Hobson warranty
Self-Drilling Screw Corrosion Warranty: Years by Environment and Finish
Hobson's seven-page corrosion resistance and structural integrity warranty for self drilling screws, effective from September 2025. It sets warranty periods by ISO 9223 corrosivity category for each screw finish, and covers what is and is not covered, maintenance and how claims work. This version states the warranty applies only in Australia.
What this covers
- Products covered
- Warranty periods by environment
- Australian Consumer Law
- What is not covered
- Maintenance
- Making a claim
Applies to Chipboard Screw, Needle Point Screw, Plasterboard Screw, Roofing & Cladding Screws, Tek Screws (Self-Drilling Metal Screws), Stitching Screw and Type 17 Screws (Batten & Decking Screws).
Key things to remember
The essentials from this document in plain words. Check the full document before you rely on a figure.
- Covers Hobson self drilling screws in Class 3, Class 4, X9 ProteXion, 304 Bi-Metal and 316 Bi-Metal. It warrants that the screws will not lose structural integrity through natural corrosion during the warranty period, counted from the date of purchase.
- Warranty years by ISO 9223 category (Class 3 / Class 4 / X9 / 304 Bi-Fix / 316 Bi-Fix): C2 urban or inland 20 / 25 / 30 / 35 / 40; C3 moderate marine or industrial 10 / 20 / 25 / 25 / 30; C4 severe marine or industrial not recommended / 15 / 20 / 20 / 25.
- C5 very severe marine or industrial: 316 Bi-Fix 15 years; Class 3, Class 4, X9 and 304 Bi-Fix are not recommended. CX (extreme) sites are not covered unless suitability was confirmed in writing before purchase. On a category boundary, the higher category applies.
- It covers structural integrity only, not looks: staining, discolouration, coating dulling and paint wear are excluded. Unless the cause is a manufacturing defect, it covers the exposed head and washer only, not the threaded shank. Consumer rights under the Australian Consumer Law still apply.
- Remedy is replacement or equivalent screws delivered to site; removal, labour and reinstallation are not covered.
- Not covered: installation against the written instructions (including not using a screw gun at the recommended RPM), over-tightening, contact with incompatible materials, missing maintenance, and storms, fire, sand or vandalism.
- Maintenance: wash the fasteners and nearby surfaces with fresh water at least every 6 months in C2 to C3 environments and at least every 3 months in C4 to C5, or when contamination builds up. Non-consumer claims should be made in writing within 90 days of noticing the defect.
Who it helps: Builders, roofers and specifiers choosing a screw finish for a coastal, industrial or inland site, and owners planning maintenance.
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