Washer DIN 125B

Description

The DIN 125B washer is a flat, circular and uniform thickness fastener, used to distribute the load of a screw or nut over a wider surface. Its function is to protect the support surfaces, reduce wear and improve the stability of the bolted joint.

Assembly

The DIN 125B flat washer must be assembled by placing the washer between the screw or nut head and the support surface, ensuring an even distribution of the load. It is important to correctly align the washer and apply the specified tightening torque, avoiding overtightening that can deform the part or the fastening material.

Materials

DIN 125B washers are made of carbon steel, stainless steel (A2, A4), brass or nylon. Typical finishes include galvanizing, phosphating, or nickel plating, which improve corrosion and wear resistance. The choice of material and finish depends on the application environment and mechanical requirements.

Technical data

Para / For	D1	D2	H
M1 (#DIN)	1.1	3	0.3
M1.2 (#DIN)	1.3	3.5	0.3
M1.4 (#DIN)	1.5	4	0.3
M1.6	1.7	4	0.3
M1.7	1.8	4.5	0.3
M2	2.2	5	0.3
M2.5	2.7	6	0.5
M3	3.2	7	0.5
M4	4.3	9	0.8
M5	5.3	10	1
M6	6.4	12	1.6
M7	7.4	14	1.6
M8	8.4	16	1.6
M10	10.5	20	2
M12	13	24	2.5
M14	15	28	2.5
M16	17	30	3
M18	19	34	3
M20	21	37	3
M22	23	39	3
M24	25	44	4
M26	27	50	4
M27	28	50	4
M30	31	56	4
M33	34	60	5
M36	37	66	5
M39	40	72	6
M42	43	78	7
M45	46	85	7
M48	50	92	8
M52	54	98	8
M56	58	105	9
M58	60	110	9
M60	62	110	9
M64	66	115	9
M68	70	120	10
M72	74	125	10
M76	78	135	10
M80	82	140	12
M90	93	160	12

Technical drawing and installation parameters of the DIN 125B plain washers

This technical diagram defines the dimensions and geometric variables that are essential for the correct selection and installation of the DIN 125B plain washer, of uniform thickness and with a chamfered outer edge. It shows the critical dimensions linked to the specification tables, such as the thread size of the bolt or nut it accompanies, the inside diameter (d1), the outside diameter (d2) and the height or thickness of the washer (h). Complying with these dimensions ensures a uniform distribution of the load over the bearing surface, reduces wear of the parts in contact and improves the stability of the bolted joint.

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