DIN 25201

Dual lock washer

tech-din25201




Size 3 3.5 3.5
Large②
Bolt size Metric M3 M3.5 M3.5
Inch #5 #6 #6
d max 3.5 4 4
min 3.3 3.8 3.8
dc Nominal Size 7 7.6 9
max 7.2 7.8 9.2
min 6.8 7.4 8.8
h Steel Nominal Size 1.8 1.8 1.8
max 2.05 2.05 2.05
min 1.55 1.55 1.55
per 1000 units≈kg③ Steel ≈ 0.3 0.4 0.6
h Stainless Steel Nominal Size 2.2 2.2 2.2
max 2.45 2.45 2.45
min 1.95 1.95 1.95
per 1000 units≈kg③ Stainless Steel ≈ 0.4 0.4 0.7

Size 4 4
Large②		 5
Bolt size Metric M4 M4 M5
Inch #8 #8 #10
d max 4.5 4.5 5.5
min 4.3 4.3 5.3
dc Nominal Size 7.6 9 9
max 7.8 9.2 9.2
min 7.4 8.8 8.8
h Steel Nominal Size 1.8 1.8 1.8
max 2.05 2.05 2.05
min 1.55 1.55 1.55
per 1000 units≈kg③ Steel ≈ 0.4 0.6 0.5
h Stainless Steel Nominal Size 2.2 2.2 2.2
max 2.45 2.45 2.45
min 1.95 1.95 1.95
per 1000 units≈kg③ Stainless Steel ≈ 0.4 0.7 0.6

Size 5
Large②		 6 6
Large②
Bolt size Metric M5 M6 M6
Inch #10 - -
d max 5.5 6.6 6.6
min 5.3 6.4 6.4
dc Nominal Size 10.8 10.8 13.5
max 11 11 13.7
min 10.6 10.6 13.3
h Steel Nominal Size 1.8 1.8 2.5
max 2.05 2.05 2.75
min 1.55 1.55 2.25
per 1000 units≈kg③ Steel ≈ 1.1 0.7 2
h Stainless Steel Nominal Size 2.2 2.2 2
max 2.45 2.45 2.25
min 1.95 1.95 1.75
per 1000 units≈kg③ Stainless Steel ≈ 1.1 0.9 1.6

Size 1/4① 1/4
Large① ②		 8
Bolt size Metric - - M8
Inch 1/4” 1/4” 5/16”
d max 7.3 7.3 8.8
min 7.1 7.1 8.6
dc Nominal Size 11.5 13.5 13.5
max 11.7 13.7 13.7
min 11.3 13.3 13.3
h Steel Nominal Size 2.5 2.5 2.5
max 2.75 2.75 2.75
min 2.25 2.25 2.25
per 1000 units≈kg③ Steel ≈ 0.8 1.8 1.5
h Stainless Steel Nominal Size 2.2 2.2 2
max 2.45 2.45 2.25
min 1.95 1.95 1.75
per 1000 units≈kg③ Stainless Steel ≈ 0.9 1.5 1.2

Size 8
Large②		 3/8① 3/8 Large ①②
Bolt size Metric M8 - -
Inch 5/16” 3/8” 3/8”
d max 8.8 10.5 10.5
min 8.6 10.1 10.1
dc Nominal Size 16.6 16.6 21
max 16.8 16.8 21.2
min 16.4 16.4 20.8
h Steel Nominal Size 2.5 2.5 2.5
max 2.75 2.75 2.75
min 2.25 2.25 2.25
per 1000 units≈kg③ Steel ≈ 2.8 2.3 4.8
h Stainless Steel Nominal Size 2 2 2
max 2.25 2.25 2.25
min 1.75 1.75 1.75
per 1000 units≈kg③ Stainless Steel ≈ 2.3 1.9 3.8

Size 10 10
Large②		 11
Bolt size Metric M10 M10 M11
Inch - - 7/16”
d max 10.9 10.9 11.6
min 10.5 10.5 11.2
dc Nominal Size 16.6 21 18.5
max 16.8 21.2 18.7
min 16.4 20.8 18.3
h Steel Nominal Size 2.5 2.5 2.5
max 2.75 2.75 2.75
min 2.25 2.25 2.25
per 1000 units≈kg③ Steel ≈ 2.2 4.7 2.9
h Stainless Steel Nominal Size 2 2 2.2
max 2.25 2.25 2.45
min 1.75 1.75 1.95
per 1000 units≈kg③ Stainless Steel ≈ 1.8 3.7 2.6

Size 12 12
Large②		 1/2①
Bolt size Metric M12 M12 -
Inch - - 1/2”
d max 13.2 13.2 13.7
min 12.8 12.8 13.3
dc Nominal Size 19.5 25.4 19.5
max 19.7 25.6 19.7
min 19.3 25.2 19.3
h Steel Nominal Size 2.5 3.4 2.5
max 2.75 3.65 2.75
min 2.25 3.15 2.25
per 1000 units≈kg③ Steel ≈ 2.9 9.3 2.7
h Stainless Steel Nominal Size 2 3 2
max 2.25 3.25 2.25
min 1.75 2.75 1.75
per 1000 units≈kg③ Stainless Steel ≈ 2.3 8.2 2.2

Size 1/2
Large① ②		 14 14
Large②
Bolt size Metric - M14 M14
Inch 1/2” 9/16” 9/16”
d max 13.7 15.4 15.4
min 13.3 15 15
dc Nominal Size 25.4 23 30.7
max 25.6 23.2 30.9
min 25.2 22.8 30.5
h Steel Nominal Size 3.4 3.4 3.4
max 3.65 3.65 3.65
min 3.15 3.15 3.15
per 1000 units≈kg③ Steel ≈ 9 5.6 14.1
h Stainless Steel Nominal Size 3.2 3 3.2
max 3.45 3.25 3.45
min 2.95 2.75 2.95
per 1000 units≈kg③ Stainless Steel ≈ 8 4.9 13.1

Size 16 16
Large②		 18
Bolt size Metric M16 M16 M18
Inch 5/8” 5/8” -
d max 17.2 17.2 19.7
min 16.8 16.8 19.3
dc Nominal Size 25.4 30.7 29
max 25.6 30.9 29.2
min 25.2 30.5 28.8
h Steel Nominal Size 3.4 3.4 3.4
max 3.65 3.65 3.65
min 3.15 3.15 3.15
per 1000 units≈kg③ Steel ≈ 6.7 12.8 8.9
h Stainless Steel Nominal Size 3 3.2 3.2
max 3.25 3.45 3.45
min 2.75 2.95 2.95
per 1000 units≈kg③ Stainless Steel ≈ 5.9 11.3 8

Size 18
Large②		 3/4① 3/4
Large① ②
Bolt size Metric M18 - -
Inch - 3/4” 3/4”
d max 19.7 20.2 20.2
min 19.3 19.8 19.8
dc Nominal Size 34.5 30.7 39
max 34.7 30.9 39.2
min 34.3 30.5 38.8
h Steel Nominal Size 3.4 3.4 3.4
max 3.65 3.65 3.65
min 3.15 3.15 3.15
per 1000 units≈kg③ Steel ≈ 15.8 10.5 22.1
h Stainless Steel Nominal Size 3.2 3.2 3.2
max 3.45 3.45 3.45
min 2.95 2.95 2.95
per 1000 units≈kg③ Stainless Steel ≈ 15.6 9.6 21

Size 20 20
Large②		 22
Bolt size Metric M20 M20 M22
Inch - - 7/8”
d max 21.6 21.6 23.6
min 21.2 21.2 23.2
dc Nominal Size 30.7 39 34.5
max 30.9 39.2 34.7
min 30.5 38.8 34.3
h Steel Nominal Size 3.4 3.4 3.4
max 3.65 3.65 3.65
min 3.15 3.15 3.15
per 1000 units≈kg③ Steel ≈ 9.3 20.9 12.5
h Stainless Steel Nominal Size 3 3.2 3.2
max 3.25 3.45 3.45
min 2.75 2.95 2.95
per 1000 units≈kg③ Stainless Steel ≈ 8.2 20.6 12.3

Size 22
Large②		 24 24
Large②
Bolt size Metric M22 M24 M24
Inch 7/8” - -
d max 23.6 25.5 25.5
min 23.2 25.1 25.1
dc Nominal Size 42 39 48.5
max 42.2 39.2 48.7
min 41.8 38.8 48.3
h Steel Nominal Size 4.6 3.4 4.6
max 4.85 3.65 4.85
min 4.35 3.15 4.35
per 1000 units≈kg③ Steel ≈ 31.9 17.4 45.1
h Stainless Steel Nominal Size 3.2 3.2 3.2
max 3.45 3.45 3.45
min 2.95 2.95 2.95
per 1000 units≈kg③ Stainless Steel ≈ 22.2 15.9 35

Size 1① 1
Large① ②		 27
Bolt size Metric - - M27
Inch 1” 1” -
d max 28.1 28.1 28.6
min 27.7 27.7 28.2
dc Nominal Size 39 48.5 42
max 39.3 48.8 42.3
min 38.7 48.2 41.7
h Steel Nominal Size 3.4 4.6 5.8
max 3.65 4.85 6.05
min 3.15 4.35 5.55
per 1000 units≈kg③ Steel ≈ 15.3 42 31.4
h Stainless Steel Nominal Size 3.2 3.2 6.8
max 3.2 3.2 6.8
min 2.7 2.7 6.3
per 1000 units≈kg③ Stainless Steel ≈ 14.2 27.9 34.5

Size 27
Large②		 30 30
Large②
Bolt size Metric M27 M30 M30
Inch - 1 1/8” 1 1/8”
d max 28.6 31.6 31.6
min 28.2 31.2 31.2
dc Nominal Size 48.5 47 58.5
max 48.8 47.3 58.8
min 48.2 46.7 58.2
h Steel Nominal Size 5.8 5.8 6.6
max 6.05 6.05 6.6
min 5.55 5.55 6.1
per 1000 units≈kg③ Steel ≈ 52.7 41 85.8
h Stainless Steel Nominal Size 6.8 6.8 6.8
max 6.8 6.8 6.8
min 6.3 6.3 6.3
per 1000 units≈kg③ Stainless Steel ≈ 53.4 44.9 91.8

Size 33 33
Large②		 36
Bolt size Metric M33 M33 M36
Inch 1 1/4” 1 1/4” 1 3/8”
d max 34.6 34.6 37.6
min 34.2 34.2 37.2
dc Nominal Size 48.5 58.5 55
max 48.8 58.8 55.3
min 48.2 58.2 54.7
h Steel Nominal Size 5.8 6.6 5.8
max 6.05 6.6 6.05
min 5.55 6.1 5.55
per 1000 units≈kg③ Steel ≈ 38.9 80 54.9
h Stainless Steel Nominal Size 6.8 / 6.8
max 6.8 / 6.8
min 6.3 / 6.3
per 1000 units≈kg③ Stainless Steel ≈ 42.8 / 59.6

Size 36
Large②		 39 42
Bolt size Metric M36 M39 M42
Inch 1 3/8” 1 1/2” -
d max 37.6 40.6 43.4
min 37.2 40.2 43
dc Nominal Size 63 58.5 63
max 63.3 58.8 63.3
min 62.7 58.2 62.7
h Steel Nominal Size 6.6 5.8 5.8
max 6.6 6.05 6.05
min 6.1 5.55 5.55
per 1000 units≈kg③ Steel ≈ 91.5 58.9 79.7
h Stainless Steel Nominal Size / 6.8 6.8
max / 6.8 6.8
min / 6.3 6.3
per 1000 units≈kg③ Stainless Steel ≈ / 67.4 75

Size 45 48 52
Bolt size Metric M45 M48 M52
Inch 1 3/4” - 2”
d max 46.7 50.1 54.1
min 46.2 49.6 53.6
dc Nominal Size 70 75 80
max 70 75 80
min 68 73 78
h Steel Nominal Size 7 7 7
max 7.75 7.75 7.75
min 6.25 6.25 6.25
per 1000 units≈kg③ Steel ≈ 102 120 130
h Stainless Steel Nominal Size 6.8 6.8 9
max 7.55 7.55 9.75
min 6.05 6.05 8.25
per 1000 units≈kg③ Stainless Steel ≈ 102 120 180.4

Size 56 60 64
Bolt size Metric M56 M60 M64
Inch 2 1/4” - 2 1/2”
d max 59.6 63.6 67.6
min 59.1 63.1 67.1
dc Nominal Size 85 90 95
max 85 90 95
min 83 88 93
h Steel Nominal Size 7 7 7
max 7.75 7.75 7.75
min 6.25 6.25 6.25
per 1000 units≈kg③ Steel ≈ 135 152 167
h Stainless Steel Nominal Size 9 9 9
max 9.75 9.75 9.75
min 8.25 8.25 8.25
per 1000 units≈kg③ Stainless Steel ≈ 213 235 258

Size 68 72 76
Bolt size Metric M68 M72 M76
Inch - - 3”
d max 71.6 75.6 79.6
min 71.1 75.1 79.1
dc Nominal Size 100 105 110
max 100 105 110
min 98 103 108
h Steel Nominal Size 9.5 9.5 9.5
max 10.25 10.25 10.25
min 8.75 8.75 8.75
per 1000 units≈kg③ Steel ≈ 282 307 333
h Stainless Steel Nominal Size 9 9 9
max 9.75 9.75 9.75
min 8.25 8.25 8.25
per 1000 units≈kg③ Stainless Steel ≈ 282 307 333

Size 80 85 90
Bolt size Metric M80 M85 M90
Inch 3 1/8” - -
d max 83.6 88.6 92.9
min 83.1 88.1 92.4
dc Nominal Size 115 120 130
max 115 120 130
min 113 118 128
h Steel Nominal Size 9.5 9.5 9.5
max 10.25 10.25 10.25
min 8.75 8.75 8.75
per 1000 units≈kg③ Steel ≈ 360 378 477
h Stainless Steel Nominal Size 9 / /
max 9.75 / /
min 8.25 / /
per 1000 units≈kg③ Stainless Steel ≈ 360 / /

Size 95 100 105
Bolt size Metric M95 M100 M105
Inch - 4” -
d max 97.9 103.9 108.9
min 97.4 103.4 108.4
dc Nominal Size 135 145 150
max 135 145 150
min 133 143 148
h Steel Nominal Size 9.5 9.5 9.5
max 10.25 10.25 10.25
min 8.75 8.75 8.75
per 1000 units≈kg③ Steel ≈ 498 589 613
h Stainless Steel Nominal Size / / /
max / / /
min / / /
per 1000 units≈kg③ Stainless Steel ≈ / / /

Size 110 115 120
Bolt size Metric M110 M115 M120
Inch - - -
d max 113.9 118.9 123.9
min 113.4 118.4 123.4
dc Nominal Size 155 165 170
max 155 165 170
min 153 163 168
h Steel Nominal Size 9.5 9.5 9.5
max 10.25 10.25 10.25
min 8.75 8.75 8.75
per 1000 units≈kg③ Steel ≈ 635 753 779
h Stainless Steel Nominal Size / / /
max / / /
min / / /
per 1000 units≈kg③ Stainless Steel ≈ / / /

Size 125 130
Bolt size Metric M125 M130
Inch - 5”
d max 128.9 133.9
min 128.4 133.4
dc Nominal Size 173 178
max 173 178
min 171 176
h Steel Nominal Size 9.5 9.5
max 10.25 10.25
min 8.75 8.75
per 1000 units≈kg③ Steel ≈ 766 792
h Stainless Steel Nominal Size / /
max / /
min / /
per 1000 units≈kg③ Stainless Steel ≈ / /



① = The specification is in inches.
② = Large Type
③ = "Thousands of pieces" can be understood as "the weight of each thousand sets of washers"


All information is strictly informative