Don-Jo AST-21381 Security Strike – 1-3/8" x 18", 13 Gauge, Silver Lacquer / Bright Brass / White

The Don-Jo AST-21381 is a heavy-duty security strike engineered to reinforce the strike area of a commercial or residential door against forced entry at the latch or deadbolt point. Manufactured by Don-Jo Manufacturing from ferrous steel at a robust 13 gauge (.095"), this security strike measures 1-3/8" wide by 18" tall and covers a full length of door edge jamb, distributing impact load across multiple fastener points rather than concentrating stress at a single strike cup. A single latch hole accommodates a key-in-knob or single deadbolt prep, making it the correct choice when one lockset needs fortified backing without a second cutout. Available in three finishes — silver lacquer (SL), bright brass (BP), and white (WH) — the AST-21381 coordinates with a wide range of door hardware finishes on both hollow-metal and wood-frame doors.

AST-21381 Security Strike Features

• Heavy-Gauge Ferrous Steel: Formed at 13 ga. (.095") for a rigid, high-resistance barrier at the strike zone — substantially thicker than light-duty economy strikes.
• Full 18" Protective Height: The 18" length spreads fastener anchoring across the full strike area, reducing the chance of frame splitting or strike pull-through under impact.
• Single Latch Hole Configuration: Sized and cut for one latch or deadbolt — ideal for key-in-knob locksets or single-cylinder deadbolt applications where a clean, uncluttered strike plate is required.
• Three Finish Options: Silver lacquer, bright brass, and white finishes allow the security strike to blend with existing door hardware and frame color without requiring a custom finish order.
• Consistent Quality Packaging: Shelf-packed in quantities of 10, supporting contractor and distributor stocking needs for multi-door projects.

Technical Details

How to Order

Select the finish — silver lacquer (SL), bright brass (BP), or white (WH) — from the options above. The Don-Jo AST-21381 is a non-stock item that ships directly from Don-Jo Manufacturing; please allow 3–10 business days for shipment after order placement.

Ordering & Lead Time

Non-stock, ships from Don-Jo. Lead time: 3-10 business days.