Zero 676A 6" X 1/4" Adjustable Threshold
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.
- Adjustable thresholds
- Finish: Mill Finish Aluminum
- Width: 6"
- Thickness: .250"
- Supplied without mounting holes
- ADA Compliant
- Fire Rated
- BHMA Certified
- ANSI: J37100, J37136
Manufacturer Resources
zero thresholds 676 data sheet
Product Specs
- Product Group:
- Door Trim and Accessories
- Product Subgroup:
- Door Thresholds
- Product Type:
- Threshold
- ADA Accessible:
- Yes
- Commercial/Residential:
- Commercial
- Product Finish:
- Aluminum Mill
- Performance Rating:
- Fire Rated-UL10c
- Product Height:
- 1/4"
- Product Width:
- 6"
- Department:
- Door Hardware
Zero International 676A-36 – Frequently Asked Questions
1) Is the Zero 676A threshold ADA compliant for an accessible entrance?
The 676A is ADA compliant. At 1/4 inch high it sits at the maximum height allowed without any bevel treatment, so it clears the accessible route requirement on its own. That makes it a straightforward pick for an entrance you need to keep barrier-free, whether that is a school, clinic, or multi-family lobby.
2) Can the Zero 676A threshold be used on a fire rated door opening?
Yes. The 676A carries a Fire Rated-UL10c performance rating and is BHMA certified under ANSI J37100 and J37136, so it can go under a rated opening. That combination of fire rating plus ADA height is the reason it shows up on rated exterior and stairwell doors where the spec has to satisfy both.
3) Will a 36 inch threshold work for my door opening?
The 676A comes in a 36 inch length, which covers a standard single 3-0 door opening. For a pair of doors or a wider opening you need a longer piece or a butted joint, and for a narrower opening the aluminum can be cut down on site.
4) Does the Zero 676A threshold come with mounting holes and fasteners?
No. The 676A ships without mounting holes, so you lay it out and drill it to suit the opening and the anchor pattern you want. Fasteners are a separate order. The upside is that you set the anchor spacing yourself, which matters when you are dodging rebar or an existing sill condition.
5) What does adjustable mean on the Zero 676A threshold, and why would I want it?
The 676A is an adjustable threshold, meaning the top member can be raised or lowered to close the gap under a door that does not sit at a consistent height. On a rehab where the slab has settled or the door was rehung, that adjustment is what lets you seal the bottom without shimming the whole unit or swapping the door. On new construction with a flat, true slab, a fixed saddle threshold is usually the simpler order.
6) Can the Zero 676A threshold be fastened directly into a concrete slab?
Yes. It is made from heavy-gauge aluminum specifically so it can be drilled and screwed straight into concrete without the buckling under load or loosening screws you get from lighter commercial stock. At 6 inches wide it gives you room for two rows of anchors if the traffic warrants it.
7) What is the difference between the Zero 676A threshold and a Pemko interlocking J hook threshold?
Two different jobs. The 676A is an adjustable aluminum threshold, 6 inches wide by 1/4 inch, that sits on the sill as the walking surface. The Pemko 61 Series is a 36 inch steel interlocking J hook, an accessory piece that mates with a hook strip on the door bottom to make a weather seal at the sill. If you are replacing the saddle itself, the 676A is what you want. If you are building an interlocking weatherseal assembly, the J hook is a component of that, not a substitute.
8) What finish does the Zero 676A threshold come in, and can it be painted or anodized?
Mill finish aluminum, which is the raw unfinished aluminum surface. It is the standard for thresholds because the walking surface wears anyway, and it takes an anodized or painted finish if the architect calls for one. If you need a matching finish out of the box rather than field-applied, specify that up front.
9) Is the Zero 676A a residential or commercial threshold?
Commercial. It is built for heavy traffic openings and those with big temperature swings between inside and outside, which is why the material is heavy-gauge rather than the thinner stock used on residential saddles. For an apartment interior door it is more threshold than the opening needs.
How fast can I get the Zero International 676A-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 Zero International 676A-36 come with a warranty?
Absolutely. The Zero International 676A-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 Zero International 676A-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 Zero International 676A-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.