Hobson Internal Tooth Lock Washer, M4

The Hobson internal tooth lock washer comes in 9 sizes (zinc plated): M3 to M20. An internal tooth lock washer has teeth around its inside edge, next to the bolt. The teeth bite into the surfaces on either side when the fastener is tightened.

Where this product is used

• Fitted under a nut or screw head as a lock washer
• Where the joint calls for a toothed lock washer under the head

Features

• 9 items: M3 to M20
• Zinc plated
• Pack quantity shown for each item
• IFI 532 Type A

Key specifications

Choosing the right option

Choose the washer by the screw or bolt size it is made for. An external tooth washer has the teeth on the outside edge instead. Zinc plating is a thin zinc coating; hot dip galvanised washers carry a thicker one. For a similar washer in another material, finish or size range see Hobson Internal Tooth Lock Washer, Type A, Zinc Plated, 1/8" to 1".

Related washers: Hobson Internal Tooth Lock Washer, Type A, Zinc Plated, 1/8" to 1", Hobson External Tooth Lock Washer, Type A, Zinc Plated, 1/8" to 1" and Hobson External Tooth Lock Washer, Type A, Zinc Plated, M3 to M20.