National Marker N183590 Steel Chain Door Lock

Product Description

The NATIONAL MARKER N183590 is a steel chain door lock designed to secure entry doors while allowing controlled partial opening. This economical fastener mounts to the door and door frame, enabling occupants to screen visitors without fully releasing the latch. The unit is constructed from steel for reliable everyday use and ships one per pack. It suits residential installations in houses and apartments where a simple, low-cost security solution is needed. Installation requires only basic hand tools and minimal hardware.

This chain door fastener is intended for residential applications including single-family homes and apartment units. It functions as a secondary security measure on hinged entry doors, allowing the door to open a few inches so an occupant can verify who is outside before granting full access. The part corresponds to National catalog model V807.

Key Features

• Steel construction provides durable, corrosion-resistant performance for interior door applications
• Allows door to open partially for controlled visitor screening without releasing the full latch
• Economical design suited for high-volume residential installations
• Sold individually, one unit per pack
• Compact and lightweight at 0.31 pounds per pack

Compatibility

Designed as a standard residential chain door fastener suitable for typical hinged interior and entry doors in houses and apartments.

Installation Notes

Installation is performed by a general contractor, handyman, or knowledgeable property maintenance technician using basic hand tools including a drill and screwdriver. The door and frame must be solid enough to accept the mounting screws securely. Ensure the door is closed and no load is on the chain before fastening hardware. Follow local building codes regarding secondary security devices on egress doors.

Technical Specifications

• Material: Steel
• Weight: 0.31 pounds
• Unit of Measure: Pack
• Minimum Order Quantity: 1
• UPC: 00038613183599

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N183590