Skip to main content
Home / Assemblies and Fasteners / Picture Frame Backboard Connecting Plate, Straight Connector, Flat Iron Plate, Flat Angle Bracket, Furniture Fastener, Black Corner Reinforcement Plate

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Assemblies and Fasteners
Origin -
Material Cold-rolled Steel
Color Matte Black
Finish Type Powder Coated
Connector Shape Straight Flat Plate
Primary Application Picture Frame Backboard Assembly
Secondary Application Furniture Corner Reinforcement
Mounting Hardware Screws Not Included
Corrosion Resistance High
Package Quantity 20 Pieces per Pack
Weight Capacity Suitable for Light to Medium Duty Frames

6 reviews

A

Anonymous

Mar 23, 2026

Rating: 5/5

Sturdy and discreet

I used these to repair an old wooden cabinet corner. They are strong enough to hold the joint tight and the matte black makes them almost invisible against the dark wood.

A

Anonymous

Mar 22, 2026

Rating: 5/5

Essential for frame makers

If you make frames professionally, keep a box of these handy. They are much better than trying to nail small strips of wood. Very consistent quality across the pack.

A

Anonymous

Mar 19, 2026

Rating: 5/5

Simple and effective solution

Straightforward product that does exactly what it says. The flat design ensures the frame hangs flush against the wall without any bumps from the connector.

A

Anonymous

Mar 18, 2026

Rating: 3/5

Works well but screws sold separately

The plates themselves are fine, but I was disappointed that no screws were included. Had to run to the hardware store to find matching black screws which delayed my project.

A

Anonymous

Mar 17, 2026

Rating: 4/5

Good value, minor finish inconsistency

Overall a great product for the price. One or two plates had a tiny scratch on the coating, but it doesn't affect functionality. They hold the backboards securely.

A

Anonymous

Mar 16, 2026

Rating: 5/5

Perfect for custom framing projects

These plates are exactly what I needed to reinforce the back of my large custom frames. The black finish blends in perfectly, and the steel feels very sturdy without being too thick.

5 FAQ

Q: Can I bend these plates if I need a different angle?

A: These are made of cold-rolled steel and are designed to remain straight. Attempting to bend them may crack the powder coating or weaken the structural integrity. We suggest purchasing our L-brackets if you need angled support.

Q: Can these be used outdoors?

A: While the powder-coated finish offers good corrosion resistance, these plates are primarily designed for indoor use. Prolonged exposure to rain or direct sunlight may eventually degrade the coating.

Q: Are these plates pre-drilled?

A: Yes, each plate comes with two pre-drilled holes to facilitate easy and accurate installation into your frame or furniture piece.

Q: What size screws are recommended for these plates?

A: We recommend using #6 or #8 flat-head wood screws, approximately 1/2 inch to 3/4 inch in length, depending on the thickness of your frame material.

Q: Will the black color rub off on white matting?

A: No, the powder-coated finish is cured and stable. It will not transfer color to your matting or artwork under normal conditions.

Explore your interests

View More
All Categories
Best Seller (30)
New List (30)
Waterproof Swim Bag, Wet Clothes Storage Tote with Handle, Large-Capacity Outdoor Hot Spring Pouch Dedicated for Mobile Phones

Waterproof Swim Bag, Wet Clothes Storage Tote with Handle, Large-Capacity Outdoor Hot Spring Pouch Dedicated for Mobile Phones

$59.96

Magic Expandable Bag, Foldable Shopping Tote, Portable Large-Capacity Storage for Grocery, Travel, and Mall Trips

Magic Expandable Bag, Foldable Shopping Tote, Portable Large-Capacity Storage for Grocery, Travel, and Mall Trips

$6.80

Dancolin Blending Stump Set for Oil Pastels, Art Student Tools for Heavy-Color Oil Painting, Dual-Tip Pointed and Round DIY Soft Wax Drawing, Smudging, Mixing, Highlighting, Erasable Knife for Painting and Color Blending

Dancolin Blending Stump Set for Oil Pastels, Art Student Tools for Heavy-Color Oil Painting, Dual-Tip Pointed and Round DIY Soft Wax Drawing, Smudging, Mixing, Highlighting, Erasable Knife for Painting and Color Blending

$16.80

Shanlian Hubei Brush Small Perfect Brush Washer - Ceramic Ink Dish, Calligraphy Cleaning Tool, Moisturizing Water Pot, Art Supply Decor

Shanlian Hubei Brush Small Perfect Brush Washer - Ceramic Ink Dish, Calligraphy Cleaning Tool, Moisturizing Water Pot, Art Supply Decor

$14.20

Yanyu Mineral Water Fish Tank Stand - Triangular Bracket for Inverted Bottle Self-Made Water Circulation System

Yanyu Mineral Water Fish Tank Stand - Triangular Bracket for Inverted Bottle Self-Made Water Circulation System

$17.05

Jingdezhen Pink Peony Flourishing Tea Canister Ceramic Lidded Loose Tea Storage Jar CYG-4578 One Jin Capacity Pu'er

Jingdezhen Pink Peony Flourishing Tea Canister Ceramic Lidded Loose Tea Storage Jar CYG-4578 One Jin Capacity Pu'er

$450.60

Round Sponge Brush Stamp with Mushroom Head – Printing Tool for Kindergarten Art and Kids' Crafts

Round Sponge Brush Stamp with Mushroom Head – Printing Tool for Kindergarten Art and Kids' Crafts

$0.27

Metal Wick Centering Tool with Wooden Base for DIY Scented Candle Making

Metal Wick Centering Tool with Wooden Base for DIY Scented Candle Making

$1.28

Custom Temporary Bank Account Opening Sign, Company Signboard, Stainless Steel Door Plate, PVC Simple Plaque, Acrylic Advertising Board

Custom Temporary Bank Account Opening Sign, Company Signboard, Stainless Steel Door Plate, PVC Simple Plaque, Acrylic Advertising Board

$15.20

Natural Raw Crystal Diffuser Stones 500g - Same Style as Certain Summer Brand, Flameless Indoor Decor (White, Green, Purple, Yellow, Black, Blue)

Natural Raw Crystal Diffuser Stones 500g - Same Style as Certain Summer Brand, Flameless Indoor Decor (White, Green, Purple, Yellow, Black, Blue)

$10.20

Iron Chain, Flower Pot Hanging Chain with Iron Rings, Black Suspension Chain for Bird Cages and Garden Planters

Iron Chain, Flower Pot Hanging Chain with Iron Rings, Black Suspension Chain for Bird Cages and Garden Planters

$0.10

Sheepskin Rattle with Brass Bells - Handmade Wooden Peach Wood Baby Toy for Chewing, Perfect for Children's Day

Sheepskin Rattle with Brass Bells - Handmade Wooden Peach Wood Baby Toy for Chewing, Perfect for Children's Day

$10.80

Commercial Square Insulated Warmer Cabinet with Constant Temperature Heating, Countertop Display Case for Roast Duck, Chicken, Fried Chicken, Smoked Goose, and BBQ Meat

Commercial Square Insulated Warmer Cabinet with Constant Temperature Heating, Countertop Display Case for Roast Duck, Chicken, Fried Chicken, Smoked Goose, and BBQ Meat

$338.00

PISEN Desktop Cable Organizer - Magnetic Data Cord Manager, Soft Silicone Fixed Wire Winder with Adhesive Clips, Mini Portable Hub

PISEN Desktop Cable Organizer - Magnetic Data Cord Manager, Soft Silicone Fixed Wire Winder with Adhesive Clips, Mini Portable Hub

$10.10

Handcrafted Peach Wood and Sheepskin Rattle with Brass Jingle Stick – Traditional Chewable Wooden Baby Toy

Handcrafted Peach Wood and Sheepskin Rattle with Brass Jingle Stick – Traditional Chewable Wooden Baby Toy

$74.00

DC Drive DCS550-S02-0050-05-00-00

DC Drive DCS550-S02-0050-05-00-00

$10,838.20

Waterproof Storage Bag for Clothes and Bathroom Use, Large-Capacity Drawstring Organizer for Men and Women, Outdoor Travel and Toiletry Pack

Waterproof Storage Bag for Clothes and Bathroom Use, Large-Capacity Drawstring Organizer for Men and Women, Outdoor Travel and Toiletry Pack

$39.90

Steel Speed Bump with Rubber Surface for Cars and Railways

Steel Speed Bump with Rubber Surface for Cars and Railways

$3,668.00

Huaboshi Thickened Resin Vegetable Planter Box – Rectangular Plastic Balcony Grow Container with Drainage Tray

Huaboshi Thickened Resin Vegetable Planter Box – Rectangular Plastic Balcony Grow Container with Drainage Tray

$45.99

New Data Cable Storage Bag Travel Digital Charger Cord Organizer Protective Visible Multi-Use Portable Case

New Data Cable Storage Bag Travel Digital Charger Cord Organizer Protective Visible Multi-Use Portable Case

$1.64

Press Wash Blade for KBA Printing Presses - Model KBA105 Ink Scraper, 1160*40mm

Press Wash Blade for KBA Printing Presses - Model KBA105 Ink Scraper, 1160*40mm

$40.50

Genuine Pirelli Run-Flat Car Tire P7 225 245 275 285/35 40 45 R18 19 20 21

Genuine Pirelli Run-Flat Car Tire P7 225 245 275 285/35 40 45 R18 19 20 21

$336.00

Chuangshidai 100XP Compact Desktop Fume Extractor for Soldering Irons - Rapid Smoke Purification

Chuangshidai 100XP Compact Desktop Fume Extractor for Soldering Irons - Rapid Smoke Purification

$696.00

Multi-Function Kitchen Sink Rack - Dish Drying Organizer for Bowls and Plates

Multi-Function Kitchen Sink Rack - Dish Drying Organizer for Bowls and Plates

$33.10

Water Brush Kids Water Painting Book Graffiti Special Pen Water Sketchbook Eco-Friendly Safe Tap Water Refillable Pen Set

Water Brush Kids Water Painting Book Graffiti Special Pen Water Sketchbook Eco-Friendly Safe Tap Water Refillable Pen Set

$2.16

No-Drill Over-Toilet Storage Rack for Bathroom Restroom Organizer

No-Drill Over-Toilet Storage Rack for Bathroom Restroom Organizer

$8.90

Jingdezhen Blue and White Porcelain Antique Brush Washer, Traditional Chinese Painting Calligraphy Brush Rinse Basin, Large and Small Water Pots

Jingdezhen Blue and White Porcelain Antique Brush Washer, Traditional Chinese Painting Calligraphy Brush Rinse Basin, Large and Small Water Pots

$16.90

Sketch Blending Stump Set for Art Students - Highlight Detail Shadow Tool Kit with Replacement Sponge Heads for Beginners

Sketch Blending Stump Set for Art Students - Highlight Detail Shadow Tool Kit with Replacement Sponge Heads for Beginners

$9.00

Changyiyou Outdoor Large-Capacity Wheeled Duffel Bag - Thickened Storage Backpack with Wheels for Camping Gear and Travel

Changyiyou Outdoor Large-Capacity Wheeled Duffel Bag - Thickened Storage Backpack with Wheels for Camping Gear and Travel

$109.00

Lightweight Waterproof Dry Bag for River Trekking and Rafting – Travel Storage for Clothes, Shoes, Socks with Moisture-Proof Buckle, Roll-Top Carry Design

Lightweight Waterproof Dry Bag for River Trekking and Rafting – Travel Storage for Clothes, Shoes, Socks with Moisture-Proof Buckle, Roll-Top Carry Design

$15.80