M4 Split Lock Washers

M4 split lock washers are washers with a split and spring action, designed for use with M4 threaded fasteners. The M4 designation indicates compatibility with metric fasteners having a 4mm nominal diameter. They are typically used to secure bolted joints against vibration and movement.

Specifications

Thread Size	M4

About washers

M4 Split Lock Washers is listed under Washers — flat, split lock, tooth, belleville and structural washers. Washers are thin, flat plates with a central hole, primarily used to distribute the load of a threaded fastener, prevent loosening, or provide spacing. Flat washers, such as those conforming to ASME B18.21.1 or DIN 125, increase the bearing surface area, reducing the risk of material deformation under the fastener head or nut.

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