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The NATIONAL MARKER N152133 is an 8-inch extra heavy-duty door barrel bolt finished in black, designed to provide reliable mechanical security on high-traffic and heavy-use closures. This surface-mounted slide bolt suits farm buildings, sheds, stockrooms, and other demanding installations where a simple but robust locking mechanism is needed. The bolt accepts a padlock for added protection and can be installed with carriage bolts to resist forced entry. Both surface and universal strikes are included in the package, making this a complete hardware solution for a wide range of door types.
This barrel bolt is intended for residential, agricultural, and light commercial applications where a durable, straightforward locking device is required. Typical installations include barn doors, shed entries, stockroom doors, and storage enclosures. The extra heavy-duty construction makes it appropriate for locations subject to frequent use or environmental exposure. It is sold individually and ships as a single unit with all necessary strike hardware included.
Designed as a surface-mount barrel bolt suitable for wood and compatible door types in agricultural, residential, and light commercial settings where heavy-duty slide bolt hardware is required.
Installation is typically performed by a general contractor, carpenter, or qualified handyman using standard hand tools. Before mounting, confirm the door and frame are structurally sound and capable of supporting the hardware. When using carriage bolts for increased security, drill appropriately sized through-holes and secure with washers and nuts on the reverse side. Follow all applicable local building codes for door hardware in the intended environment.
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