Will these work on 1/2 inch thick plywood speaker cabinet? I don't want them hanging over and blocking my access to the back of the enclosed cab.

You should be fine. I used them on a 1/2" plywood cabinet and they do not interfere with the front or back plates coming off.

What is the thickness of the metal these are made of?

About 18 gauge or so. Thick enough to be sturdy.

The cabinet corners are not square. What product closes the gap betwen the hole in the corern and the side of the cabinet?

A router with a 1/2 inch round over bit. They are not designed for squared off corners.

Has anyone ever compared these for exact size match to avatar speaker cab chrome corners? these look to be the same exact shape and size.

I am not familiar with the avatar speaker cabinets but what I found on the chrome corners I replaced with these powder coated corners was that they were close enough that I could use a rubber mallet to make them fit. The fit was not exact and I used a drill to create new holes where the old screw holes didn't line up. If you're willing to punch new holes in your speaker cabinet, these might work for you.

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Reliable Hardware Company RH-1530TB-8-A 2-Leg Amp/Cabinet Corner, Textured Black Powder Coat - Set of 8

Product ID: 280926475

Details

Brand
Reliable
Colour
Black
Material
Alloy Steel
Size
3 98 cm x 3 98
Style
Industrial

🎨Durable Black Powder Coat Finish

🔩Precision 0.18'' Mounting Holes

🛠️18 Gauge Alloy Steel Strength

Description

🖤 Amp up your gear’s style and protection with industrial edge!

EASY SCREW IN INSTALLATION - Precision-drilled mounting holes ensure quick, secure assembly without hassle.
INDUSTRIAL GRADE DURABILITY - Crafted from robust 18 gauge alloy steel for long-lasting protection and support.
SLEEK TEXTURED BLACK FINISH - Powder-coated for a modern, scratch-resistant look that elevates your gear’s aesthetic.
SET OF 8 FOR COMPLETE COVERAGE - Get full corner protection and style consistency across multiple cabinets or amps.
PERFECT FIT FOR ROUNDED CORNERS - Designed specifically for rounded cabinet edges—upgrade your amps with confidence.

The Reliable Hardware RH-1530TB-8-A is a set of eight 2-leg cabinet corners made from durable 18 gauge alloy steel, featuring a textured black powder coat finish. Designed for rounded corners, these L-shaped brackets provide robust protection and a sleek industrial look, with precision 0.18'' mounting holes for easy screw-in installation. Ideal for guitar cabinets and combo amps, they combine functionality with modern style to keep your gear safe and looking sharp.

Specifications

ASIN	B00JQYV456
Assembly Instructions Description	Yes, assembly required; comes with assembly instructions
Brand Name	Reliable Hardware
Color	Black
Customer Reviews	4.6 4.6 out of 5 stars (1,045)
Furniture Finish	Powder Coat
Global Trade Identification Number	00856248005327
Included Components	8 corners
Installation Type	Screw-In
Item Depth	1.50 polegadas
Item Dimensions	13 x 13 x 38 millimeters
Leg Style	Tapered Block
Manufacturer	Bienz & Fowlks dba Reliable Hardware Company
Manufacturer Part Number	RH-1530TB-8-A
Material Type	Alloy Steel
Model Number	RH-1530TB-8-A
Number of Items	1
Number of Pieces	8
Required Assembly	No
Set Name	Set of 8
Shape	L shape, Square
Size	3,98 cm x 3,98 cm x 0,50 cm
Style Name	Industrial
UPC	856248005327

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

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The delivery time was excellent, and the packaging was secure.

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