M12 Penny Washer (Large) 13.0mm ID x 30.0mm OD - A4 Stainless Steel

Product code: WPE-M12-30-A4
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M12 Penny Washer (Large) 13.0mm ID x 30.0mm OD - A4 Stainless Steel
M12 Penny Washer (Large) 13.0mm ID x 30.0mm OD - A4 Stainless Steel
M12 Penny Washer (Large) 13.0mm ID x 30.0mm OD - A4 Stainless Steel
M12 Penny Washer (Large) 13.0mm ID x 30.0mm OD - A4 Stainless Steel
M12 Penny Washer (Large) 13.0mm ID x 30.0mm OD - A4 Stainless Steel
M12 Penny Washer (Large) 13.0mm ID x 30.0mm OD - A4 Stainless Steel
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Unit Price
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1 - 99 £0.16 £0.19
100 - 999 £0.13 £0.16
1000 - 3999 £0.12 £0.14
4000 + £0.09 £0.11

£0.19 / each


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Product Specification
Size M12
Internal Diameter 13.0mm
Outside Diameter 30.0mm
Thickness 1.50mm
Material A4 Stainless Steel

Next Day or Standard Delivery available via DHL or Royal Mail.
Order by 4pm (UK) for same day dispatch, Monday to Thursday or 2pm Friday.

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M12 Penny Washer - 13mm ID x 30mm OD | A4 Stainless Steel

Manufactured for marine-grade maintenance and repair, this M12 Stainless Steel Repair Washer measures 30.0mm across the outside with a 13.0mm internal diameter. Its wide flat profile increases the contact area around the fixing which is useful on timber, plastics and thin sheet materials.

What Are Stainless Steel Penny Washers?

Also known as repair washers, Stainless Steel Penny Washers sit beneath bolts, machine screws or nuts to enlarge the load-bearing surface of the joint. This can help prevent fastener heads or nuts from digging into the material or pulling through it.

Common Applications

  • Timber and Woodwork: Spreads clamping pressure around bolts and screws to help protect softer timber fibres from localised crushing.
  • Construction: Used with bolts and nuts in fabricated frames, brackets, fixings and general building assemblies.
  • Machinery Maintenance: Provides a broad replacement washer for suitable bolts and machine screws on industrial equipment.
  • Marine Equipment: A4 variants suit compatible marine and coastal assemblies where increased corrosion resistance is required.

M12 x 30mm Stainless Steel Penny Washer Dimensions

  • Size: M12
  • Internal Diameter: 13.0mm
  • Outside Diameter: 30.0mm
  • Thickness: 1.50mm
  • Material: A4 Stainless Steel

Key Benefits

  • 1.50mm thickness provides the specified washer profile for this size.
  • Can help reduce the risk of fastener pull-through around oversized or weakened fixing holes.
  • Manufactured to BS 4320 as part of the Stainless Steel Penny Washer range.
  • The wider range includes A2 and A4 Stainless Steel options across multiple metric sizes and outside diameters.

View the full Stainless Steel Penny Washers range to compare metric sizes, outside diameters and A2 or A4 grades. For help choosing the correct washer for your fastener and application, contact the Vital Parts technical sales team on 01233 713581.

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