Don-Jo AST-21386 Security Strike – 1-3/8" x 18", 13 Gauge, Two Latch Holes

The Don-Jo AST-21386 Security Strike is a heavy-duty security strike engineered to reinforce the strike pocket on commercial and residential door frames where a standard box strike simply is not enough. Don-Jo Manufacturing produces this plate from 13-gauge (.095) ferrous steel, delivering the rigid, deflection-resistant backbone that security-conscious installers and facility managers demand. Measuring a full 1-3/8" wide by 18" tall, the AST-21386 covers an extended run of door frame, protecting the jamb from forced-entry attacks across the entire latch zone. The plate is drilled for two latch holes on 5-1/2" or 6" centers, making it a direct-fit security strike upgrade for a wide variety of commercial cylindrical locksets and deadbolts already installed in the field. Available in three finish options — silver lacquer (SL), bright brass (BP), and white (WH) — the AST-21386 can be matched to the surrounding door hardware for a clean, professional appearance without sacrificing protection.

AST-21386 Security Strike Features

• Heavy-Gauge Steel Construction: Formed from 13-gauge (.095) ferrous steel for maximum frame reinforcement and resistance to strike-area deformation.
• Extended 18" Coverage: The 18" plate height protects a broad section of the door jamb, spreading forced-entry load far beyond what a standard strike plate covers.
• Dual Latch Hole Configuration: Two pre-cut latch holes accommodate both the primary latch and deadlatch (or deadbolt) on 5-1/2" or 6" centers, fitting common commercial and residential lockset preparations.
• 1-3/8" Plate Width: Precisely sized to seat flush in standard door frame strike preps without requiring frame modification.
• Three Finish Options: Silver lacquer (SL), bright brass (BP), and white (WH) finishes let specifiers coordinate the security strike with existing door hardware and frame color.
• Ferrous Steel Material: Steel construction ensures the security strike stays rigid under lateral and shear loading at the frame pocket.
• Shelf Pack of 10: Packaged in quantities of 10, convenient for locksmiths, contractors, and facility maintenance teams stocking multiple openings.

Technical Details

How to Order

Select the finish — silver lacquer (SL), bright brass (BP), or white (WH) — at the time of order. The Don-Jo AST-21386 is a non-stock item that ships direct from Don-Jo Manufacturing. Please allow 3–10 business days lead time for shipment.