Hillman One-Way Lag Screws, 5/16-18 x 3in, 50 Pack, Black Phosphate | Heat-treated steel, one-way slotted drive helps deter removal on safes, gates, and restroom fixtures

Descripción

Product Description Hillman heat-treated one-way lag screws are designed for secure fastening in applications where fasteners should not be easily removed once installed. These screws are commonly used in security-sensitive installations such as safes, security gates, public restroom fixtures, institutional hardware, and permanent mounting systems. The one-way slotted drive design allows the screw to be installed using a standard flat-head screwdriver. However, the head is designed so that typical tools cannot easily remove the screw once tightened. This makes the fastener an effective solution for tamper-resistant or vandal-resistant installations. Manufactured from heat-treated Grade 5 steel, these lag screws provide high strength and durability. The heat-treated construction helps prevent the screw from breaking or snapping during installation, even when driven into dense wood or structural materials. For best installation results, it is recommended to drill a pilot hole that matches the screw diameter before driving the lag screw. Pre-drilling helps ensure proper alignment, reduces installation resistance, and minimizes the risk of splitting the material. These lag screws measure 5/16 inch in diameter and 3 inches in length, making them suitable for a variety of structural and security-focused fastening applications. Packaged in a convenient C-Pak containing 50 screws, these fasteners are ideal for contractors, installers, facility maintenance teams, and DIY homeowners working on security installations, permanent fixtures, and tamper-resistant mounting projects. From the Manufacturer One way lag screw, when installed cannot be removed by conventional tools providing security from someone trying to take it apart. Lag Screws are used for directly fastening into wood surfaces. They are used with a lag shield, and lag screws can be used in masonry applications.

Características

• ONE-WAY LAG SCREWS FOR TAMPER-RESISTANT PERMANENT FASTENING: 5/16 in. x 3 in. heat-treated one-way lag screws are engineered for security gates, public restroom fixtures, institutional hardware, and installations requiring tamper resistance.
• ONE-WAY SLOTTED HEAD ALLOWS INSTALLATION BUT RESISTS REMOVAL: Slotted head installs with a standard flat-head screwdriver but prevents easy removal once tightened. Extraction requires a specialized tool, ideal for permanent installations.
• HEAT-TREATED GRADE 5 STEEL FOR HIGH-STRENGTH PERFORMANCE: Heat-treated Grade 5 steel withstands high torque and demanding installation conditions, preventing snapping or breaking during driving into wood and structural materials.
• PRE-DRILLING RECOMMENDED FOR PROPER INSTALLATION: Drill a pilot hole matching the screw diameter before installation to reduce material stress, prevent wood splitting, and ensure smooth, accurate driving into structural wood materials.
• TRUSTED HILLMAN FASTENING SOLUTIONS: Hillman hardware products are engineered for consistent quality, dependable performance, and reliable fastening across construction, repair, and home improvement project applications.

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