Washer DIN 93

Description

A lock washer with a tab or tab that bends to lock nuts or bolts and prevent them from loosening due to vibration or movement. It is used in mechanical applications where secure and reliable fastening is required, especially in machinery and automotive.

Assembly

The DIN 93 washer must be placed between the nut or screw and the support surface, ensuring that the tongue is aligned with a groove, hole or protrusion of the fixed part. After tightening the screw or nut, the tab is bent against a flat face or in the groove to lock the rotation and prevent vibration loosening.

Materials

The DIN 93 washer is a safety washer made of steel, with a tab or tab that bends to lock nuts or screws and prevent them from loosening due to vibration or movement. It is used in mechanical applications where secure and reliable fastening is required, especially in machinery and automotive.

Technical data

Para / For	b	d1	d2	L	r	s
M3	4	3.2	12	13	2.5	0.38
M4	5	4.3	14	14	2.5	0.38
M5	6	5.3	17	16	2.5	0.5
M6	7	6.4	19	18	4	0.5
M8	8	8.4	22	20	4	0.75
M10	10	10.5	26	22	6	0.75
M12	12	13	30	28	10	1
M14	12	15	33	28	10	1
M16	15	17	36	32	10	1
M18	18	19	40	36	10	1
M20	18	21	42	36	10	1
M22	20	23	50	42	10	1
M24	20	25	50	42	10	1
M27	23	28	58	48	16	1.6
M30	26	31	63	52	16	1.6
M33	28	34	68	56	16	1.6
M36	30	37	75	60	16	1.6
M39	32	40	82	64	16	1.6
M42	35	43	88	70	16	1.6
M45	38	46	95	75	16	1.6
M48	40	50	100	80	16	1.6
M52	44	54	105	85	16	1.6

Technical drawing and installation parameters of the DIN 93 tab washers

This technical diagram defines the dimensions and geometric variables that are essential for the correct selection and installation of the DIN 93 tab washer, which is bent over to lock the nut or bolt mechanically. It shows the critical dimensions linked to the specification tables, such as the thread size of the bolt or nut it accompanies, the width of the tab (b), the inside diameter (d1), the outside diameter (d2), the length of the tab (L), the fillet radius (r) and the material thickness (s). Complying with these dimensions ensures that the tab is correctly housed and bent against the edge of the part, guaranteeing a secure fastening in machinery and automotive applications.

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