Don-Jo ST-386 PC Mortise Lock to ASA Strike Conversion Plate

The Don-Jo ST-386 PC Conversion Plate is a specialized hardware adapter designed to repurpose door openings during complex hardware reconfigurations. This heavy-duty 8-inch conversion plate allows you to transform an existing 8" mortise lock edge prep into a standard 4-7/8" ASA strike prep. This is the ideal solution for "handing" changes or when a door is being flipped and the old lock pocket needs to function as a strike location for a new lockset on the opposing leaf.

By utilizing the ST-386, facility managers and locksmiths can avoid the high cost of door replacement. It provides a clean, structural mounting surface that ensures your new strike plate aligns perfectly with the latch, making it a premier solution for mortise to ASA strike conversion.

Key Features & Performance

• Precision Hardware Adaptation: Converts a standard 8" mortise lock cutout to a 4-7/8" ANSI (ASA) strike preparation in minutes.
  
• Industrial Strength: Manufactured from high-quality steel to provide a rigid, reinforced strike surface that can withstand the repeated impact of commercial latches.
• Professional Grey Primer Finish: Supplied in a Grey Primer (PC) finish, offering a durable base coat that is ready for immediate on-site painting to match your door edge.
• Cost-Effective Retrofitting: Eliminates the need for expensive welding or door patching, providing a "factory-finished" look for commercial door hardware upgrades.
• Universal Commercial Sizing: Measuring 8" x 1-1/4", it fits the most common mortise lock preps found in hollow metal and heavy-duty wood doors.
  

Technical Details & Specifications

• Brand: Don-Jo
• Model Number: ST-386 PC
• Height: 8"
• Width: 1-1/4"
  
• Conversion Type: 8" Mortise Prep to 4-7/8" ASA Strike Prep
  
• Finish: Grey Primer (PC)
• Fasteners: Packaged with two machine screws for secure mounting to existing door reinforcements. For high-traffic or high-security areas, this plate can be reinforced with thru bolts for a permanent, vibration-resistant hold.
  

Why Choose the Don-Jo ST-386?

The Don-Jo ST-386 is a critical component for any commercial door restoration project involving a change in locking functions. When moving from a mortise system to a cylindrical system or changing door swings, you are often left with a large, unusable cavity in the door edge. This mortise lock filler and strike adapter bridges that gap, ensuring your hardware remains code-compliant and secure. For a professional-grade solution for abandoned mortise preps, the ST-386 provides the durability and precision fit that industrial facilities demand.

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