Don-Jo AST-21346 Security Strike — 1-3/4" x 18", 13 Gauge, Double Latch Hole, Three Finish Options

The Don-Jo AST-21346 Security Strike is a heavy-duty, 13-gauge (.095) ferrous steel security strike measuring 1-3/4" wide by 18" tall — engineered to reinforce the door frame strike zone on commercial and institutional doors where a standard-depth strike plate offers insufficient protection. Manufactured by Don-Jo Manufacturing, a trusted name in commercial door hardware, this security strike features two latch holes positioned on 5-1/2" or 6" centers, making it a direct-fit solution for double-latch or double-bolt door preps common in schools, healthcare facilities, multi-family housing, and light-commercial construction. Its full 18-inch length distributes door-force loads across multiple frame studs rather than concentrating stress at a single point. Available in three finishes — silver lacquer (Don-Jo SL), bright brass (Don-Jo BP), and white (Don-Jo WH) — the AST-21346 allows coordinators and specifiers to match existing frame hardware or architectural finish schedules without sacrificing structural integrity.

AST-21346 Security Strike — Key Features

• Heavy-Gauge Construction: Formed from 13 ga. (.095) ferrous steel, providing robust frame reinforcement well beyond standard strike-plate thickness.
• Full 18" Coverage: The extended 18-inch height spans multiple frame members, spreading door-force loads over a wider surface area for added frame integrity.
• Double Latch Hole Pattern: Two latch holes on 5-1/2" or 6" centers accommodate double-latch and double-bolt door preps on common commercial door frames.
• Three Finish Choices: Available in silver lacquer (SL), bright brass (BP), and white (WH) to coordinate with a variety of frame finishes and design specifications.
• Compact Profile Width: At 1-3/4" wide, the AST-21346 fits neatly into standard commercial door frame strike-area routing without requiring frame modification.
• Contractor-Friendly Pack Quantity: Sold individually; shelf pack of 10 supports project-quantity purchasing for new construction and renovation contracts.

Technical Details

How to Specify / Order

Order by specifying the model number and finish designation: AST-21346 SL (silver lacquer), AST-21346 BP (bright brass), or AST-21346 WH (white). This security strike is a non-stock item that ships direct from Don-Jo Manufacturing. Please allow 3–10 business days lead time when planning project schedules.