This product is regulated by the following standards:

Technical data

UNI 8841
DIN 6797

Standard UNI 8841

Toothed lock washers, external form A, internal J, conical V

Dimensions in mm - source UNI 8841
Publication date: 04/1985
Thread size	Form A				Form J				Form V
Thread size	d1 min=nom	d2 max=nom	s nom	Nr. of teeth	d1 min=nom	d2 max=nom	s nom	Nr. of teeth	d1 min=nom	d2 max nom	s	Nr. of teeth
M 1.6	1.7	3.6	0.3	6	1.7	3.6	0.3	6	-	-	-	-
M 1.8	2	4	0.3	6	2	4	0.3	6	-	-	-	-
M 2	2.2	4.5	0.3	6	2.2	4.5	0.3	6	2.2	4.5	0.2	6
M 2.2	2.4	5	0.4	6	2.4	5	0.4	6	2.4	5	0.2	6
M 2.5	2.7	5.5	0.4	6	2.7	5.5	0.4	6	2.7	5.5	0.2	6
M 3	3.2	6	0.4	6	3.2	6	0.4	6	3.2	6	0.2	6
M3.5	3.7	7	0.5	6	3.7	7	0.5	6	3.7	7	0.25	6
M 4	4.3	8	0.5	8	4.3	8	0.5	8	4.3	8	0.25	8
M 5	5.3	10	0.6	8	5.3	10	0.6	8	5.3	10	0.3	8
M 6	6.4	11	0.7	8	6.4	11	0.7	8	6.4	11	0.4	10
M 7	7.4	12.5	0.8	8	7.4	12.5	0.8	8	-	-	-	-
M 8	8.4	15	0.8	8	8.4	15	0.8	8	8.4	15	0.4	10
M 10	10.5	18	0.9	9	10.5	18	0.9	9	10.5	18	0.5	10
M 12	13	20.5	1	10	13	20.5	1	10	13	20.5	0.5	10
M 14	15	24	1	10	15	24	1	10	15	24	0.6	12
M 16	17	26	1.2	12	17	26	1.2	12	17	26	0.6	12
M 18	19	30	1.4	12	19	30	1.4	12	-	-	-	-
M 20	21	33	1.4	12	21	33	1.4	12	-	-	-	-
M 22	23	36	1.5	14	23	36	1.5	14	-	-	-	-
M 24	25	38	1.5	14	25	38	1.5	14	-	-	-	-
M 27	28	44	1.6	14	28	44	1.6	14	-	-	-	-
M 30	31	48	1.6	14	31	48	1.6	14	-	-	-	-

Standard DIN 6797

Toothed lock washers, external form A, internal J, conical V

Dimensions in mm - source DIN 6797 Withdrawn
Publication date: 07/1988 - Supersedes DIN 6797: 08/1971
Thread size	Form A				Form J				Form V
Thread size	d1 min=nom	d2 max=nom	s nom	Nr. of teeth	d1 min=nom	d2 max=nom	s nom	Nr. of teeth	d1 min=nom	d2 max nom	s	Nr. of teeth
M 1.6	1.7	3.6	0.3	6	1.7	3.6	0.3	6	-	-	-	-
M 2	2.2	4.5	0.3	6	2.2	4.5	0.3	6	2.2	4.2	0.2	6
M 2.5	2.7	5.5	0.4	6	2.7	5.5	0.4	6	2.7	5.1	0.2	6
M 3	3.2	6	0.4	6	3.2	6	0.4	6	3.2	6	0.2	6
M3.5	3.7	7	0.5	6	3.7	7	0.5	6	3.7	7	0.25	6
M 4	4.3	8	0.5	8	4.3	8	0.5	8	4.3	8	0.25	8
M 5 *	5.1	9	0.5	8	5.1	9	0.5	8
M 5	5.3	10	0.6	8	5.3	10	0.6	8	5.3	9.8	0.3	8
M 6	6.4	11	0.7	8	6.4	11	0.7	8	6.4	-	-	-
M 7	7.4	12.5	0.8	8	7.4	12.5	0.8	8	7.4	11.8	0.4	10
M 8 *	8.2	14	0.8	8	8.2	14	0.8	8
M 8	8.4	15	0.8	8	8.4	15	0.8	8	8.4	15.3	0.4	10
M 10	10.5	18	0.9	9	10.5	18	0.9	9	10.5	19	0.5	10
M 12	13	20.5	1	10	13	20.5	1	10	13	23	0.5	10
M 14	15	24	1	10	15	24	1	10	15	26.2	0.6	12
M 16	17	26	1.2	12	17	26	1.2	12	17	30.2	0.6	12
M 18	19	30	1.4	12	19	30	1.4	12	-	-	-	-
M 20	21	33	1.4	12	21	33	1.4	12	-	-	-	-
M 22	23	36	1.5	14	23	36	1.5	14	-	-	-	-
M 24	25	38	1.5	14	25	38	1.5	14	-	-	-	-
M 27	28	44	1.6	14	28	44	1.6	14	-	-	-	-
M 30	31	48	1.6	14	31	48	1.6	14	-	-	-	-

* for hexagon screws only

Dimensions in mm - source DIN 6797 Publication date: 1988 ≈ weigths
Thread size	d1 nom=min	Form A	Form J	Form V
Thread size	d1 nom=min	≈ weigth in kg x1000 pcs, (ρ=7,85 kg/dm3)	≈ weigth in kg x1000 pcs, (ρ=7,85 kg/dm3)	≈ weigth in kg x1000 pcs, (ρ=7,85 kg/dm3)
M 1.6	1.7	0.01	-
M 2	2.2	0.025	0.04	0.02
M 2.5	2.7	0.04	0.045	0.025
M 3	3.2	0.045	0.045	0.025
M3.5	3.7	0.075	0.085	0.04
M 4	4.3	0.095	0.1	0.05
M 5 *	5.1
M 5	5.3	0.18	0.2	0.12
M 6	6.4	0.22	0.25	0.2
M 7	7.4	0.3	0.35
M 8 *	8.2
M 8	8.4	0.45	0.55	0.4
M 10	10.5	0.8	0.9	0.7
M 12	13	1	1.2	1.2
M 14	15	1.6	1.9	1.3
M 16	17	2	2.4	1.3
M 18	19	3.5	3.7
M 20	21	3.8	4.1
M 22	23	5	6
M 24	25	6	6.5
M 27	28	8	8.5
M 30	31	9	9.5

Toothed lock washers, external form A, internal J, conical V

Dimensions in mm - source DIN 6797 Withdrawn
Publication date: 07/1988 - Supersedes DIN 6797: 08/1971
Thread size	Form A				Form J				Form V
Thread size	d1 min=nom	d2 max=nom	s nom	Nr. of teeth	d1 min=nom	d2 max=nom	s nom	Nr. of teeth	d1 min=nom	d2 max nom	s	Nr. of teeth
M 1.6	1.7	3.6	0.3	6	1.7	3.6	0.3	6	-	-	-	-
M 2	2.2	4.5	0.3	6	2.2	4.5	0.3	6	2.2	4.2	0.2	6
M 2.5	2.7	5.5	0.4	6	2.7	5.5	0.4	6	2.7	5.1	0.2	6
M 3	3.2	6	0.4	6	3.2	6	0.4	6	3.2	6	0.2	6
M3.5	3.7	7	0.5	6	3.7	7	0.5	6	3.7	7	0.25	6
M 4	4.3	8	0.5	8	4.3	8	0.5	8	4.3	8	0.25	8
M 5 *	5.1	9	0.5	8	5.1	9	0.5	8
M 5	5.3	10	0.6	8	5.3	10	0.6	8	5.3	9.8	0.3	8
M 6	6.4	11	0.7	8	6.4	11	0.7	8	6.4	-	-	-
M 7	7.4	12.5	0.8	8	7.4	12.5	0.8	8	7.4	11.8	0.4	10
M 8 *	8.2	14	0.8	8	8.2	14	0.8	8
M 8	8.4	15	0.8	8	8.4	15	0.8	8	8.4	15.3	0.4	10
M 10	10.5	18	0.9	9	10.5	18	0.9	9	10.5	19	0.5	10
M 12	13	20.5	1	10	13	20.5	1	10	13	23	0.5	10
M 14	15	24	1	10	15	24	1	10	15	26.2	0.6	12
M 16	17	26	1.2	12	17	26	1.2	12	17	30.2	0.6	12
M 18	19	30	1.4	12	19	30	1.4	12	-	-	-	-
M 20	21	33	1.4	12	21	33	1.4	12	-	-	-	-
M 22	23	36	1.5	14	23	36	1.5	14	-	-	-	-
M 24	25	38	1.5	14	25	38	1.5	14	-	-	-	-
M 27	28	44	1.6	14	28	44	1.6	14	-	-	-	-
M 30	31	48	1.6	14	31	48	1.6	14	-	-	-	-

* for hexagon screws only

Dimensions in mm - source DIN 6797 Publication date: 1988 ≈ weigths
Thread size	d1 nom=min	Form A	Form J	Form V
Thread size	d1 nom=min	≈ weigth in kg x1000 pcs, (ρ=7,85 kg/dm3)	≈ weigth in kg x1000 pcs, (ρ=7,85 kg/dm3)	≈ weigth in kg x1000 pcs, (ρ=7,85 kg/dm3)
M 1.6	1.7	0.01	-
M 2	2.2	0.025	0.04	0.02
M 2.5	2.7	0.04	0.045	0.025
M 3	3.2	0.045	0.045	0.025
M3.5	3.7	0.075	0.085	0.04
M 4	4.3	0.095	0.1	0.05
M 5 *	5.1
M 5	5.3	0.18	0.2	0.12
M 6	6.4	0.22	0.25	0.2
M 7	7.4	0.3	0.35
M 8 *	8.2
M 8	8.4	0.45	0.55	0.4
M 10	10.5	0.8	0.9	0.7
M 12	13	1	1.2	1.2
M 14	15	1.6	1.9	1.3
M 16	17	2	2.4	1.3
M 18	19	3.5	3.7
M 20	21	3.8	4.1
M 22	23	5	6
M 24	25	6	6.5
M 27	28	8	8.5
M 30	31	9	9.5

Full list of Suppliers of Toothed lock washers, external form A, internal J, conical V

India

Hengshun International Trade (H.K.) Co., Ltd

Manufacturer of lock washers, flat washers, spring and tab washers

J & L SPRINGLOCKWASHER LTD

Manufacturer of spring lock washers and shakeproof washers. Metric and imperial sizes. Production of wire for spring and retaining rings.

Taiwan

MING SHEANG DETAILED INDUSTRIAL CO., LTD.

Manufacturer specialized in cage nuts, u-nuts, clips and serrated lock washers

Italy

Filtomatic Fasteners Srl

Leading manufacturer of stainless steel washers and compensation rings for ball bearings. Standard and special parts.

Italy

BENERI Spa

Manufacturer of retaining rings for shaftsand bores- Din 47; Din 472 mm and inches. Toothed washers.

Quality certificates: ISO/TS 16949-2009; ISO 9001-2008

China

BSC CORPORATION LTD

Manufacturer of fasteners, specialized in washers and stampings.

Germany

Christian Bauer GmbH + Co. KG

Manufacturer of conical spring washers and precision parts

Spain

Claudio San Martin S.A.

Manufacturer of plain washers, spring washers, security and toothed washers

Spain

DAMESA (MIKALOR)

Producer of hose clamps, cage nuts, rings, toothed washers and fast fixings

Flat Washer Solutions

Manufacturer of standard and special washers in different materials, with internal diameter from 2.5 up to 80mm.

USA

Freeway Corporation

Manufacturer of metal stampings, washers and component assemblies

Italy

Distributor of retaining rings, Spiral retaining rings, wave springs, Disc springs, Washers, Elastic pins, Pins, Keys, Ground flat/bar stocks, Locking nuts, washers, Miniplast plastic parts, Metallic screws, nuts, bolts.

Germany

Gebr. Großheim OHG

Manufacturer of washers and high quality safety shims. All materials: aluminium, bronze, iron and steel, stainless steel (A2, A4), copper, brass etc.

France