National Marker N197970 Surface Bolt 3 in Polished Brass

Product Description

The NATIONAL MARKER N197970 is a Gallery Series surface bolt designed for securing casement windows and French, twin, or Dutch doors. Constructed from solid brass with a polished brass finish, this 3-inch bolt uses an extra-long throw mechanism held firmly in position by an internal tension spring. The concealed base design protects wood surfaces from marring during installation and daily use. Licensed contractors and finish carpenters install this hardware during new construction or renovation work where positive door or window latching is required.

This surface bolt is suited for residential and light commercial applications involving casement windows and French, twin, or Dutch doors. The included universal and mortise strikes give installers flexibility in how the bolt is secured at its end point. The Gallery Series is available in 2-inch, 3-inch, and 4-inch lengths, allowing selection based on door stile width and throw-distance requirements.

Key Features

• Solid brass construction with polished brass finish for durability and corrosion resistance
• Extra-long throw bolt held in position by tension spring for positive latching
• Concealed base included to protect wood door and window surfaces
• Includes both universal and mortise strikes for flexible installation
• Compatible with casement windows and French, twin, or Dutch doors
• Available in 2-inch, 3-inch, and 4-inch lengths

Compatibility

Designed for use on casement windows and French, twin, or Dutch doors. Includes universal and mortise strikes to accommodate a range of door and frame configurations.

Installation Notes

Installation is typically performed by a finish carpenter or general contractor as part of door or window hardware fitting. Power down any electric locking systems before beginning work. Use appropriate drill bits and chisels for mortise strike installation to avoid splitting door stiles. Follow local building codes for door hardware requirements on egress or fire-rated assemblies.

Technical Specifications

• Bolt Length: 3 inches
• Material: Solid brass
• Finish: Polished brass
• Weight: 0.205 pounds
• Includes: Concealed base, universal strike, mortise strike
• Unit of Measure: Each

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N197970