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From the brand Our brand is built for the people who get things done. From professionals on the job site to dedicated DIYers at home, our hardware is designed to solve real problems with strength, reliability, and performance you can count on. Real Hardware. Real Experience. Real Results. Our brand is built for the people who get things done. From professionals on the job site to dedicated DIYers at home, our hardware is designed to solve real problems with strength, reliability, and performance you can count on. Real Hardware. Real Experience. Real Results. Building results you can trust Visit the Store Building results you can trust Visit the Store Gate Hardware Professional‑Grade Gate Hardware for Durable Performance, Reliable Security, and Everyday Builds Gate Hardware Professional‑Grade Gate Hardware for Durable Performance, Reliable Security, and Everyday Builds Door Hardware Trusted Door Hardware for Secure Installation, Smooth Operation, and Everyday Use Door Hardware Trusted Door Hardware for Secure Installation, Smooth Operation, and Everyday Use Wire & Metal Materials High‑Quality Metal and Wire Materials for Fabrication, Structural Support, and Everyday Builds Wire & Metal Materials High‑Quality Metal and Wire Materials for Fabrication, Structural Support, and Everyday Builds From the manufacturer Extensive testing and field use have proven Weatherguard is far superior in corrosion resistance over competitive standard zinc-plated products. Without weatherguard technology products are exposed to harsh weather conditions Rust resistant technology keeps your gate hardware and outdoor hardware stronger longer Superior coating against the elements keeps National Hardware products protected Tested against the competition Weatherguard coating protects against rust When subjected to 312 hours of salt fog spray testing (BHMA A156.18)- 2016, standard zinc hardware showed severe corrosion while hardware protected by Weatherguard withstood these harsh conditions with very little deterioration. Protects against rain damage With a rust resistant coating, products last longer in harsh conditions. Look for the Weatherguard shield on National Hardware products. Keeps your National Hardware products safe in coastal areas Weatherguard helps protect against salt corrosion on zinc plated products. Weatherguard extends the life of products in harsh winter conditions Snow can be hard on outdoor products. Weatherguard's clear coat helps keep products like outdoor hinges safe through the winter. Benefits Protects against humidity Safe to use with pressure treated lumber Superior rust protection Extends the life of outdoor hardware Product Description Transform your home security with the National Hardware N150-771 V820 Chain Bolt, a robust 6-inch door security solution engineered for maximum protection and peace of mind. This premium door lock latch combines traditional reliability with modern manufacturing excellence, creating an essential barrier against unauthorized entry while providing comprehensive door locks protection. Crafted from cold rolled steel and finished with zinc plating, this door chain lock delivers exceptional durability and corrosion resistance. The zinc-plated surface ensures long-lasting performance, making this chain lock for door applications an investment in your home security door lock infrastructure. Whether securing front door locks or adding protection to interior spaces, this door bolt provides reliable performance for all locks for doors needs. Designed specifically for in-swinging doors, this door security latch accommodates both right and left-hand applications, offering versatile installation options. The 6-inch door chain provides optimal security coverage while maintaining convenient operation as an effective latch lock system. Installation is straightforward and user-friendly, requiring basic tools and minimal technical expertise. This door security lock serves as an ideal complement to existing door locks, creating multiple layers of protection that significantly improve your home's overall security profile. The chain door lock mechanism allows you to partially open your door while maintaining a secure barrier, ideal for screening visitors or accepting deliveries safely. This door safety latch gives you complete control over access. National Hardware brings over a century of manufacturing expertise to this door bolt lock, representing a legacy of innovation in door latches and security solutions. This surface bolt integrates seamlessly with standard door configurations while providing professional-grade security locks for doors inside performance. From the Manufacturer SECURITY ENHANCEMENT: This 6 inch zinc-plated chain bolt provides reliable door security for in-swinging doors, featuring cold rolled steel construction that delivers long-lasting durability and protection against unauthorized entry. VERSATILE INSTALLATION: Compatible with both right and left hand door applications, this door lock latch offers flexible mounting options while maintaining consistent performance for enhanced home security door lock needs. DURABLE CONSTRUCTION: Manufactured from premium cold rolled steel with zinc plating finish, this door bolt lock resists corrosion and wear while providing dependable strength for daily use in residential door locks. PRIVACY PROTECTION: Functions as an effective door chain lock that allows controlled door opening for visitor identification while maintaining security, ideal for front door locks and interior door safety latch applications. COMPLETE HARDWARE: Single-pack door security latch includes all necessary mounting components for straightforward installation, designed specifically for in-swinging doors to maximize door security and safety locks for doors. Manufactured from cold rolled steel Use on in-swinging doors only Provides privacy and added security