What is the holes spacing on the 8 x 4 3-way vent?

The screw holes are 12 and 3/4 inches...center to center. It fit perfectly the prior vent cover.

What is the distance between screw holes?

10 and 3/4 (10.75) inches. I replaced the original vent cover and it fit fine.

will a 4 x 10 fit in a 3 3/4 x 9 1/2 opening?

Yes it will work because the iner dimensions is smaller then the outside diameter so your good.if u have a hole exactly the sides of this vent then it won't cuz it won't have to were to screw too.so yes your good this is perfect fit for the measurements your have...

I ended up returning because it was thin and cheap. I went to home depot and bought a metal one for cheaper and painted it. Hope this helped. Michelle

6 X 6 Duct Hole Adjustable Vent Cover Hvac Register

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Sold byAmazon Sri LankaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌬️ Elevate your airflow game with precision and style!

WHISPER QUIET EFFICIENCY - Engineered for smooth, noise-free air distribution, enhancing comfort without distracting sounds in any home or office environment.
CUSTOMIZABLE AIRFLOW CONTROL - Integrated multi-shutter damper and adjustable vertical blades let you effortlessly direct and regulate airflow exactly where you need it.
VERSATILE STYLISH HVAC UPGRADE - Perfect for residential and commercial use, this vent cover doubles as a decorative grille that complements modern interiors while optimizing air circulation.
BUILT TO LAST WITH PREMIUM ALUMINUM - Crafted from high-grade AA6063 extruded aluminum, combining lightweight durability with rust resistance for long-term performance.
PRECISION FIT FOR SEAMLESS INSTALLATION - Designed specifically for 6" x 6" duct holes with a sleek 7.6" x 7.6" visible face, ensuring a flawless upgrade to your HVAC system.

This 6" x 6" adjustable vent cover is crafted from premium extruded aluminum for durability and rust resistance. Featuring a 7.6" x 7.6" visible face, it fits standard duct holes perfectly. Its vertical adjustable blades and built-in damper provide precise airflow control, while its quiet operation makes it ideal for both residential and commercial HVAC systems.

Specifications

ASIN	B09CYC3Q4W
Best Sellers Rank	#13,059 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #82 in Registers, Grilles & Vents
Color	The front is Color White, and the back is the original color grey.
Customer Reviews	4.4 4.4 out of 5 stars (522)
Date First Available	December 10, 2020
Included Components	Screws Included
Item Weight	8.4 ounces
Item model number	LVM 6X6
Manufacturer	Laminaire
Material	Extruded aluminum (rust-free, high-grade, lightweight, and durable)
Package Dimensions	8.5 x 7.8 x 1.97 inches
Shape	Square
Size	6” x 6” Duct Hole
Usage	Commercial/Residential

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