M4 Penny Washer (Standard) 4.3mm ID x 12mm OD A2 Stainless Steel

Product code: WPE-M4-12-A2
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M4 Penny Washer (Standard) 4.3mm ID x 12mm OD A2 Stainless Steel
M4 Penny Washer (Standard) 4.3mm ID x 12mm OD A2 Stainless Steel
M4 Penny Washer (Standard) 4.3mm ID x 12mm OD A2 Stainless Steel
M4 Penny Washer (Standard) 4.3mm ID x 12mm OD A2 Stainless Steel
M4 Penny Washer (Standard) 4.3mm ID x 12mm OD A2 Stainless Steel
M4 Penny Washer (Standard) 4.3mm ID x 12mm OD A2 Stainless Steel
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Product Specification
Size M4
Internal Diameter 4.3mm
Outside Diameter 12.0mm
Thickness 1.25mm
Material A2 Stainless Steel

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Order by 4pm (UK) for same day dispatch, Monday to Thursday or 2pm Friday.

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M4 Penny Washer - 4.3mm ID x 12mm OD | A2 Stainless Steel

Providing a wider bearing surface for general indoor and sheltered outdoor fastening, this M4 Penny Washer is made from A2 Stainless Steel with a 1.25mm thickness. The enlarged 12.0mm outside diameter helps spread fastener pressure and can reduce the risk of a bolt or nut pulling through softer material.

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

  • Electrical Equipment: Supports bolted fixings in panels, enclosures, equipment housings and mounting brackets.
  • Marine Equipment: A4 variants suit compatible marine and coastal assemblies where increased corrosion resistance is required.
  • 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.

M4 x 12mm Stainless Steel Penny Washer Dimensions

  • Size: M4
  • Internal Diameter: 4.3mm
  • Outside Diameter: 12.0mm
  • Thickness: 1.25mm
  • Material: A2 Stainless Steel

Key Benefits

  • Wide washer footprint helps distribute clamping force across softer or thinner materials.
  • Suitable for use with compatible bolts, machine screws and nuts.
  • A2 Stainless Steel offers dependable corrosion resistance for general engineering, construction and maintenance applications.
  • M4 size with 4.3mm internal diameter matches the uploaded SKU specification.

Compare alternative sizes and stainless steel grades in the Penny Washers, Repair Washers and Mudguard Washers range. For technical selection support, speak with our team on 01233 713581.

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