Monoprice Inc.
Monoprice Inc. Standard Keystone Plate 3 Port Gray UL
Three-port keystone wall plate fits standard single-gang boxes and accepts Ethernet, HDMI, coaxial and audio jacks for customised low-voltage connections
- Three keystone openings accept Ethernet, HDMI, coaxial and audio jacks for versatile connectivity
- Standard single-gang size fits most electrical boxes and brackets for easy installation
- Durable ABS construction resists impact and scratches for long-term reliability
- Professional gray finish blends with walls and décor in offices or homes
- UL listed for safety compliance in commercial and residential environments
Three-Port Keystone Wall Plate
The Monoprice Standard Size Keystone Plate provides three universal openings for snap-in jacks such as Ethernet, HDMI, coaxial or audio connectors. It fits any single-gang electrical box or low-voltage mounting bracket, making it suitable for residential, office or commercial installations that require a tidy, customizable connection point. The neutral gray finish blends with surrounding décor while the high-impact ABS construction resists scratches and daily wear.
UL-Listed Safety and Thermal Stability
The plate carries a UL listing, confirming it meets recognised safety standards for permanent wall installation. Its ABS plastic body does not generate heat, draw power or produce noise, so it adds no thermal load to the enclosure and remains silent in operation. The material maintains structural integrity at normal indoor temperatures, ensuring the mounted jacks stay securely seated over time without warping or degradation.
Future-Proof Modular Design
Because each port accepts any standard keystone module, installers can mix data, video, audio or voice jacks on a single plate and swap them later without replacing the wall plate itself. This modularity reduces rework when connectivity needs change, such as upgrading from Cat5e to Cat6 or adding an HDMI feed. The snap-in mechanism requires no tools, allowing quick initial setup and simple maintenance by professionals or DIY users alike.
Highlights
- Three keystone openings accept Ethernet, HDMI, coaxial and audio jacks for versatile connectivity
- Standard single-gang size fits most electrical boxes and brackets for easy installation
- Durable ABS construction resists impact and scratches for long-term reliability
- Professional gray finish blends with walls and décor in offices or homes
- UL listed for safety compliance in commercial and residential environments
Specifications
No published specifications for this item yet.
Questions about this item
How do I mount this keystone plate in a standard single-gang electrical box?
The plate is designed to fit standard single-gang electrical boxes and low-voltage mounting brackets. Align the mounting holes with the box screws, secure the plate, then snap keystone jacks into the three openings from the front until they click into place.
Will the ABS plastic plate degrade or require replacement over time?
The high-impact, scratch-resistant ABS construction is built for long-term reliability. Under normal indoor use the plate itself does not degrade or require scheduled replacement; only the keystone inserts may need swapping if connection standards change.
How many keystone jacks can I install before the plate becomes too crowded for cable management?
The plate provides exactly three keystone openings. With all three populated, cable bend radius behind the plate becomes the practical limit, especially with stiff shielded Ethernet or thick coaxial cables in a shallow single-gang box.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.



