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Metal Expansion Screws & Anchor Bolts | Carbon Steel 20–100 Sets
Metal Expansion Screws & Anchor Bolts | Carbon Steel 20–100 Sets
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Metal Expansion Screws & Anchor Bolts – Carbon Steel Fasteners for Concrete & Masonry
Built for professionals and DIY enthusiasts alike, these metal expansion tube screws deliver rock-solid anchoring in concrete, brick, drywall, and masonry surfaces. Made from durable plain carbon steel, each set pairs a self-tapping screw with a matching expansion tube to create a reliable, load-bearing fastening point — no specialist tools required.
Why Choose These Expansion Screws?
- High-Strength Carbon Steel: Engineered for long-lasting performance in demanding construction and renovation environments.
- Self-Tapping Design: The tapered screw thread cuts into the expansion tube automatically as you drive it, locking the anchor firmly in place.
- Versatile Sizing: Available in 8mm and 10mm to suit a wide range of wall thicknesses and fixing requirements.
- Bulk Value Packs: Choose from 20, 50, or 100 sets — ideal for small repairs, large renovation projects, or keeping workshop stock well stocked.
- Wide Application: Perfect for securing shelving, fixtures, electrical conduit, frames, and general home or room decoration anchoring.
- Lightweight & Easy to Handle: Compact form factor makes installation quick and straightforward, even in tight spaces.
Product Specifications
| Material | Plain Carbon Steel (Iron) |
| Sizes Available | 8mm / 10mm |
| Screw Type | Self-Tapping Expansion Screw |
| Package Options | 20 Sets, 50 Sets, or 100 Sets (screws + expansion tubes) |
| Suitable For | Concrete, Brick, Masonry, Drywall, Home & Room Decoration |
| Country of Origin | Made in China |
What's Included
- 20-Set Pack: 20 × Self-Tapping Screws + 20 × Expansion Tubes
- 50-Set Pack: 50 × Self-Tapping Screws + 50 × Expansion Tubes
- 100-Set Pack: 100 × Self-Tapping Screws + 100 × Expansion Tubes
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For general guidelines on safe fastening and construction practices, visit the U.S. Consumer Product Safety Commission (CPSC).
Learn more: Autoclaved aerated concrete
Frequently Asked Questions
Q: What surfaces are these metal expansion screws suitable for?
A: These carbon steel expansion screws are designed for use in concrete, brick, masonry, and drywall surfaces. They are ideal for securing shelves, fixtures, conduit, frames, and general home decoration fastenings in both indoor and outdoor settings.
Q: What is the difference between the 8mm and 10mm sizes?
A: The size refers to the diameter of the expansion tube and drill hole required. 8mm anchors are suited to lighter fixtures and thinner walls, while 10mm anchors provide greater holding strength for heavier loads and thicker concrete or masonry.
Q: How do I install these self-tapping expansion screws?
A: Drill a hole in the wall matching the tube diameter (8mm or 10mm), insert the expansion tube flush with the surface, align your fixture, and drive the self-tapping screw through. As the screw is tightened, the tube expands outward to grip the surrounding material securely.
Q: Are these screws suitable for outdoor use?
A: These screws are made from plain carbon steel. For prolonged outdoor or high-moisture environments, we recommend applying a protective coating or using them in sheltered locations to maintain longevity.
