Northern Fasteners
M8 Square Plate Washers HDG | 40x40x5mm | Hot Dip Galvanised | Pack of 100
M8 Square Plate Washers HDG | 40x40x5mm | Hot Dip Galvanised | Pack of 100
Couldn't load pickup availability
M8 square plate washers in Hot Dip Galvanised (HDG) mild steel, 5mm thick. Load-spreading washers for outdoor structural fixings into timber, masonry, and soft substrates. 40x40mm, 10mm clearance hole. Pack of 100.
Specifications
- Thread size: M8
- Dimensions: 40mm x 40mm
- Thickness: 5mm
- Hole diameter: 10mm
- Material: mild steel
- Finish: Hot Dip Galvanised (HDG)
- Pack quantity: 100
Suitable for
- External timber and masonry fixings
- Groundworks, fencing, and agricultural applications
- Any outdoor connection requiring load spreading
Frequently asked questions
Do you stock BZP for indoor use?
Yes — see our BZP square plate washers in our square plate washer range. Browse all washers here.
Delivery
Dispatched within 1 working day. Free delivery on orders over £60.
Complete your order
Northern Fasteners stocks everything you need for a complete, matched assembly. Always pair your fasteners with the same finish throughout — BZP with BZP, HDG with HDG, A4 stainless with A4 stainless — for consistent corrosion protection and a professional result. Browse our full range of hex nuts, washers, threaded rods, and bolt and nut sets to find everything you need.
BZP, HDG or A4 Stainless — which finish do you need?
Choosing the right finish is just as important as choosing the right size. BZP is ideal for indoor and sheltered use. HDG provides heavy-duty corrosion protection for outdoor, structural, and timber applications. A4 Grade 316 Stainless is the choice for marine, coastal, and chemical environments where no rust is acceptable. Read our guide to help you decide.
Why buy from Northern Fasteners?
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Same-day dispatch
Orders placed before 2pm are dispatched the same working day via tracked courier.
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Free delivery over £60
Free standard UK delivery on all orders over £60. Tracked and reliable.
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DIN & ISO standards
All fasteners are manufactured to DIN and ISO standards. Grade 4.8 and 8.8 as standard.
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Trade & domestic
Competitive pricing for both trade buyers and domestic projects. No minimum order.
Free delivery over £60 — same-day dispatch
Orders placed before 2pm are dispatched the same working day. Spend over £60 and get free standard UK delivery via tracked courier. All our fasteners are manufactured to DIN and ISO standards — properly graded, reliably finished, and competitively priced for trade and domestic buyers alike.
Also need mild steel?
We stock a full range of structural mild steel sections alongside our fasteners — angle iron, box section, flat bar, tube, round bar, and more. Whether you're building a gate, a frame, or a fabrication project, we have the steel and the fasteners to go with it, all in one order.