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NGP 427E Saddle Threshold Mill Aluminum 1/2" x 7" with Fluted Top
Professional Door Threshold Solution
The NGP 427E Saddle Threshold delivers professional-grade door transition performance with precision-extruded aluminum alloy 6063, T5 temper construction. Measuring 1/2" tall by 7" wide, this fluted top threshold provides reliable door sealing and smooth transitions for commercial applications. The mill aluminum finish offers durability and corrosion resistance, while the typical wall thickness of .109" ensures structural integrity at 1.08 lbs./ft.
Professional Features & Benefits
- Precision Dimensions: 7" wide x 1/2" tall profile designed for standard door openings with optimal clearance and sealing performance.
- Heavy-Duty Construction: Aluminum alloy 6063, T5 temper provides exceptional durability and corrosion resistance for long-term commercial use.
- Fluted Top Design: Textured surface enhances traction and safety while providing effective water drainage and debris management.
- Optimal Wall Thickness: .109" typical wall thickness delivers structural strength while maintaining lightweight installation at 1.08 lbs./ft.
- Complete Installation Hardware: Includes #10 x 1-1/2" FH zinc plated wood screws for secure mounting to various substrates.
- Mill Aluminum Finish: Natural aluminum finish provides corrosion resistance and accepts paint or anodizing for custom applications.
- Optional Slip-Resistant Upgrade: SIA slip-resistant finish available 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 precision .109" wall thickness for demanding commercial applications. The fluted top design and optional slip-resistant finish options provide enhanced safety performance where dependable operation is essential. Engineered for long-term durability with complete installation hardware included for professional results.
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 427E-34 – Frequently Asked Questions
1) What lengths does the NGP 427E saddle threshold come in, and which one fits a standard 36 inch door?
The 427E is stocked in 36, 42, 48, 60, 72, 73, 84 and 96 inch lengths. A single 36 inch door opening takes the 36 inch piece; the 72 and 73 inch lengths cover a pair of 36 inch doors, and 84 and 96 inch pieces let you cut to fit wider openings or store fronts. Aluminum extrusion cuts cleanly with a miter saw and a non-ferrous blade.
2) How tall is the NGP 427E threshold, and will a door clear it?
It is a 1/2 inch high by 7 inch wide saddle profile. That half inch is the rise the door bottom has to clear, so figure your undercut and any door bottom sweep off 1/2 inch above the finished floor. The 7 inch width gives you enough bearing to sit under both the door and the frame stops.
3) Do I need to buy screws separately for this threshold?
No. The 427E ships with #10 x 1-1/2 inch flat head zinc plated wood screws. Those work for wood subfloors and framing. If you are anchoring into concrete you will need masonry anchors or sleeve anchors instead, since the supplied screws are wood screws.
4) Is the NGP 427E only sold in mill aluminum, or can I get it in bronze to match my dark frames?
Both. Every length is offered in mill aluminum and in dark bronze, so you can match dark anodized entrances without painting. Mill is the raw natural aluminum and it will take paint or anodizing if you need a custom color.
5) Should I use a saddle threshold like this or a panic/offset threshold?
A saddle sits symmetrically across the opening and is what you want when the door closes onto the threshold and you need a clean transition on both sides, typically exterior swing doors on a flat floor. Offset or thermal-break thresholds are the choice when there is a floor height change or you need to break the exterior slab from an interior finish. The 427E is the flat-floor saddle case, 1/2 inch by 7 inches with a fluted walking surface.
6) What is the difference between the Cal-Royal CR2000 and CR3700 saddle thresholds when neither the NGP 427E nor a flat saddle fits my spec?
Both are saddle threshold series from Cal-Royal. The CR2000 Series is described as fire rated with an ADA compliant design, while the CR3700 Series is specified with a 3-hour positive pressure fire rating. Choose based on the hourly rating and positive pressure language on your door schedule.
7) Which saddle threshold gives the most traction underfoot at an exterior entrance?
The NGP 427E uses a fluted top, a textured surface that adds traction and helps shed water and debris, and it can be ordered with an SIA slip-resistant finish for hazardous conditions. By contrast the Pemko 272 Series is a flat saddle profile. If the entry sees wet weather, the fluted 427E surface is the one built for that condition.
8) What is the fluted top on the NGP 427E for?
The ridged top face adds traction underfoot and gives water and grit somewhere to go rather than sitting on a flat surface. On entrances where slip is a real hazard, NGP also offers an SIA slip-resistant finish on this threshold as an upgrade.
9) Can I standardize the 427E across all the exterior doors in my building?
That is a reasonable fleet choice. One profile, 1/2 x 7 inches, in two finishes and eight stock lengths from 36 to 96 inches covers single doors, pairs, and wider openings you cut down, so you carry one part rather than several. Keep the finish consistent (mill or dark bronze) so replacements years out still match.
How fast can I get the NGP 427E-34 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 427E-34 come with a warranty?
Absolutely. The NGP 427E-34 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 427E-34?
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selection,
installation tips, and troubleshooting. Contact Us
Why buy the NGP 427E-34 from ZenSupply?
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Our team is always ready to help you choose the right product for your project.