External Corners

$18.95

External plastic corners for assembling window screen frames. Available in popular frame sizes and colors matched to our screen frame, in packs of 25, 50, or 100.

99999 in stock

Add to wishlist

Build square, rigid window screen frames without complex miter cuts. Engineered for fast, hassle-free frame assembly, these high-impact external square corners slip directly into straight-cut aluminum screen frame rails—instantly joining them at a crisp $90^\circ$ angle.

Whether you are fabricating brand-new custom window screens or replacing aged, brittle corners on existing frames, these heavy-duty plastic corners deliver a clean, professional finish that holds up against weather exposure and screen tension.

Key Features & Benefits

No Miter Saw Needed: Designed for standard $90^\circ$ straight-cut frame rails. Simply cut your aluminum frame bars straight and press the corners into place for a square frame every time.
High-Impact Weatherproof Plastic: Molded from durable, UV-resistant polymer that resists cracking, chipping, and fading under direct sunlight.
Color-Matched Aesthetic: Offered in popular factory-matching colors to pair seamlessly with your screen frame bars for a clean, uniform look.
Contractor Bulk Packs: Available in convenient quantity options (25, 50, or 100-packs) to give you the exact quantity needed for single-window repairs or high-volume screen shop production.

Product Specifications

Feature	Specification
Material	UV-Stabilized High-Impact Polymer
Joint Type	External Square Cut ( $90^\circ$ Straight-Cut Rail Insert)
Available Pack Sizes	25-Pack, 50-Pack, & 100-Pack
Compatible Frame Sizes	Matches standard 5/16″x3/4″, 5/16″x1″ 3/8″x3/4″, and 7/16″x11/16″ frame profiles
Available Finishes	White, Black, Bronze, Tan, Champagne, & Mill/Gray
Recommended Applications	Custom window screens, storm screen doors, & replacement frame repairs

Ordering & Sizing Tip

Fitment Note: External corners wrap around the outer edges of the frame rail. Be sure to select the corner size that matches your aluminum frame profile thickness (e.g., 5/16″, 3/8″, or 7/16″) before placing your order.

Package Options

25-Pack: Ideal for DIY homeowners repairing or building up to 6 window screens.
50-Pack: Great for mid-sized apartment upgrades or multi-room home renovation projects.
100-Pack: High-value contractor bulk size for commercial screen repair specialists and high-volume builders.

Frequently Asked Questions

What is the difference between internal corners and external square corners?

Internal corner keys require $45^\circ$ mitered frame cuts and are completely hidden inside the frame groove. External square corners allow you to make quick $90^\circ$ straight cuts on your frame rails, as the corner piece wraps visibly around the outer edges of the frame joint.

Do I need screws or adhesive to install these corners?

No. The corner legs are precision-engineered to friction-fit securely into the ends of compatible aluminum frame bars.