Sleeve Anchors 1/4" D x 2-1/4" L w/Acorn Head, Steel (40-PK) - Hillman 370824 The Hillman 370824 1/4-inch diameter steel sleeve anchor is a high-strength, acorn-head anchoring solution engineered for secure fastening into concrete, brick, and hollow block substrates. Designed with a high/low thread profile and a self-expanding sleeve mechanism, it delivers a robust, vibration-resistant hold by expanding radially against the borehole when the nut is tightened ? creating a permanent, load-bearing connection. The acorn head provides a clean, finished appearance while eliminating the need for washers or additional hardware. Each anchor includes a matching steel screw for complete installation. Rated for a 240 lb shear capacity, it is ideal for mounting frames, machinery, electrical boxes, handrails, and other structural components in masonry applications. Features - Steel construction with zinc plating resists corrosion in dry and moderately damp environments - High/low thread design enhances grip and torque transfer for maximum holding power - Acorn head finish provides a smooth, professional appearance without protruding hardware - Expands inside the drilled hole when nut is tightened ? creates a secure, non-rotating anchor - Compatible with concrete, solid brick, and hollow block substrates - Minimum embedment depth of 1-1/8 in ensures optimal load performance - Requires 1/4 in diameter drill hole ? matches standard masonry bit size - Includes pre-threaded steel screw for one-piece installation - No additional washers or nuts required ? fully integrated design - Meets industry standards for structural anchoring in masonry applications - Packaged in bulk 40-count box for job-site efficiency and inventory control Specifications - Brand Name: Hillman - Model Name: Hillman 370824 - Product Type: Sleeve Anchor - Material: Steel with Zinc Plating - Diameter: 1/4 in - Length: 2-1/4 in - Head Style: Hex - Thread Type: High/Low - Minimum Embedment Depth: 1-1/8 in - Required Drill Hole Size: 1/4 in - Shear Capacity: 240 lb - Screw Included: Yes - Quantity: 40 pcs per pack - Weight: 1.3 lb per pack - Packaging: Boxed - Country of Origin: United States - UPC: 008236561500 - GTIN: 00008236561500 - Manufacturer: Hillman Group RSC Product Application The Hillman 370824 sleeve anchor is used by contractors, electricians, plumbers, and general builders installing fixtures, frames, conduits, and equipment into concrete, brick, or block walls and floors. Common applications include mounting electrical panels, HVAC units, handrails, door frames, and shelving brackets where a permanent, high-strength anchor is required. Its acorn head design offers a finished look in visible applications, while its expansion mechanism ensures reliable performance even in older or brittle masonry. Professionals trust its consistent load capacity and ease of installation to deliver code-compliant, long-lasting connections ? providing the confidence that critical attachments remain secure under load, vibration, and environmental stress.