DIN 434 Taper Washer

The taper washer is used when working with channel sections and can be manufactured to two standards.

All else being equal, there is a small but in some cases significant difference. The German standard DIN 434 specifies a washer with a channel flange slope of 8%. The Russian standard GOST 10906-78 increases this parameter to 10%.

This should be taken into account when selecting a washer, and attention should be paid to the marking. This type of washer is sometimes also called a wedge washer.

Features and application of the taper washer DIN 434

The washer’s design feature is its unusual configuration: a square shape with two grooves and different thickness dimensions. This makes it possible to compensate for the channel flange slope when installing fastening devices.

During installation, the taper washer is placed under a bolt or nut, with its grooves resting against the channel flanges. This evens out the height difference between the channel’s sides, making the fastening joint stronger and more reliable. The grooves prevent the washer from rotating and hold it in the required position.

The taper washer to DIN 434 is made from sheet carbon steel with an anti-corrosion coating — electroplated or hot-dip galvanized. Fasteners made from austenitic stainless steel grades A2 and A4 are also used. Stainless steel requires no additional protection and is resistant to aggressive environments.

FLOK supplies taper washers on wholesale orders in the required volume and range of sizes and materials.

Dimensions of the DIN 434 washer, in mm

The DIN 434 washer for channel sections and its main dimensions are shown in the table below:

d	d	a	b
M8	9	22	22
M10	11	22	22
M12	14	26	30
M16	18	32	36
M20	22	44	50
M24	26	56	56
M27	30	56	56