STI Firestop Plug: 4.64 in Overall Lg, 4.64 in Overall Wd
The STI Firestop Plug (MPN FP400) is a red, non-interlocking firestop plug with a 4.64 in overall length and width, and a 2 hr fire rating. 3G Electric interprets customer demand and delivers this genuine industrial…
SKU 3G-OTH-552160
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Product Description
The STI Firestop Plug (MPN FP400) is a red, non-interlocking firestop plug with a 4.64 in overall length and width, and a 2 hr fire rating. 3G Electric interprets customer demand and delivers this genuine industrial product across 14 departments—and far more—with specialist depth in combustion, pumps, and controls as an authorised distributor for brands including STI, Schneider, ABB, Siemens, SKF, Festo, Fluke, Interpump, and FBR.
Frequently Asked Questions
What is the STI Firestop Plug FP400 used for?
The STI Firestop Plug FP400 is used to seal openings in fire-rated walls and floors, maintaining a 2-hour fire rating. It is a red, non-interlocking plug with 4.64 in dimensions, commonly applied in commercial and industrial construction to prevent fire and smoke spread.
What are the specifications of the STI Firestop Plug FP400?
The STI Firestop Plug FP400 has a 2 hr fire rating, 4.64 in overall length and width, and is red in color. It is non-interlocking and manufactured by STI under MPN FP400. These specs ensure reliable passive fire protection in rated assemblies.
Where to buy the STI Firestop Plug FP400 worldwide?
3G Electric supplies the STI Firestop Plug FP400 worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source genuine STI products and deliver to your site. Contact us for pricing and lead time on this firestop plug.
How to install the STI Firestop Plug FP400?
Install the STI Firestop Plug FP400 by pressing it firmly into a clean, dry opening of matching size. Ensure the plug is fully seated and flush with the surface for a proper fire seal. Follow local fire codes and manufacturer guidelines for best results.
STI Products
3G Electric supplies STI firestop plugs & blocks. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.


