Zero 654A 36" Saddle Threshold without supporting legs, 4"W x 1/2"H, 36" Length, Mill Finish Aluminum
Zero thresholds are designed to stand up to the demands of heavy traffic openings and those with extreme temperature differentials. The heavy-gauge material allows you to drill and screw our thresholds directly into concrete without the difficulties common when using lighter commercial materials, such as buckling under heavy loads or loose screws.
- Saddle Threshold without supporting legs
- Finish: Mill Finish Aluminum
- Length: 36"
- Width: 4"
- Height: 1/2"
- Thickness: .187"
- ADA Rated
- Fire Rated
- BHMA Certified
- ANSI: J32100, J32130
Manufacturer Resources
zero thresholds 654 data sheet
Product Specs
- Product Group:
- Door Trim and Accessories
- Product Subgroup:
- Door Thresholds
- Product Type:
- Thresholds
- ADA Accessible:
- Yes
- Commercial/Residential:
- Commercial
- Performance Rating:
- Fire Rated-UL10c
- Product Height:
- 1/2"
- Product Width:
- 4"
- Department:
- Door Hardware
Zero International 654A 36 – Frequently Asked Questions
1) Will the Zero 654A saddle threshold work on an ADA accessible opening?
Yes. The 654A is ADA accessible, and at 1/2 inch high it sits at the maximum height allowed for a change in level at a doorway. It is a saddle profile with no supporting legs, so it beds flat on the floor rather than bridging a gap.
2) Is the Zero 654 threshold fire rated for use under a fire door?
The 654A carries a UL10c fire rating and is BHMA certified to ANSI J32100 and J32130. That makes it usable in a rated opening where the door assembly calls for a listed threshold.
3) What length do I order for a 3-0 door with the Zero 654A threshold?
Two lengths are made: 36 inches and 48 inches. A standard 3-0 door in a frame takes the 36 inch piece; order the 48 inch and cut it down when the frame opening runs wider than 36 inches or when you need to run past the jambs. The 4 inch width and 1/2 inch height are the same either way.
4) Is the Pemko 61 interlocking J hook a substitute for a Zero 654A saddle threshold?
No. The Zero 654A is a saddle threshold in mill finish aluminum, 4 inches wide by 1/2 inch high, supplied in 36 inch and 48 inch lengths, and it sets in the opening as the threshold itself. The Pemko 61 is an interlocking J hook threshold accessory in steel construction at 36 inches, meaning it is a hook member that works with a threshold rather than one you install on its own. If the opening needs the crossing member under the door, the 654A is the part; the Pemko 61 answers a different need in the same assembly.
5) Can this aluminum threshold be anchored straight into a concrete slab?
Yes. The 654A is heavy gauge aluminum at .187 inch thick, and Zero builds these to be drilled and screwed directly into concrete without buckling under load or working the screws loose the way lighter commercial stock does. Lay it out, drill through the 4 inch face, and anchor it.
6) What is the difference between a saddle threshold and one with supporting legs?
The 654A is a saddle with no legs, so the whole 4 inch by 1/2 inch section rests on the floor surface. That is what you want on a flat, sound slab or an existing finished floor. A legged or panic style threshold is the one to reach for when you have to span a gap, a floor closer trench, or an uneven joint between two floor levels, because the legs carry the load down to the substrate instead of relying on continuous bearing.
7) Is the Zero 654A rated for a commercial entrance with heavy foot traffic?
It is a commercial threshold, built for heavy traffic openings and for doorways with big temperature swings from one side to the other. The heavy gauge material at .187 inch is the reason it holds up where thinner extrusions oil-can underfoot.
8) Do I need anything else besides the threshold to seal the bottom of the door?
A threshold alone closes the gap at the floor, but it does not seal against the door bottom. Pair the 654A with a door bottom sweep or an automatic door bottom so the sweep seats on the 1/2 inch high saddle. If you are joining to an existing interlocking sill, the Pemko 61 Series interlocking J hook is a threshold accessory for that kind of setup.
9) For an accessible commercial opening that also has to hold a fire label, which threshold works and which one does not?
The Zero 654A carries an ADA accessible rating and a Fire Rated-UL10c performance rating, and it is a commercial threshold, so it suits an accessible opening on a labeled door at a 1/2 inch height. The Pemko 61 is an interlocking J hook threshold accessory in steel, which is a component that pairs with a threshold rather than the crossing member a code review looks at. When the requirement on the drawing is the threshold itself, specify the 654A.
10) Will a mill finish aluminum threshold match my other door hardware, or can it be finished?
Mill finish is the only finish the 654A comes in, which is raw uncoated aluminum, a dull silver that dulls further with traffic. On a service entry or back-of-house opening nobody notices it. In a lobby or anywhere the threshold is on show next to anodized or plated hardware, expect a visible mismatch and plan on a finished threshold instead.
How fast can I get the Zero International 654A 36 delivered?
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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 Zero International 654A 36 come with a warranty?
Absolutely. The Zero International 654A 36 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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