Square Plate Washers

Square plate washers provide an even larger bearing surface than round washers, making them ideal for use in timber, masonry, and construction applications where the fastener might otherwise pull through a soft or oversized hole. The square profile locks against rotation and gives excellent load distribution.

Available in BZP and HDG finishes in metric sizes M6 to M20, our square plate washers are particularly popular for use with coach bolts, threaded rods, and anchor bolts in structural timber and concrete applications.

  • Sizes: M6, M8, M10, M12, M16, M20
  • Large bearing area for soft materials and oversized holes
  • Finishes: BZP and HDG
  • Ideal for timber, masonry, and structural use

Not sure which finish to choose?

We stock fasteners in three finishes to suit every application. BZP is ideal for indoor and sheltered use. HDG gives heavy-duty protection for outdoor, structural, and timber work. A4 Grade 316 Stainless is the right choice for marine, coastal, and chemical environments. Read our guide to pick the right finish for your project.

Read the finish guide

Same-day dispatch — free delivery over £60

Orders placed before 2pm are dispatched the same working day via tracked courier. Free standard UK delivery on orders over £60. All fasteners are manufactured to DIN and ISO standards in Grade 4.8 and 8.8 steel — competitively priced for trade and domestic buyers, with no minimum order.

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