NATIONAL GUARD Hardware Prep Filler Kit (MPN HP90-CYL). Key specifications — Brand: NATIONAL GUARD.
SKU 3G-OTH-499058
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Frequently Asked Questions
What is NATIONAL GUARD Hardware Prep Filler Kit used for?
The NATIONAL GUARD Hardware Prep Filler Kit (MPN HP90-CYL) is used to fill and cover unused door prep holes, providing a clean, finished appearance on commercial or industrial doors. It is ideal for maintenance teams and contractors needing to conceal hardware cutouts during door retrofits or repairs.
What are the specifications of the NATIONAL GUARD HP90-CYL?
The NATIONAL GUARD Hardware Prep Filler Kit (MPN HP90-CYL) is a door hole cover and filler plate. Key specifications include the brand NATIONAL GUARD and manufacturer part number HP90-CYL. It is designed for cylindrical prep holes in standard commercial doors. Contact 3G Electric for detailed dimensions and material composition.
Where to buy NATIONAL GUARD HP90-CYL in worldwide?
You can source the NATIONAL GUARD HP90-CYL Hardware Prep Filler Kit through 3G Electric, which supplies genuine industrial parts worldwide. We handle full logistics, customs clearance, and delivery to your site globally. Contact our team for a quote and lead time on this item.
How to install the NATIONAL GUARD Hardware Prep Filler Kit?
To install the NATIONAL GUARD HP90-CYL filler kit, first clean the door prep hole area. Insert the filler plate into the cylindrical opening and secure it using the provided fasteners (typically screws or clips). Ensure the plate sits flush with the door surface. Follow standard door hardware installation practices for best results.
NATIONAL GUARD Products
3G Electric supplies NATIONAL GUARD door hole covers & filler plates. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.



