top, built from 6063 alloy in T5 temper with a .125 inch typical wall. When the opening carries a fire rating, the Cal-Royal CR3700 saddle threshold series is built for it and carries a 3-hour positive pressure fire rating, and the Cal-Royal CR2000 saddle threshold series is offered in a fire rated, ADA compliant design. A specifier working to a rated opening on the drawing should call out the CR3700 or CR2000 by series and confirm the length needed for the frame.
4) Which saddle threshold is specified when the opening has to meet ADA?
For an opening being detailed to ADA, the Cal-Royal CR2000 saddle threshold series is offered in an ADA compliant design, and the Pemko 272 series is an ADA compliant flat saddle threshold at 1/4 inch by 6 inch in heavy-duty aluminum. The NGP 424 is the 3/8 inch by 4 inch aluminum saddle with a fluted top, available in mill aluminum and dark bronze in 36, 48 and 72 inch lengths, and an optional slip resistant SIA finish for hazardous conditions. An institutional buyer standardizing a facility to an accessibility detail should specify the CR2000 or the Pemko 272 by series.
5) Is the NGP 424 threshold strong enough for a high traffic commercial entry?
It is built for commercial use: aluminum alloy 6063 with T5 temper and .125 inch typical wall thickness. That wall thickness is what keeps a saddle from deforming under carts and constant foot traffic, and 6063 resists corrosion at an exterior sill. The fluted top adds traction underfoot.
6) Which finish should I order for the NGP 424, mill or dark bronze?
Two finishes are stocked: Mill Aluminum, the raw silver aluminum look that blends with aluminum storefront and most commercial frames, and Dark Bronze (DKB), which matches dark bronze anodized entrances and bronze door hardware. NGP also offers an SIA slip resistant finish as an option where the sill sees water or grease.
7) Is a fluted saddle threshold slippery when wet?
The flutes on the 424 are the traction feature: the ribbed top breaks up a flat aluminum surface so a wet shoe has something to bite. Where the sill is genuinely hazardous, standing water, grease, a pool deck, NGP offers the SIA slip resistant finish as an add on rather than relying on the flutes alone.
8) Can I cut an NGP 424 threshold down to fit my opening?
Yes. It is extruded 6063 T5 aluminum, so a 72 inch length cuts down cleanly with a miter saw and a non ferrous blade. Buyers standardizing a building often order the 72 inch and cut to each opening rather than stocking three lengths, then drill fresh holes for the supplied 1-1/2 inch wood screws.
9) Will a saddle threshold like the NGP 424 seal out water and drafts on an exterior door?
A saddle threshold is a transition and wear surface, not a weather seal on its own. The 424 gives you a flat 4 inch bearing surface for the door bottom to land on; to actually stop air and water you pair it with a door bottom sweep or automatic door bottom that seals against the top of the saddle. On an interior or vestibule door the saddle alone is usually all that is wanted.
10) What is the difference between a fluted top saddle threshold and a flat one?
A fluted top carries a textured, ridged walking surface. The NGP 424 uses that fluted top for traction and slip resistance, and adds an optional SIA slip resistant finish for hazardous conditions. The Pemko 272 series is a flat saddle threshold, a smooth top face at 1/4 inch by 6 inch in heavy-duty aluminum. Property managers replacing a worn saddle in an entry that sees wet shoes usually want the fluted face of the 424; a flat face like the 272 gives a smooth uninterrupted transition across the opening.
How fast can I get the NGP 424-36 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 424-36 come with a warranty?
Absolutely. The NGP 424-36 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 424-36?
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 424-36 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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