You may also like
NGP 659 Aluminum Offset Threshold 7" x 1/2" with Fluted Top
Professional Door Threshold Solution
The NGP 659 Offset Threshold provides a durable aluminum transition solution for commercial door applications. Constructed from aluminum alloy 6063 with T5 temper, this threshold measures 7" wide x 1/2" tall with a fluted top surface for enhanced traction. The offset design accommodates various door configurations while maintaining structural integrity with typical wall thickness of .125" and weighing .89 lbs./ft.
Professional Features & Benefits
- Precision Dimensions: 7" wide x 1/2" tall profile designed for standard commercial door applications with reliable fit and function.
- Heavy-Duty Construction: Aluminum alloy 6063 with T5 temper provides exceptional durability and corrosion resistance for long-term performance.
- Fluted Top Surface: Textured surface design enhances traction and safety while maintaining professional appearance.
- Offset Design: Specialized offset configuration accommodates various door hanging requirements and installation conditions.
- Complete Installation Package: Includes #10 x 1-1/2" FH zinc plated wood screws for secure mounting and professional installation.
- Finish Options: Available in Mill Aluminum finish and Dark Bronze finish to complement various architectural styles.
- Lightweight Profile: At .89 lbs./ft., the threshold provides strength without excessive weight for easier handling and installation.
Technical Specifications
- Commercial/Residential: Commercial
- Department: Door Hardware
- Hang Type: Offset Hung
- Product Category: Door Trim and Accessories
- Product Group: Door Trim and Accessories
- Product Subgroup: Door Thresholds
- Product Type: Thresholds - Saddle
- Series: Offset 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 engineered for demanding commercial applications. The precision-manufactured profile with .125" typical wall thickness ensures consistent performance and long-term durability. Engineered for demanding commercial applications where dependable performance is essential.
Manufacturer Resources
NGP Threshold Catalog
Product Specs
- Product Group:
- Door Trim and Accessories
- Series:
- Offset Threshold Series
- Product Subgroup:
- Door Thresholds
- Product Type:
- Thresholds - Saddle
- Subcategory:
- Thresholds
- Commercial/Residential:
- Commercial
- Hang Type:
- Offset Hung
- Product Category:
- Door Trim and Accessories
- Department:
- Door Hardware
NGP 659-36 – Frequently Asked Questions
1) Will the NGP 659 offset threshold work with an offset-hung door?
That's exactly what the 659 is cut for. It's an offset hung threshold, meaning the raised section sits under the door face and the lower leg carries the traffic side, so the door closes against the offset rather than riding over a flat saddle. If your door hangs in the plane of the frame with no offset, a flat saddle threshold like the Pemko 272 Series is the shape you want instead.
2) What size opening does the NGP 659 threshold cover, and what lengths can I get?
The 659 profile measures 7 inches wide by 1/2 inch high, and it comes cut to 36, 48, 72 and 84 inch lengths. For a standard 3-0 single door the 36 inch piece covers the opening; a 6-0 pair takes the 72 inch. The 84 inch length is there for wider openings or for trimming down on site, since aluminum extrusion cuts clean with a miter saw.
3) Is a 1/2 inch high threshold a tripping problem in a public building?
At 1/2 inch tall the 659 sits at the height where the transition matters. The fluted top gives traction across the walking surface, but the rise itself is a half inch of vertical change. If you're working an opening where a low profile is the deciding factor, the Pemko 272 Series is a 1/4 inch by 6 inch flat saddle, half the height of the 659.
4) I need a threshold on a fire rated opening - is the NGP 659 the right choice?
Specify against the rating on the door schedule. The Cal-Royal CR3700 saddle threshold series carries a 3-hour positive pressure fire rating, and the Cal-Royal CR2000 saddle threshold series is fire rated and ADA compliant. Both are saddle thresholds in the same commercial class of work as the NGP 659 aluminum offset threshold. Where the opening drawing calls out a fire rating for the sill assembly, work from the CR3700 or CR2000 series rather than substituting on profile alone.
5) Do I need to buy screws separately for the NGP 659 threshold?
No, the 659 ships with #10 x 1-1/2 inch flat head zinc plated wood screws for mounting. Those are sized for wood substrate. If you're anchoring into concrete or a slab, which is the usual case on a commercial exterior opening, you'll need to supply your own masonry anchors and drill for them.
6) What finishes does the NGP 659 come in, and can I match dark bronze doors?
Two finishes: mill aluminum and dark bronze. Dark bronze matches anodized bronze storefront and dark bronze door frames; mill aluminum is the raw silver extrusion finish that pairs with clear anodized aluminum entrances. Both finishes are available in all four lengths, 36, 48, 72 and 84 inches.
7) Is the NGP 659 aluminum threshold strong enough for heavy foot traffic?
It's an extruded 6063 aluminum alloy in T5 temper with a typical wall thickness of .125 inch, which is the standard commercial threshold extrusion spec. 6063 T5 is corrosion resistant, so it holds up at an exterior opening exposed to weather and salt. The fluted top surface also wears better underfoot than a smooth one, since the flutes keep traction as the surface polishes.
8) Is the Cal-Royal CR2000 a direct swap for the NGP 659?
Treat them as different parts, not a straight swap. The NGP 659 is a 7 inch by 1/2 inch offset threshold in aluminum alloy 6063 T5 with a fluted top, supplied in 36, 48, 72 and 84 inch lengths in mill aluminum and dark bronze. The Cal-Royal CR2000 is a saddle threshold series described as fire rated and ADA compliant. Both are saddle-type thresholds for commercial openings, but the 659 is specifically an offset hung profile. Match the profile and width to the sill condition and the door hanging before crossing brands.
9) Can I standardize on the NGP 659 threshold across a whole facility?
It's built for that. The 659 is a commercial grade threshold, and with four stock lengths in two finishes it covers single doors, pairs and oversize openings from one part number. Spec'ing one profile across a campus means one replacement part to stock and a consistent look at every entry. Note the 659 is offset hung, so it only standardizes across openings where the doors hang offset.
10) For a high-traffic entrance, does the fluted top on the NGP 659 matter compared with other saddle thresholds?
The NGP 659 has a fluted top surface, a textured face intended for traction underfoot, on a 7 inch by 1/2 inch aluminum 6063 T5 profile. The Pemko 272 is described as a heavy-duty aluminum flat saddle at 1/4 inch by 6 inch. Where the crossing is wet or heavily walked, the fluted face of the 659 is the surface treatment on offer; where the priority is the lowest crossing height in a 6 inch footprint, the 272 profile is the flatter, lower one. Both are aluminum.
How fast can I get the NGP 659-36 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 659-36 come with a warranty?
Absolutely. The NGP 659-36 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 659-36?
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 659-36 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.