NGP 425HD Heavy Duty Aluminum ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$138.75
$137.28
NGP 425HD 1/2" Heavy Duty Threshold, Milled Aluminum Finish

NGP 425HD Heavy Duty Aluminum Threshold 5" x 1/2" with Fluted Top

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Model: 425HD-36

In Stock (leaves warehouse same day if ordered before 3pm ET)

$138.75
$137.28
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NGP 425HD Heavy Duty Aluminum Threshold 5" x 1/2" with Fluted Top

Heavy-Duty Commercial Threshold Solution

The NGP 425HD Heavy Duty Threshold delivers professional-grade durability for high-traffic commercial applications. Constructed from aluminum alloy 6063 with T5 temper, this 5" wide x 1/2" tall threshold features a fluted top design for enhanced traction and is specifically engineered for delivery and storage doorways where heavier loads travel. With a typical wall thickness of .244" and weighing 1.6 lbs./ft., this threshold provides reliable performance in demanding environments including forklift and vehicular traffic areas.

Professional Features & Benefits

  • Heavy-Duty Dimensions: 5" wide x 1/2" tall profile designed for high-traffic commercial doorways and loading areas.
  • Premium Aluminum Construction: Aluminum alloy 6063 with T5 temper provides exceptional strength and corrosion resistance for long-term durability.
  • Enhanced Traction Design: Fluted top surface provides improved grip and safety for foot traffic and equipment movement.
  • Heavy Load Capacity: Specifically recommended for delivery and storage doorways where heavier loads travel, including forklift and vehicular traffic applications.
  • Robust Wall Construction: Typical wall thickness of .244" ensures structural integrity under demanding commercial use.
  • Complete Installation Package: Includes #10 x 1-1/2" FH zinc plated wood screws for secure mounting and professional installation.
  • Durable Mill Finish: Mill aluminum finish provides clean appearance while maintaining durability and corrosion resistance.

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 Loading Docks and Delivery Areas
  • Warehouse and Distribution Centers
  • Industrial Facility Doorways
  • Storage and Inventory Areas
  • Forklift Traffic Zones
  • Heavy Equipment Access Points
  • Commercial Service Entrances

Why Choose NGP Quality?

NGP 425HD Heavy Duty Thresholds deliver professional-grade reliability with aluminum alloy 6063 T5 temper construction rated for heavy load applications including forklift and vehicular traffic. The robust .244" wall thickness and fluted top design provide exceptional durability and safety in demanding commercial environments. Engineered for demanding commercial applications where dependable performance is essential.

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 425HD-36 – Frequently Asked Questions

1) What lengths does the NGP 425HD threshold come in, and can I get one for a double door?
Six cut lengths: 36, 40, 48, 72, 84 and 108 inches. A 36 or 40 inch piece covers a standard single opening; for a pair of doors, the 72 or 84 inch lengths cover most double openings, and the 108 inch length runs a wide equipment or dock opening in one continuous piece with no seam in the middle of the traffic path. Order the length at or above your frame-to-frame measurement and cut to fit, since aluminum saddle stock trims with a chop saw.
2) How much does the 425HD threshold raise the floor, and how wide is it?
The 425HD saddle is 5 inches wide across the opening and 1/2 inch tall at its high point. The 5 inch width gives you enough bearing surface to catch both the door's contact line and the joint between the two floor finishes, which is usually why a dock or service doorway gets a threshold in the first place. The 1/2 inch rise is what your door bottom clearance has to accommodate, so check the undercut on the existing door before you set it.
3) Does the NGP 425HD come with fasteners, or do I need to buy anchors separately?
Screws are in the box. The 425HD ships with #10 x 1-1/2 inch flat head zinc plated wood screws. Those suit a wood subfloor or wood-framed sill. If you are setting the saddle on concrete, which is the usual case at a loading dock or warehouse doorway, you will need masonry anchors and a matching drill bit instead, since the supplied wood screws will not hold in slab.
4) Should I use a heavy duty saddle threshold or a flat ADA threshold at my doorway?
It depends on what crosses the opening. The NGP 425HD is the heavy duty choice: 5 inches wide, 1/2 inch tall, .244 inch wall, fluted top, aimed at delivery and storage doorways with forklift and vehicular traffic. Where the opening is a public or accessible entry and the priority is a low crossing rather than load, a flat saddle like the Pemko 272 Series, an ADA compliant flat saddle threshold in 1/4 inch x 6 inch heavy duty aluminum, is the better shape. Dock door, go heavy. Accessible route, go flat.
5) Can I standardize the NGP 425HD across all the exterior doors in my facility?
For service, delivery and equipment openings, yes. The 425HD is a commercial grade saddle and the six stock lengths (36, 40, 48, 72, 84 and 108 inches) cover single doors, pairs, and wide equipment openings from one part number, so a maintenance department can carry one profile and cut to size. Where a door in the same building is on a fire rated or accessible-route opening, that opening needs a threshold selected for that requirement rather than this one.
6) What is the difference between the Cal-Royal CR2000 and CR3700 saddle thresholds when I am cross-shopping against the NGP 425HD?
All three are saddle thresholds. The Cal-Royal CR2000 pairs a fire rated design with ADA compliant geometry, so it addresses both the rating and the accessible rise. The Cal-Royal CR3700 is specified around a 3-hour positive pressure fire rating. The NGP 425HD is the load-duty profile in the group: 5 inches wide by 1/2 inch tall, aluminum alloy 6063 T5 temper, .244 inch wall thickness, fluted top for traction, and it ships with #10 x 1-1/2 inch flat head zinc plated wood screws. Pick by what governs the opening - the rating, the accessible rise, or the traffic crossing it.
7) I am standardizing thresholds across a building with both a warehouse entrance and a rated stair door - can one saddle threshold cover both?
One profile rarely covers both duties. For the warehouse and service entrances, the NGP 425HD is the heavy duty saddle at 5 inches by 1/2 inch with a fluted top and .244 inch wall, made for forklift and vehicular traffic, and it comes in 36, 40, 48, 72, 84 and 108 inch lengths so most openings cut from stock. For the rated stair door, the Cal-Royal CR3700 saddle threshold is built to a 3-hour positive pressure fire rating. Keeping both in the saddle threshold family means the same installation method across the building while each opening gets the profile its duty calls for.
8) What finish does the NGP 425HD threshold come in?
Mill finish aluminum, and that is the only way it is supplied. Mill is the raw extruded aluminum surface, so it reads as a light natural silver and does not need to be matched to a door finish the way an anodized dark bronze saddle would. On a warehouse or service entrance that is normally what is specified anyway, since the surface takes wheel and boot traffic and any coating would wear off the fluted ribs first.
9) Will aluminum corrode at an exterior dock door that gets salt and water?
6063 aluminum in T5 temper is the standard architectural extrusion alloy and resists corrosion without a coating, which is why the 425HD is supplied in mill finish for exterior service openings. What does need attention is the fastening: the included screws are zinc plated, so at a wet or salted dock you should plan on stainless anchors and a bed of sealant under the saddle to keep water from tracking beneath it into the sill.
How fast can I get the NGP 425HD-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 425HD-36 come with a warranty?
Absolutely. The NGP 425HD-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 425HD-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 425HD-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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