Description
Product Overview
The Prime-Line U 9247 Mending Plates are precision‑engineered components crafted from high‑grade alloy steel and finished with a durable zinc coating. Each plate measures 3/4 inch by 3 inches, offering a fully threaded surface that aligns perfectly with standard pneumatic closing mechanisms used in screen and storm doors. The rectangular prism shape provides a broad contact area, distributing load evenly across repaired wood sections and reducing stress concentrations that can lead to future failures. The glossy zinc finish not only enhances visual appeal but also delivers superior corrosion resistance, extending the service life of the fastener in humid or outdoor environments. Designed for both DIY enthusiasts and professional installers, the plates arrive in a convenient 10‑pack, ensuring you have ample supply for multiple repair projects or bulk applications.
![[Product front view showing all components]](https://www.ecomvia.store/wp-content/uploads/2026/07/607703223e514918a8c69a4aafcedb93.jpg)
Usage
These mending plates excel in a variety of repair scenarios. Whether you are restoring a residential screen door that has suffered wood rot, reinforcing a commercial storm door subjected to high wind pressure, or fixing a hinged door pneumatic system that requires a solid anchoring point, the U 9247 plates provide a reliable solution. The fully threaded design allows the plate to be securely fastened with standard screws, creating a strong mechanical bond that resists loosening over time. Installation requires only basic hand tools such as a screwdriver and a drill, making the process quick and accessible. The plates are especially effective when the damaged area has been stripped or weakened, as the broad plate surface bridges the compromised wood and restores structural integrity.
Why Choose Us
Choosing Prime-Line means selecting a brand with a reputation for quality and reliability in the industrial fastener market. Each mending plate undergoes rigorous testing to meet Rockwell B hardness of B70, ensuring the component can withstand the mechanical stresses typical of door operation. The zinc plating process is applied uniformly, providing a protective barrier against rust and environmental degradation. Prime-Line also backs its products with a one‑year warranty against manufacturing defects, reflecting confidence in material selection and production standards. Moreover, the company offers responsive customer support, ready to assist with installation guidance, part compatibility questions, and warranty claims, reinforcing a commitment to post‑sale satisfaction.
Key Features
- Robust zinc‑plated steel construction delivers long‑lasting corrosion resistance.
- Fully threaded 3/4″ x 3″ dimensions match standard pneumatic door systems for a secure fit.
- Easy installation with common hand tools reduces labor time and effort.
- Provides a broad load‑distribution area that reinforces weakened wood and prevents future cracks.
- Backed by Prime‑Line’s one‑year warranty and dedicated customer support for peace of mind.
FAQ
What size screws should I use with the U 9247 plates?
The plates are designed for standard #8 to #10 wood screws. Using screws within this range ensures optimal thread engagement and load‑bearing capacity.
Can these plates be used on exterior doors?
Yes. The zinc‑plated finish protects the steel from moisture and UV exposure, making the plates suitable for both interior and exterior door applications.
Do I need any special tools to install the plates?
No special tools are required. A standard screwdriver or drill with a compatible bit will allow you to fasten the plates quickly and securely.
How many plates come in a package?
Each package contains ten individual mending plates, providing ample quantity for multiple repairs or larger projects.
Is the warranty void if I paint over the plates after installation?
The warranty remains valid as long as the plates are not subjected to abnormal conditions, misapplication, or abuse. Painting over the plates does not affect the warranty, provided the coating does not compromise the plate’s structural integrity.




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