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Hollow Wall Drywall Anchor Expansion Bolt Set — 6mm / 8mm Carbon Steel | 10–100 Sets
Reliable fixings for hollow walls, plasterboard, gypsum board, and tile where standard wall plugs fail. These carbon steel expansion bolt sets are engineered for cavity wall applications — the expansion tube collapses and grips the back face of the board as the screw is tightened, distributing the load across a wide area and providing a secure anchor even where there is no solid backing. Each set includes one self-tapping screw and one expansion tube, available in 6mm and 8mm sizes with 10 to 100-set packs for single-job through to trade supply.
Specifications
| Material | Carbon Steel |
| Finish | Silver (zinc plated) |
| Sizes Available | 6mm / 8mm / Mixed (6mm + 8mm) |
| 6mm Set Dimensions | Screw: 3.5cm × 6mm | Expansion tube: 3 × 0.7cm |
| 8mm Set Dimensions | Screw: 3.9cm × 8mm | Expansion tube: 3 × 0.7cm |
| Pack Quantities | 10 / 20 / 40 / 100 Sets |
| Contents per Set | 1× Self-tapping screw + 1× Expansion tube |
| Application | Hollow walls, drywall, plasterboard, gypsum board, tile |
| Origin | Mainland China |
How Hollow Wall Anchors Work
- Drill: drill a hole in the hollow wall or tile to match the expansion tube diameter (6mm or 8mm).
- Insert tube: push the expansion tube fully into the hole until the flange sits flush with the wall surface.
- Insert screw: pass the screw through your fixture (shelf bracket, hook, cable clip, etc.) and into the expansion tube.
- Tighten: as the screw is tightened, it draws the expansion tube inward, causing it to collapse and spread behind the wall face — creating a mechanical lock that cannot pull through.
Size Selection Guide
| Size | Drill Bit | Max Load (approx.) | Best For |
|---|---|---|---|
| 6mm | 6mm | 15–25kg (light loads) | Picture frames, cable clips, light shelves, hooks |
| 8mm | 8mm | 25–40kg (medium loads) | Heavier shelves, TV brackets, towel rails, curtain tracks |
| Mixed | 6mm + 8mm | Both | General renovation projects with varied fixing requirements |
Key Features
- ✅ Hollow wall specific design — expands behind the board face for a secure mechanical lock in cavity walls
- ✅ Carbon steel construction — high strength for reliable load-bearing in plasterboard and gypsum board
- ✅ Self-tapping screw included — complete set, no additional hardware required
- ✅ 6mm and 8mm options — covers light to medium load applications
- ✅ 10 to 100-set packs — from single-job to trade and renovation supply
- ✅ Mixed pack available — both sizes in one pack for versatile renovation projects
Common Applications
- Plasterboard and drywall shelf bracket fixing
- Curtain track and blind installation on hollow walls
- Towel rail and bathroom accessory mounting
- Picture and mirror hanging on gypsum board
- Cable management clip fixing on hollow partition walls
- TV wall bracket installation on plasterboard
- Kitchen and bathroom tile fixing for accessories
Frequently Asked Questions
Q: Will these work in ceramic tile over hollow walls?
A: Yes, with a tile drill bit. Drill through the tile first with a carbide or diamond tile bit, then switch to a standard bit for the plasterboard behind. Insert the expansion tube and proceed as normal.
Q: What is the maximum wall thickness these work in?
A: The 3cm expansion tube accommodates standard 12.5mm and 15mm plasterboard. For thicker boards or double-layer plasterboard, verify the tube length against your wall thickness before ordering.
Q: Can I reuse these anchors?
A: No. Once expanded, the tube is permanently deformed. If you need to remove a fixing, the anchor must be replaced with a new set.
Package Contents
- 10 / 20 / 40 / 100× Sets (1 set = 1 self-tapping screw + 1 expansion tube), size as selected


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