1. Introduction
This manual provides detailed instructions for the proper use, installation, and maintenance of your Marhynchus 20-Piece 5x30mm Zinc Plated Hanger Bolts. These hanger bolts are designed for creating strong, concealed joints in wood applications, commonly used in furniture assembly and other woodworking projects. Please read this manual thoroughly before use to ensure safe and effective application.
2. Safety Information
- Always wear appropriate personal protective equipment, such as safety glasses, when working with tools and fasteners.
- Keep hanger bolts out of reach of children and pets.
- Handle bolts carefully as they have sharp points and threads.
- Ensure the work area is well-lit and clear of obstructions.
- Use the correct tools for installation to prevent damage to the bolts or injury.
- Do not overtighten bolts, as this can strip threads or damage the material.
3. Package Contents
Your package should contain the following items:
- 20 x Marhynchus 5x30mm Zinc Plated Hanger Bolts

Image: A pile of twenty Marhynchus 5x30mm zinc plated hanger bolts, clearly showing the '20 pcs' label, indicating the quantity included in the package.
4. Setup and Installation
Marhynchus hanger bolts are designed for secure fastening in wood. Follow these steps for proper installation:
- Prepare the Wood: Identify the two pieces of wood you wish to join. Mark the precise location for the hanger bolt on both pieces.
- Drill Pilot Hole: For the wood-thread end of the hanger bolt, drill a pilot hole into the first piece of wood. The pilot hole diameter should be slightly smaller than the core diameter of the wood-thread section of the bolt to ensure a tight grip. A common recommendation is to use a drill bit that matches the bolt's minor diameter.
- Insert Hanger Bolt: Using a hanger bolt driver or by double-nutting (threading two nuts onto the machine-thread end and tightening them against each other to create a driving surface), screw the wood-thread end of the hanger bolt into the pre-drilled pilot hole until the unthreaded shank is flush with the wood surface.
- Attach Second Piece: Align the second piece of wood (or component) with the exposed machine-thread end of the hanger bolt. If the second piece is wood, it may also require a pilot hole for the machine-thread section to pass through, or a larger clearance hole if it's being secured with a nut.
- Secure Connection: If using a nut and washer, place the washer over the machine-thread end and then thread the nut onto the bolt, tightening it until the connection is secure. If screwing directly into the machine-thread end, ensure the mating component has a compatible internal thread.

Image: Two Marhynchus hanger bolts are shown on a wooden workbench, surrounded by common woodworking tools like a drill and protective gloves, demonstrating the context of their use in assembly.
5. Maintenance
Marhynchus hanger bolts are designed for durability with a zinc-plated finish. To ensure their longevity and performance:
- Storage: Store unused bolts in a dry environment to prevent corrosion. Keep them in their original packaging or a sealed container.
- Inspection: Before use, inspect each bolt for any signs of damage, bending, or significant corrosion. Do not use damaged bolts.
- Cleaning: If bolts become dirty, wipe them with a dry cloth. Avoid abrasive cleaners or harsh chemicals that could damage the zinc plating.
6. Troubleshooting
- Difficulty Inserting Wood-Thread End: Ensure the pilot hole is of the correct diameter. If the pilot hole is too small, it will be difficult to insert and could split the wood. If too large, the bolt will not hold securely.
- Stripped Threads: If the wood threads strip during insertion, the pilot hole may be too large, or the bolt was overtightened. Remove the bolt, fill the hole with wood filler, and redrill a new pilot hole after the filler has cured, or use a larger diameter hanger bolt if appropriate.
- Bolt Not Holding Securely: This often indicates an incorrect pilot hole size (too large) or insufficient depth. Ensure the wood-thread section is fully engaged in the wood.
7. Specifications
| Brand | Marhynchus |
| Material | Iron |
| Surface Treatment | Zinc Plated |
| Thread Diameter | 5 mm |
| Total Length | 30 mm |
| Quantity | 20 pieces |
| ASIN | B07RLWJL71 |
| UPC | 750086276256 |

Image: A close-up view of two Marhynchus hanger bolts, with clear annotations showing their dimensions: 5mm (0.19 inches) for the thread diameter and 30mm (1.17 inches) for the total length.
8. Customer Support
If you encounter any quality problems or have concerns regarding your Marhynchus hanger bolts, please do not hesitate to contact our customer service. We are committed to resolving any issues you may experience to ensure your satisfaction.
For support, please refer to the contact information provided with your purchase or visit the official Marhynchus store page on Amazon.





