
Brand: Orbit Industries, Inc. | Product No: UFSI
Orbit UFSI Universal Firestop Insert For 1G, 4" Square & 4-11/16 Box - Steel
No se pudo cargar la disponibilidad de retiro
Retiro disponible en Sonic Distribution Center
Normalmente está listo en 24 horasPairs well with
Top-Rated Store • Read Reviews
Fast Shipping • Ships in 1–2 Business Days
30-Day Returns • See Terms
Secure Checkout • SSL Encrypted

Orbit UFSI Universal Firestop Insert For 1G, 4" Square & 4-11/16 Box - Steel
Product details
Description
Category | FIRESTOP |
Page | P31 |
Description: | |
FIREBLOK's Universal Firestop Insert is intumescent thermoplastic pad used as a membrane penetration fire stop in electrical boxes maintaining the fire-resistant ratings of wall assemblies and when the horizontal separation between metallic boxes on opposite sides of the wall is less than 24‚¬� apart. The insert is certified for both 1 & 2 hour, U300, U400, V400 and U411 wall assemblies with metal electrical boxes with plastic or metal cover plates. UFSI can be used in different box sizes from single gang boxes, 4‚¬� Square boxes to 4-11/16‚¬� Square boxes. | |
Features: | |
- 3-3/4" x 3-3/4" x 3/8" - Volume: 2.1 Cu. In. - Easily applied by hand - Expansion begins @ 300°F / 148°C - Highly Intumescent (20+ times its original size) - Certified for both 1 & 2 Hour fire rated wall - Soundproof with a STC Rating 52* - Pre-Molded Ground Screw Openings - Certified for both Plastic and Metal faceplates in all fire-rated walls - Pre-Scored on the back for easy snapping and installation - Warranted for the life of the building when stored below 130°F / 54°C - Adheres to back of electrical box * Tested to ASTM E90 Standard |
|
Specifications: | |
Color | White |
Std Pkg | 30 |
Master CTN | 120 |
Metal Box Size: | |
1-Gang Box: Use half insert for max 2-1/8" x 4" x 2-1/8" in deep 1-Gang box, adheres into back of box | |
4S Box: Use one insert for max 4" x 4" x 2-1/8" in deep 4S box, adheres into back of box | |
5S Box: Use one and a half insert for max 4-11/16" x 4-11/16" x 2-1/8" in deep 5S box, one covering the inside back of the box and half insert on an internal side of the box | |
Certifications: | |
![]() |
|
Catalog Number |
UPC |
Description |
UFSI | 8-35243-02403-8 | UNIVERSAL FIRESTOP INSERT FOR 1-GANG, 4" & 4-11/16" METAL ELECTRICAL BOXES |
Download PDF File
Specification
Customer Reviews
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
-
Shipping Information
Orders placed before 12:00 PM (PST) ship the same day or within 2 business days, with tracking provided within 72 hours. Learn more in our Shipping Policy.
-
Returns & Exchanges
Non-defective items may be returned within 30 days with a 30% restocking fee. Shipping costs are non-refundable, and return shipping is the customer’s responsibility. See our full Return Policy.
-
Top Rated Service
With a perfect 5-star rating on Google, our customers say it best—great prices, outstanding service, and a company that delivers. See why professionals choose Sonic Electric.
-
Expert Support, Anytime
Our team is ready to assist you via chat, email, or phone with product recommendations and technical guidance.
Star Google Rating
Years of Excellence
Happy Customers
Orders Shipped
Ways to Save on Every Order
Smart, simple savings—powered by Sonic.

3% off your First Order
Subscribe to our emails and enjoy 3% off your first purchase—exclusively for new subscribers.

5% off Malibu Products
Use code PLATINUM at checkout.

Free Ground Shipping
Available on all orders over $500. No code needed.

Lowest Price Guarantee
Found a lower price? We’ll match it.
If you see a lower price for the same in-stock item from another retailer, let us know. Just send us the ad, website link, screenshot, or photo through email or chat.
We’ll verify it and match the total price—including shipping or delivery—if the item is available to ship to your location.