National Mfg N151-621 4 Inch Black Barrel Bolt Security Latch

Product Description

The NATIONAL MFG/SPECTRUM BRANDS HHI N151-621 is a 4-inch black barrel bolt designed to provide basic security on lightweight doors, chests, cabinets, and similar enclosures. The bolt slides into a strike receiver to hold a door or panel closed, offering a simple mechanical latching solution without a keyed lock. This hardware is suited for residential and light commercial applications where quick, tool-free operation is needed. The black finish blends with standard hardware in utility and storage settings. Licensed contractors, carpenters, and knowledgeable DIYers install this type of hardware as part of cabinet builds, shed doors, and interior panel applications.

This barrel bolt is appropriate for lightweight interior and exterior doors, wooden chests, storage cabinets, and similar enclosures where a slide-bolt latch provides adequate security. The design supports both right-hand and left-hand installations, making it adaptable to a range of door swing configurations without requiring additional hardware. When mounted vertically, a notch in the case holds the bolt in the locked position, preventing unintended retraction. This package contains 10 units, making it suitable for multi-door or multi-cabinet installations.

Key Features

• 4-inch barrel bolt length provides secure latching on lightweight doors and enclosures
• Compatible with right-hand and left-hand installations for flexible mounting
• Notch in the case retains bolt in the locked position during vertical installation
• Black finish suits utility, storage, and general interior applications
• Package of 10 units supports multi-unit projects
• Carded packaging for retail or jobsite organization

Compatibility

Designed as an OEM-style replacement or new-install barrel bolt for lightweight doors, wooden chests, cabinets, and similar enclosures requiring basic slide-bolt security.

Installation Notes

Installation is typically performed by carpenters, finish contractors, or knowledgeable DIYers using standard hand tools such as a drill and screwdriver. Mount the bolt body to the door or panel face, and position the strike plate on the door frame or adjacent surface so the bolt seats fully when engaged. Before drilling pilot holes, verify door alignment to ensure smooth bolt travel. In vertical orientations, confirm the notch engages the bolt correctly to prevent unintended release.