L Hook Sleeve Anchor

L Hook Sleeve Anchor

The Duojia “L-Hook Bolt Sleeve Anchor YZP” is a heavy-duty, torque-controlled expansion anchor designed to create a strong, right-angled attachment point in solid base materials like concrete, brick, and block. This fastener combines the proven expansion mechanism of a sleeve anchor with an integrated L-shaped hook, making it ideal for securing items that require a standoff from the wall or a perpendicular support. Manufactured from high-quality carbon steel and finished with a Yellow Zinc Plating (YZP), this anchor provides both excellent holding power and enhanced corrosion resistance for demanding industrial, construction, and infrastructure applications.

Clarification on Anchor Type and Design

It is critical to note that the “roduction to products” and “Instructions for Use” sections on the provided webpage are incorrect, as they describe a Hex Bolt Sleeve Anchor, not the L-Hook Bolt Sleeve Anchor. The following description is based on the actual product name, parameters, and general mechanical principles of an L-Hook sleeve anchor.

  • Anchor Type: This is a sleeve anchor, a pre-assembled fastener that includes a threaded bolt (in this case, an L-Hook bolt), an expansion sleeve, a washer, and a nut.
  • L-Hook Bolt Head: The defining feature is the bolt head, which is bent at a 90-degree angle to form an “L” shape. This design is specifically intended for applications where items need to be hung or supported at a distance from the anchor’s surface, such as securing timber battens, brackets, or conduit.
  • “YZP” (Yellow Zinc Plated): This refers to the anchor’s surface finish. The carbon steel is electro-plated with zinc and then passivated with a yellow chromate conversion coating. This process provides superior corrosion resistance compared to standard white zinc plating, making it suitable for indoor environments where humidity or occasional moisture may be a factor.

Product Mechanism and Installation

The anchor achieves its holding power through the expansion of its sleeve within the base material.

  • Mechanism: The anchor consists of an L-Hook bolt with a tapered cone at its threaded end, an expansion sleeve, a flat washer, and a hex nut. When the hex nut is tightened, it pulls the bolt’s shaft upwards. This action draws the tapered cone into the expansion sleeve, forcing the sleeve to expand outwards and press firmly against the inner walls of the drilled hole, creating a secure frictional lock.
  • Correct Installation Process:
    1. Drill the Hole: Using a carbide-tipped drill bit that matches the anchor’s diameter, drill a hole into the base material (e.g., concrete). The hole depth must be sufficient to accommodate the full length of the anchor sleeve.
    2. Clean the Hole: Thoroughly remove all dust and debris from the drilled hole using a wire brush and compressed air or a hand pump. A clean hole is essential for achieving maximum load capacity.
    3. Insert the Anchor: Insert the complete L-Hook sleeve anchor assembly into the hole until the washer and nut are flush with the surface of the base material.
    4. Orient and Set the Anchor: Before fully tightening, position the L-Hook to the desired orientation (e.g., pointing upwards to support a shelf bracket). Using a wrench, turn the hex nut clockwise. This will expand the sleeve and securely set the anchor. Continue to tighten until the anchor is firm and does not turn in the hole.

Product Parameters

Parameter ItemSpecification Description
Product NameL-Hook Bolt Sleeve Anchor YZP
Brand NameDuojia
Place of OriginHebei, China
MaterialCarbon Steel
Surface TreatmentYellow Zinc Plated (YZP)
Available SizesM6-M20
Strength Grades4.8, 8.8, 10.9, 12.9 (Note: The listed A2/A4 grades refer to stainless steel, which would be a different material option).
Measurement SystemMetric
ApplicationHeavy Industry, General Industry, Construction, Infrastructure
CertificationsISO9001, ISO14001, ISO45001, SGS
Packaging OptionsSmall Pack + Carton + Pallet; Bag/Box with Pallet

Key Features

  • Integrated L-Hook: The 90-degree hook provides a ready-made support point for perpendicular or standoff fastening, eliminating the need for additional brackets.
  • Heavy-Duty Fastening: Designed for high load-bearing capacity in solid masonry and concrete.
  • Enhanced Corrosion Resistance: The Yellow Zinc Plating (YZP) offers durable protection against rust and corrosion in indoor and mild environments.
  • Reliable Expansion Mechanism: The torque-controlled sleeve provides a strong and consistent hold.
  • Pre-Assembled for Convenience: The anchor comes as a complete unit, simplifying handling and speeding up installation.

Common Applications

  • Construction: Securing timber battens to walls for cladding or mounting panels.
  • Mechanical & Electrical: Creating standoff points for running pipes, conduit, or cable trays along walls.
  • Storage and Shelving: Providing support for wall-mounted shelving brackets, tool racks, and storage systems.
  • General Purpose: Anchoring items that need to be spaced away from a concrete or masonry surface.