M16 (17.5mm) x 56mm Wood Construction Washer - DIN 440R | Marine Grade A4 Stainless Steel

Product code: W440R-M16-A4
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M16 (17.5mm) x 56mm Wood Construction Washer - DIN 440R | Marine Grade A4 Stainless Steel
M16 (17.5mm) x 56mm Wood Construction Washer - DIN 440R | Marine Grade A4 Stainless Steel
M16 (17.5mm) x 56mm Wood Construction Washer - DIN 440R | Marine Grade A4 Stainless Steel
M16 (17.5mm) x 56mm Wood Construction Washer - DIN 440R | Marine Grade A4 Stainless Steel
M16 (17.5mm) x 56mm Wood Construction Washer - DIN 440R | Marine Grade A4 Stainless Steel
M16 (17.5mm) x 56mm Wood Construction Washer - DIN 440R | Marine Grade A4 Stainless Steel
Quantity
Unit Price
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Unit Price
(inc. VAT)
1 - 99 £1.57 £1.88
100 - 499 £1.43 £1.71
500 - 999 £1.14 £1.37
1000 - 9999 £1.02 £1.23
10000 + £0.96 £1.15

£1.88 / each


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Product Specification
Size M16
Internal Diameter 17.5mm
Outside Diameter 56.0mm
Thickness 5.00mm
Standard DIN 440R
Material A4 Stainless Steel

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M16 Wood Construction Washer - 17.5mm ID x 56mm OD | DIN 440R | A4 Stainless Steel

For coastal fencing, gates and external structures, this structural timber washer supports stronger timber connections by spreading the applied load over a wider area. Its 56.0mm outside diameter provides substantial coverage around the M16 fastening point while the 5.00mm thickness gives the washer a robust section. The A4 marine-grade material is particularly suited to coastal, marine and high-moisture timber applications where enhanced corrosion resistance is required.

What Are Wood Construction Washers?

DIN 440R and DIN 1052 Wood Construction Washers are intended for structural timber fastening where load spreading is important. Their broad round profile helps prevent concentrated clamping force from damaging the timber around the fixing point.

Common Applications

  • Boat Building: A4 Stainless Steel variants provide load spreading around timber fasteners used in suitable marine assemblies.
  • Decking and Pergolas: Helps prevent fasteners sinking into timber as outdoor structures settle or move over time.
  • Agricultural Buildings: Provides reinforced washer support for timber frames, sheds and external structural assemblies.
  • Outdoor Joinery: Provides corrosion-resistant load spreading around bolts and coach screws in external timber work.

M16 DIN 440R Wood Construction Washer Dimensions

  • Size: M16
  • Internal Diameter: 17.5mm
  • Outside Diameter: 56.0mm
  • Thickness: 5.00mm
  • Material: A4 Stainless Steel
  • Standard: DIN 440R

Key Benefits

  • A4 Stainless Steel construction provides corrosion resistance for suitable timber construction applications.
  • Large bearing surface helps reduce local crushing and indentation in softer timber.
  • Round construction-washer format supports stable load distribution across timber connections.
  • 17.5mm internal diameter provides clearance around the compatible bolt or coach screw.

Browse the complete Timber Construction Washers range for alternative internal diameters, outside diameters and stainless steel grades. We can help you choose the right option on 01233 713581.

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