National Marker N152121 5 in Heavy Duty Door Barrel Bolt

Product Description

The NATIONAL MARKER N152121 is a heavy-duty surface-mount barrel bolt designed for securing doors on farm buildings, sheds, stockrooms, and other demanding applications. Built for extra heavy-duty use, this bolt provides a straightforward sliding latch mechanism that adds a reliable layer of physical security to hinged doors and gates. It accepts a padlock for enhanced lockout capability, making it practical for facilities requiring controlled access. Licensed tradespeople and property maintenance professionals typically specify this hardware for agricultural and light commercial installations where robust door security is required.

This barrel bolt is suited for surface-mount installation on interior and exterior doors in residential, agricultural, and light commercial settings. Typical applications include barn doors, shed entries, stockroom access points, and utility enclosures. The included surface and universal strikes expand fitment options across a range of door frame profiles. Mounting with carriage bolts is supported for increased tamper resistance in high-traffic or higher-security environments.

Key Features

• Extra heavy-duty construction rated for demanding farm, shed, and stockroom door applications
• Accepts a padlock for secondary lockout or restricted-access control
• Compatible with carriage bolt mounting for added tamper resistance
• Includes both surface strike and universal strike for flexible frame fitment
• Surface-mount design simplifies installation on existing door assemblies

Compatibility

Designed as an OEM-style replacement or direct-install barrel bolt for heavy-duty door hardware applications on farm buildings, sheds, and stockroom doors as noted in National Catalog Model V832.

Installation Notes

Installation is typically performed by general contractors, maintenance technicians, or experienced DIYers using standard hand tools. Secure the bolt body and strike plate firmly to the door and frame using appropriately sized fasteners; carriage bolts are recommended where higher security is needed. Ensure the door is properly aligned before marking and drilling fastener holes to achieve smooth bolt travel. No electrical shutoff or specialty trade licensing is required for standard mechanical hardware installation.

Technical Specifications

• Length: 5 inches
• Weight: 1.35 pounds
• Duty Rating: Extra Heavy Duty
• Strike Types Included: Surface strike and universal strike
• UPC: 00886780005233

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N152121