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DOUBLE SEMS SCREW (M3) SET
Manufacturer Resources
Product Specs
- Product Group:
- Washroom/Bath Accessories
- Product Subgroup:
- Parts and Accessories
- Product Type:
- double sems screw
- Parts and Accessories Type:
- Fastener
- Department:
- Plumbing
TOTO TH559EDV301 – Frequently Asked Questions
1) What is TOTO part TH559EDV301?
TH559EDV301 is a TOTO double SEMS screw set in M3 size, a small fastener kit used in TOTO plumbing fixtures. SEMS screws come with the washers pre-assembled under the head, so the washer stays captive on the screw during handling and installation.
2) Can I substitute a generic M3 machine screw for the TOTO TH559EDV301 screw set?
Not a straight swap. A plain M3 machine screw lacks the captive washer that a SEMS screw carries, and TOTO specifies the set by part number TH559EDV301 so the screw length and washer match the bracket it fastens. For a service repair on a TOTO fixture, order the part number rather than a hardware-store screw.
3) Is TH559EDV301 a complete repair kit or just the hardware?
Hardware only. TH559EDV301 is the M3 double SEMS screw set, a fastener component for TOTO washroom and bath fixtures. It does not include the bracket, valve body, or any other assembly, so order those separately if your repair needs them.
4) What size thread are the TOTO TH559EDV301 screws?
They are M3, the metric 3 mm thread size used on small TOTO fixture hardware. If the screws you pulled out of the assembly are a larger metric size, TH559EDV301 is not the right replacement set.
How fast can I get the TOTO TH559EDV301 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 TOTO TH559EDV301 come with a warranty?
Absolutely. The TOTO TH559EDV301 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 TOTO TH559EDV301?
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 TOTO TH559EDV301 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.