Buy Masonry Screw Anchors Online in Australia
Masonry Screw Anchor Selection — Quick Reference
Masonry screw anchors thread DIRECTLY into pre-drilled pilot holes in concrete + brick + block — no separate expansion anchor required. Fast + reliable fastening + REMOVABLE for maintenance. Stocked at AIMS from Hobson and Bremick. Pilot bit included or matched separately.
| Anchor Type | Best For | Head Type |
|---|---|---|
| Hex Head Masonry Screw | Bolted-through fixings + structural — driven with socket | Hex head + flange |
| Countersunk Phillips Head | Flush finish + lighter-load applications | Phillips countersunk |
| Pan / Wafer Head | Surface-mount + clamping applications | Pan or wafer + Phillips |
| 3/16" (4.7mm) Body | Light fixings — bracketry + signs + light load | Up to ~70 kg pull-out |
| 1/4" (6.3mm) Body | Medium fixings — fittings + brackets + light structural | Up to ~225 kg pull-out |
| Pilot Bit (Per Screw Size) | 3/16" = 5mm pilot / 1/4" = 5.5-6mm pilot | Carbide-tipped masonry bit |
| Stainless 304 Body | Outdoor + corrosion resistance | Per type |
| Stainless 316 Body | Marine + chloride + heavy corrosion | Per type |
| Zinc-Plated Standard | Indoor + dry service | Workshop default |
Installation: 1) Drill pilot hole with carbide bit MATCHED to screw size — too small = screw breaks; too large = no thread engagement. 2) Clear hole of dust (blow + vacuum). 3) Drive screw with impact driver — screw cuts its own thread in masonry. Re-use: can be removed + reinstalled in same hole multiple times — maintenance-friendly. Brands: Hobson, Bremick. Companion: all anchors, fasteners, masonry drill bits.
Masonry Screw Anchors — Direct-Fix Concrete & Masonry Screws
Masonry screw anchors thread directly into a pre-drilled pilot hole in concrete, brick, and block — providing a fast, reliable fastening point without a separate expansion anchor component. AIMS Industrial sells masonry screw anchors in hex head and countersunk profiles, zinc-plated and stainless steel, for direct fixing of structural brackets, service supports, and mechanical equipment to concrete and masonry substrates.
Masonry Screw Anchors We Stock
- Hex Head Masonry Screws: Hex head masonry screw anchors for structural bracket, post base, and fixture fastening into concrete and brick — the hex head allows installation with a socket or spanner and provides visual verification that the anchor is fully seated.
- Countersunk Masonry Screws: Countersunk masonry screw anchors for flush surface mounting where a protruding hex head is not acceptable — floor rails, track mounting, and architectural fixings.
- Zinc-Plated Masonry Screws: Zinc-plated masonry screws for interior and protected structural fixing — appropriate for indoor construction, interior fit-out, and industrial buildings not subject to direct water exposure.
- Stainless Steel Masonry Screws: 316 stainless steel masonry screw anchors for coastal, marine, food processing, and outdoor applications where zinc-plated anchors would corrode. Required for fixing into concrete within marine splash zones and NATA corrosion category C3 and above.
Masonry Screw Anchor Selection & Installation Guide
- Pilot Hole Diameter: Masonry screws require a specific pilot hole diameter in the substrate — typically the screw major diameter minus 1mm. An oversized pilot hole reduces thread engagement and anchor capacity; undersized pilot holes cause screw installation difficulty or breakage.
- Minimum Edge and Spacing Distances: AS 3600 and anchor manufacturer datasheets specify minimum edge distance and anchor spacing for concrete and masonry substrates — these must be respected to achieve the rated anchor capacity. Anchors installed too close to edges or other anchors have reduced pullout and shear capacity.
- Substrate Condition: Masonry screw anchors require a minimum compressive strength substrate (typically 20–25 MPa for concrete) and must not be installed in cracked concrete or deteriorated masonry. Check the substrate condition and consult the manufacturer's technical data sheet for critical applications.
Australian Business, Local Supply: As a proudly Australian business since 1988, we stock locally and work with trusted local Australian manufacturers and distributors to ensure fast, reliable supply.
Expert Support: Need help buying the right product for your application? Contact our team for application-specific advice or request a quote.
See our full fasteners range including drop-in anchors, hex nut and sleeve anchors, and construction hardware.
People Also Ask — Masonry Screw Anchors
Q: What happens if I drill the wrong pilot hole size for a masonry screw anchor?
Masonry screw anchors rely on a matched pilot hole size to grip properly — drill it too small and the anchor won't drive in fully or may snap; drill it too large and the threads won't bite into the masonry, so the anchor pulls out under load instead of holding. Always drill to the exact pilot size stated for that anchor diameter.
Q: Do I need stainless steel masonry screw anchors, or is zinc-plated enough?
For general indoor use, zinc-plated is usually adequate. For outdoor exposure, marine or coastal environments, or washdown areas, step up to 304 or 316 stainless — 316 specifically where there's ongoing saltwater or heavy washdown exposure, since corrosion at the anchor point compromises the whole fixing.
Q: What edge distance and spacing does AS 3600 require for masonry anchors?
AS 3600 governs edge distance and spacing requirements for anchors in concrete, but the exact figures depend on anchor diameter, embedment depth, and the specific installation. For the numbers that apply to your anchor size, check the manufacturer's technical data sheet rather than relying on a general rule of thumb — undersized edge distance is a common cause of concrete spalling and anchor failure.
Q: Will a masonry screw anchor hold in low-strength or cracked concrete?
No — masonry screw anchors need a minimum concrete strength (typically 20-25 MPa) to develop their full holding capacity, and they shouldn't be installed into cracked or deteriorated masonry at all. If you're not sure of the substrate condition or strength, that's worth checking before you commit to an anchor point.
Q: How much pull-out load can a masonry screw anchor handle?
Pull-out capacity scales with anchor diameter — as a rough guide, a 3/16" masonry screw anchor holds around 70kg, stepping up to around 225kg for a 1/4" anchor. These are general figures; always check the specific anchor's rated load for your exact application rather than assuming.