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The Boltstore 4FW04 is a M4/4mm flat washer constructed from A4 marine grade stainless steel.
This flat washer provides a bearing surface for fastener load distribution or alternatively, it can be used as a spacer between components.
The 4FW04 distributes the load of a fastener across a surface and can also be used as a spacer, spring, shim, or locking device.