25 Pack 3/8" x 4" Flat Head Sleeve Anchors, Zinc Plated Carbon Steel Expansion Bolts for Concrete and Brick, Flush Mount Masonry Fastener Kit

Mindoub 3/8" x 4" Flat Head Sleeve Anchors – Reliable Fastening for Commercial and Home Projects The Mindoub sleeve anchor series is designed for precision and strength in masonry applications. The 4-inch model is the go-to choice for projects requiring a shorter embedment depth without sacrificing holding power. It is specifically engineered for securing thin-to-medium fixtures to solid concrete and brick surfaces where a longer bolt is unnecessary. Professional Grade 360° Expansion Our sleeve anchors utilize a full-sleeve expansion mechanism that grips the entire circumference of the pre-drilled hole. This ensures that the stress is distributed evenly, protecting your concrete from cracking while providing a superior mechanical bond that stands up to weight and vibration. Sleek, Flush-Mount Safety Appearance and safety matter. The flat-head (countersunk) design allows the anchor to sit completely level with your fixture. This eliminates protruding hardware that could snag equipment or trip passersby, making these anchors the professional standard for flooring applications, equipment mounting, and safety railing installation. Built for the Long Haul Forged from high-grade carbon steel and protected by an industrial zinc plating, these anchors are built to withstand the rigors of humid environments and professional workspaces. From securing warehouse racks to installing home utility shelving, Mindoub anchors provide the structural peace of mind you need. Important Note: Designed specifically for anchoring TO solid concrete, brick, or stone. Not intended for wood-to-wood or drywall applications.

• 【Efficient Through-Fixing Installation】Engineered with a "hole-size equals bolt-size" design (3/8"), these sleeve anchors allow for direct installation through the fixture and into the substrate. This streamlined process eliminates the need to move equipment or re-align holes, making it an ideal choice for high-volume mounting tasks.
• 【Safety-First Flush Mount Finish】The countersunk flat-head design ensures the anchor sits perfectly flush with the mounting surface once tightened. This low-profile finish is essential for high-traffic areas like workshop floors or walkways, effectively preventing trip hazards while maintaining a professional appearance.
• 【360° Uniform Expansion Grip】Featuring a full-length expansion sleeve, these bolts distribute holding power evenly throughout the hole. This superior load distribution reduces localized stress on the masonry, ensuring a reliable hold in solid concrete, brick, or stone without risking surface cracks or blowouts.
• 【Industrial-Grade Corrosion Resistance】Constructed from high-strength carbon steel with a heavy-duty zinc coating. These fasteners are engineered to resist oxidation and environmental moisture, providing long-term structural integrity for indoor industrial shelving, utility racks, and storage solutions.
• 【Optimized for Metal-to-Concrete Fastening】The 4-inch length is specifically optimized for securing metal brackets, base plates, and thin structural components TO masonry surfaces. Available in 25 and 50-count packs, these anchors offer a professional-grade solution for projects requiring secure, shallow-to-medium embedment depths.