Plain steel washers are stronger, more wear resistant, and less costly than zinc-plated steel and stainless steel washers. They should not be used in wet or corrosive environments because they easily rust. Black-oxide steel washers have a matte-black finish that prevents corrosion in dry environments. Zinc-plated steel washers have an outer layer of zinc that prevents the steel from rusting in wet areas. Compared to stainless steel, they're stronger, more wear resistant, and less costly, but not as corrosion resistant. Avoid exposing them to salt water and chemicals. Blue-dyed steel washers have a unique color so you can tell they're metric at a glance.

Stainless steel washers are more corrosion resistant than steel washers, and almost as strong. Use them in damp and washdown applications without worrying about rust. 18-8 stainless steel and 17-7 PH stainless steel washers have similar qualities to one another, except 17-7 PH stainless steel washers are stronger. Black-oxide 18-8 stainless steel washers resist corrosion just as well as regular 18-8 stainless steel washers and have a matte-black finish. 316 stainless steel washers stand up to salt water, chlorine solutions, and other chemicals without rusting. Bumax 88 stainless steel washers are the most corrosion resistant washers in our offering. They're commonly used in marine environments and chemical-processing plants.

Washers that meet DIN and ISO specifications, meet international standards for washer dimensions. ISO 8738 is formerly DIN 1440. ISO 7093 is formerly DIN 9021.

3D CAD models availableFor technical drawings and 3-D models, click on a part number.

For Screw

Size ID,

mm OD,

mm Thick.,

mm Hardness Specifications Met Pkg.

Qty. Pkg.

Steel

M3 3.0 6.0 0.7-0.9 Rockwell B76 DIN 1440, ISO 8738 100 96505A111 $6.28

M4 4.0 8.0 0.7-0.9 Rockwell B76 DIN 1440, ISO 8738 100 96505A112 6.86

M5 5.0 10.0 0.7-0.9 Rockwell B76 DIN 1440, ISO 8738 100 96505A113 7.14

M5 5.5 18.0 1.7-2.3 Rockwell B50 DIN 440-R 100 98363A111 12.57

M6 6.0 12.0 1.3-1.7 Rockwell B76 DIN 1440, ISO 8738 100 96505A114 7.28

M6 6.4 17.0 2.7-3.3 Rockwell C35 DIN 6340 50 94630A111 11.43

M6 6.6 22.0 1.7-2.3 Rockwell B50 DIN 440-R 25 98363A112 8.57

M7 7.0 14.0 1.3-1.7 Rockwell B76 DIN 1440, ISO 8738 100 96505A115 8.57

M8 8.0 16.0 1.8-2.2 Rockwell B76 DIN 1440, ISO 8738 100 96505A116 11.43

M8 8.4 23.0 3.7-4.3 Rockwell C35 DIN 6340 25 94630A112 13.71

M8 9.0 28.0 2.4-3.6 Rockwell B50 DIN 440-R 10 98363A113 6.57

M10 10.0 20.0 2.2-2.8 Rockwell B76 DIN 1440, ISO 8738 50 96505A117 12.57

M10 10.5 28.0 3.7-4.3 Rockwell C35 DIN 6340 10 94630A113 8.57

M10 11.0 34.0 2.4-3.6 Rockwell B50 DIN 440-R 25 98363A114 11.43

M12 12.0 25.0 2.7-3.3 Rockwell B76 DIN 1440, ISO 8738 25 96505A118 9.43

M12 13.0 35.0 4.4-5.6 Rockwell C35 DIN 6340 10 94630A114 11.43

M12 13.5 44.0 3.4-4.6 Rockwell B50 DIN 440-R 5 98363A115 7.14

M14 14.0 28.0 2.7-3.3 Rockwell B76 DIN 1440, ISO 8738 25 96505A119 12.57

M16 16.0 28.0 2.7-3.3 Rockwell B76 DIN 1440, ISO 8738 25 96505A121 12.57

M16 17.0 45.0 5.4-6.6 Rockwell C35 DIN 6340 5 94630A115 12.86

M16 17.5 56.0 4.0-6.0 Rockwell B50 DIN 440-R 5 98363A116 10.85

M18 18.0 30.0 3.7-4.3 Rockwell B76 DIN 1440, ISO 8738 10 96505A122 8.00

M20 20.0 32.0 3.7-4.3 Rockwell B76 DIN 1440, ISO 8738 10 96505A123 8.57

M20 21.0 50.0 5.4-6.6 Rockwell C35 DIN 6340 5 94630A116 14.29

M20 22.0 72.0 5.0-7.0 Rockwell B50 DIN 440-R 1 98363A117 2.86

M22 22.0 34.0 3.7-4.3 Rockwell B76 DIN 1440, ISO 8738 10 96505A124 10.00

M22 24.0 80.0 5.0-7.0 Rockwell B50 DIN 440-R 1 98363A118 5.00

M24 24.0 38.0 3.7-4.3 Rockwell B76 DIN 1440, ISO 8738 10 96505A125 10.57

M24 25.0 60.0 7.0-9.0 Rockwell C35 DIN 6340 1 94630A117 5.14

M24 26.0 85.0 5.0-7.0 Rockwell B50 DIN 440-R 1 98363A119 5.14

M25 25.0 40.0 3.7-4.3 Rockwell B76 DIN 1440, ISO 8738 5 96505A126 8.00

M26 26.0 40.0 4.4-5.6 Rockwell B76 DIN 1440, ISO 8738 5 96505A127 9.43

M27 30.0 98.0 5.0-7.0 Rockwell B50 DIN 440-R 1 98363A121 6.57

M28 28.0 42.0 4.4-5.6 Rockwell B76 DIN 1440, ISO 8738 5 96505A128 11.43

M30 30.0 45.0 4.4-5.6 Rockwell B76 DIN 1440, ISO 8738 1 96505A129 2.86

M30 31.0 68.0 9.0-11.0 Rockwell C35 DIN 6340 1 94630A118 8.86

M32 32.0 50.0 4.4-5.6 Rockwell B76 DIN 1440, ISO 8738 1 96505A131 4.00

Black-Oxide Steel

M3 3.2 8.0 1.5-2.4 Rockwell 15N80 __ 25 98035A101 14.66

M3 3.2 12.0 2.5-3.4 Rockwell 15N80 __ 5 98040A101 7.77

M4 4.3 10.0 1.5-2.4 Rockwell 15N80 __ 25 98035A102 14.66

M4 4.3 14.0 2.5-3.4 Rockwell 15N80 __ 5 98040A102 7.96

M5 5.3 11.0 1.5-2.4 Rockwell 15N80 __ 10 98035A103 7.12

M5 5.3 15.0 3.0-3.9 Rockwell 15N80 __ 5 98040A103 9.42

M6 6.4 13.0 2.0-2.9 Rockwell 15N80 __ 10 98035A104 7.12

M6 6.4 18.0 4.0-4.9 Rockwell 15N80 __ 5 98040A104 10.46

M8 8.4 16.0 2.5-3.4 Rockwell 15N80 __ 10 98035A105 7.12

M8 8.4 22.0 4.5-5.4 Rockwell 15N80 __ 5 98040A105 8.37

M10 10.5 19.0 2.5-3.4 Rockwell 15N80 __ 10 98035A106 7.18

M10 10.5 23.0 4.5-5.4 Rockwell 15N80 __ 5 98040A106 9.01

M12 13.0 22.0 2.5-3.4 Rockwell 15N80 __ 10 98035A107 7.48

M12 13.0 26.0 4.5-5.4 Rockwell 15N80 __ 5 98040A107 9.45

M14 15.0 25.0 2.5-3.4 Rockwell 15N80 __ 10 98035A108 9.23

M14 15.0 27.0 4.5-5.4 Rockwell 15N80 __ 5 98040A108 9.82

M16 17.0 28.0 3.0-3.9 Rockwell 15N80 __ 10 98035A109 9.23

M16 17.0 32.0 4.5-5.4 Rockwell 15N80 __ 5 98040A109 10.48

M20 21.0 35.0 3.0-3.9 Rockwell 15N80 __ 10 98035A110 11.72

M20 21.0 35.0 4.5-5.4 Rockwell 15N80 __ 5 98040A110 11.72

M24 25.0 40.0 3.5-4.4 Rockwell 15N80 __ 5 98035A111 7.99

M24 25.0 43.0 6.0-6.9 Rockwell 15N80 __ 5 98040A111 14.21

M30 31.0 44.0 3.5-4.4 Rockwell 15N80 __ 5 98035A112 11.28

M30 31.0 48.0 6.0-6.9 Rockwell 15N80 __ 1 98040A112 3.94

M36 37.0 50.0 4.5-5.4 Rockwell 15N80 __ 5 98035A113 15.31

M36 37.0 50.0 7.0-7.9 Rockwell 15N80 __ 1 98040A113 5.19

Zinc-Plated Steel

M2.5 2.7 8.0 0.7-0.9 Rockwell B56 DIN 9021 100 91100A110 2.90

M3 3.2 9.0 0.7-0.9 Rockwell B56 DIN 9021 100 91100A120 3.03

M3 3.2 9.0 0.9-1.1 Rockwell B76 DIN 7349 100 97310A111 3.15

M4 4.3 12.0 0.9-1.1 Rockwell B56 DIN 9021 100 91100A130 4.45

M4 4.3 12.0 1.4-1.8 Rockwell B76 DIN 7349 100 97310A112 4.43

M5 5.3 15.0 1.0-1.4 Rockwell B56 DIN 9021 100 91100A140 4.70

M5 5.3 15.0 1.8-2.2 Rockwell B76 DIN 7349 100 97310A113 6.85

M6 6.4 17.0 2.7-3.3 Rockwell B76 DIN 7349 100 97310A114 14.29

M6 6.4 18.0 1.4-1.8 Rockwell B56 DIN 9021 100 91100A150 7.71

M8 8.4 21.0 3.7-4.3 Rockwell B76 DIN 7349 50 97310A115 14.29

M8 8.4 24.0 1.8-2.2 Rockwell B56 DIN 9021 100 91100A160 13.66

M10 10.5 25.0 3.7-4.3 Rockwell B76 DIN 7349 50 97310A116 12.57

M10 10.5 30.0 2.3-2.7 Rockwell B56 DIN 9021 50 91100A170 10.87

M12 13.0 30.0 5.4-6.6 Rockwell B76 DIN 7349 10 97310A117 9.43

M12 13.0 37.0 2.7-3.3 Rockwell B56 DIN 9021 25 91100A180 10.41

M14 15.0 36.0 5.4-6.6 Rockwell B76 DIN 7349 10 97310A118 11.72

M14 15.0 44.0 2.7-3.3 Rockwell B75 DIN 9021 25 91100A250 13.63

M16 17.0 40.0 5.4-6.6 Rockwell B76 DIN 7349 10 97310A119 10.00

M16 17.0 50.0 2.7-3.3 Rockwell B56 DIN 9021 25 91100A200 15.89

M18 19.0 44.0 7.0-9.0 Rockwell B76 DIN 7349 5 97310A121 9.43

M18 20.0 56.0 3.4-4.6 Rockwell B56 DIN 9021 10 91100A210 15.40

M20 21.0 44.0 7.0-9.0 Rockwell B76 DIN 7349 5 97310A122 10.29

M20 22.0 60.0 3.4-4.6 Rockwell B56 DIN 9021 10 91100A220 17.97

M22 23.0 50.0 7.0-9.0 Rockwell B76 DIN 7349 5 97310A123 14.29

M24 25.0 50.0 9.0-11.0 Rockwell B76 DIN 7349 1 97310A124 4.00

M24 26.8 72.0 4.0-6.0 Rockwell B53 DIN 9021 1 91100A230 4.47

M27 28.0 60.0 9.0-11.0 Rockwell B76 DIN 7349 1 97310A125 6.86

M30 31.0 68.0 9.0-11.0 Rockwell B76 DIN 7349 1 97310A126 5.71

Black Ultra-Corrosion-Resistant-Coated Steel

M4 4.3 12.0 0.9-1.1 Rockwell B56 DIN 9021, ISO 7093 5 93413A211 6.67

M5 5.3 15.0 1.0-1.4 Rockwell B56 DIN 9021, ISO 7093 5 93413A212 6.82

M6 6.4 18.0 1.4-1.8 Rockwell B56 DIN 9021, ISO 7093 5 93413A213 7.71

M8 8.4 24.0 1.8-2.2 Rockwell B56 DIN 9021, ISO 7093 5 93413A214 8.24

M10 10.5 30.0 2.3-2.7 Rockwell B56 DIN 9021, ISO 7093 5 93413A215 10.16

M12 13.0 37.0 2.7-3.3 Rockwell B56 DIN 9021, ISO 7093 1 93413A216 2.24

M14 15.0 44.0 2.7-3.3 Rockwell B56 DIN 9021, ISO 7093 1 93413A217 3.18

Blue-Dyed Steel

M6 7.0 13.6 2.7-4.0 Rockwell C38 __ 25 93162A310 12.26

M8 9.0 17.0 2.5-3.5 Rockwell C38 __ 50 93162A320 24.57

M10 11.0 21.5 3.0-4.5 Rockwell C38 __ 25 93162A330 14.58

M12 14.0 27.0 3.1-4.8 Rockwell C38 __ 10 93162A340 6.35

M16 18.0 34.0 3.1-4.6 Rockwell C38 __ 5 93162A350 7.29

M20 22.0 42.0 3.1-4.6 Rockwell C38 __ 5 93162A360 6.74

M24 26.0 50.0 3.4-4.6 Rockwell C38 __ 5 93162A370 11.09

M30 33.0 60.0 3.4-4.6 Rockwell C38 __ 1 93162A380 3.62

M36 39.0 72.0 3.4-4.6 Rockwell C38 __ 1 93162A390 7.11

For Screw

Size ID,

mm OD,

mm Thick.,

mm Hardness Specifications Met Pkg.

Qty. Pkg.

18-8 Stainless Steel

M2 2.2 7.0 0.6-1.0 Rockwell B75 DIN 9021 100 91116A240 $2.40

M2.5 2.7 8.0 0.7-0.9 Rockwell B52 DIN 9021 100 91116A110 4.23

M3 3.2 8.0 1.5-2.4 Rockwell B83 __ 1 93849A101 1.14

M3 3.2 9.0 0.7-0.9 Rockwell B52 DIN 9021 100 91116A120 4.93

M3 3.2 9.0 0.9-1.1 Not Rated DIN 7349 100 97310A127 5.71

M3 3.2 12.0 2.5-3.4 Rockwell B83 __ 1 94768A101 3.87

M4 4.3 10.0 1.5-2.4 Rockwell B83 __ 1 93849A102 1.14

M4 4.3 12.0 0.9-1.1 Rockwell B52 DIN 9021 100 91116A130 8.43

M4 4.3 12.0 1.4-1.8 Not Rated DIN 7349 100 97310A128 11.43

M4 4.3 14.0 2.5-3.4 Rockwell B83 __ 1 94768A102 3.89

M5 5.3 11.0 1.5-2.4 Rockwell B83 __ 1 93849A103 1.27

M5 5.3 15.0 1.0-1.4 Rockwell B52 DIN 9021 100 91116A140 16.00

M5 5.3 15.0 1.8-2.2 Not Rated DIN 7349 100 97310A129 12.86

M5 5.3 15.0 3.0-3.9 Rockwell B83 __ 1 94768A103 5.52

M6 6.4 13.0 2.0-2.9 Rockwell B83 __ 1 93849A104 1.42

M6 6.4 17.0 2.7-3.3 Not Rated DIN 7349 50 97310A131 14.29

M6 6.4 18.0 1.4-1.8 Rockwell B52 DIN 9021 50 91116A150 15.28

M6 6.4 18.0 4.0-4.9 Rockwell B83 __ 1 94768A104 6.23

M7 7.4 22.0 1.8-2.2 Rockwell B75 DIN 9021 25 91116A250 8.00

M8 8.4 16.0 2.5-3.4 Rockwell B83 __ 1 93849A105 1.42

M8 8.4 21.0 3.7-4.3 Not Rated DIN 7349 25 97310A132 12.86

M8 8.4 22.0 4.5-5.4 Rockwell B83 __ 1 94768A105 6.70

M8 8.4 24.0 1.8-2.2 Rockwell B52 DIN 9021 25 91116A160 13.25

M10 10.5 19.0 2.5-3.4 Rockwell B83 __ 1 93849A106 1.50

M10 10.5 23.0 4.5-5.4 Rockwell B83 __ 1 94768A106 7.10

M10 10.5 25.0 3.7-4.3 Not Rated DIN 7349 10 97310A133 6.28

M10 10.5 30.0 2.3-2.7 Rockwell B52 DIN 9021 10 91116A170 8.74

M12 13.0 22.0 2.5-3.4 Rockwell B83 __ 1 93849A107 1.54

M12 13.0 26.0 4.5-5.4 Rockwell B83 __ 1 94768A107 8.12

M12 13.0 30.0 5.4-6.6 Not Rated DIN 7349 10 97310A134 12.57

M12 13.0 37.0 2.7-3.3 Rockwell B52 DIN 9021 10 91116A180 18.94

M14 15.0 25.0 2.5-3.4 Rockwell B83 __ 1 93849A108 2.05

M14 15.0 27.0 4.5-5.4 Rockwell B83 __ 1 94768A108 10.83

M14 15.0 36.0 5.4-6.6 Not Rated DIN 7349 5 97310A135 9.43

M14 15.0 44.0 2.7-3.3 Rockwell B75 DIN 9021 1 91116A019 2.62

M16 17.0 28.0 3.0-3.9 Rockwell B83 __ 1 93849A109 2.52

M16 17.0 32.0 4.5-5.4 Rockwell B83 __ 1 94768A109 12.41

M16 17.0 40.0 5.4-6.6 Not Rated DIN 7349 5 97310A136 10.29

M16 17.0 50.0 2.7-3.3 Rockwell B52 DIN 9021 5 91116A200 16.80

M18 20.0 56.0 3.4-4.6 Rockwell B75 DIN 9021 1 91116A210 5.24

M20 21.0 35.0 3.0-3.9 Rockwell B83 __ 1 93849A110 2.68

M20 21.0 35.0 4.5-5.4 Rockwell B83 __ 1 94768A110 15.84

M20 21.0 44.0 7.0-9.0 Not Rated DIN 7349 1 97310A137 3.43

M20 22.0 60.0 3.4-4.6 Rockwell B52 DIN 9021 1 91116A220 4.76

M24 25.0 40.0 3.5-4.4 Rockwell B83 __ 1 93849A111 4.77

M24 25.0 43.0 6.0-6.9 Rockwell B83 __ 1 94768A111 19.12

M24 25.0 50.0 9.0-11.0 Not Rated DIN 7349 1 97310A138 6.57

M24 26.0 72.0 4.0-6.0 Rockwell B68 DIN 9021 1 91116A230 4.58

M30 31.0 44.0 3.5-4.4 Rockwell B83 __ 1 93849A112 6.31

M30 31.0 48.0 6.0-6.9 Rockwell B83 __ 1 94768A112 27.19

M36 37.0 50.0 4.5-5.4 Rockwell B83 __ 1 93849A113 20.11

17-7 PH Stainless Steel

M2 2.2 7.0 0.6-1.0 Rockwell C40 DIN 9021 10 91860A060 7.57

M3 3.2 9.0 0.7-0.9 Rockwell C40 DIN 9021 10 91860A068 11.34

M6 7.0 13.6 2.7-4.0 Rockwell C40 DIN 9021 1 91860A077 13.97

M8 8.4 22.0 4.5-5.4 Rockwell C40 DIN 9021 1 91860A078 17.29

Black-Oxide 18-8 Stainless Steel

M2 2.2 7.0 0.6-1.0 Rockwell B68 DIN 9021 10 91116A310 12.03

M2.5 2.7 8.0 0.7-0.9 Rockwell B68 DIN 9021 10 91116A320 12.03

M3 3.2 9.0 0.7-0.9 Rockwell B68 DIN 9021 10 91116A330 12.41

M4 4.3 12.0 0.9-1.1 Rockwell B68 DIN 9021 10 91116A340 12.59

M5 5.3 15.0 1.0-1.4 Rockwell B68 DIN 9021 10 91116A350 14.03

M6 6.4 18.0 1.4-1.8 Rockwell B68 DIN 9021 10 91116A360 13.97

M7 7.4 22.0 1.8-2.2 Rockwell B68 DIN 9021 10 91116A370 13.34

M8 8.4 24.0 1.8-2.2 Rockwell B68 DIN 9021 5 91116A380 7.28

M10 10.5 30.0 2.3-2.7 Rockwell B68 DIN 9021 5 91116A390 11.00

M12 13.0 37.0 2.7-3.3 Rockwell B68 DIN 9021 1 91116A410 2.53

M14 15.0 44.0 2.7-3.3 Rockwell B68 DIN 9021 1 91116A420 2.88

M16 17.0 50.0 2.7-3.3 Rockwell B68 DIN 9021 1 91116A430 3.22

M18 20.0 56.0 3.4-4.6 Rockwell B68 DIN 9021 1 91116A440 4.34

M20 22.0 60.0 3.4-4.6 Rockwell B68 DIN 9021 1 91116A450 4.79

316 Stainless Steel

M2 2.2 7.0 0.6-1.0 Rockwell B75 DIN 9021 100 95211A260 4.17

M2.5 2.7 8.0 0.7-0.9 Rockwell B75 DIN 9021 100 95211A110 9.52

M3 3.2 9.0 0.7-0.9 Rockwell B75 DIN 9021 50 95211A120 4.76

M4 4.3 12.0 0.9-1.1 Rockwell B75 DIN 9021 50 95211A140 5.71

M5 5.3 15.0 1.0-1.4 Rockwell B75 DIN 9021 50 95211A150 10.00

M6 6.4 18.0 1.4-1.8 Rockwell B75 DIN 9021 25 95211A160 7.74

M7 7.4 22.0 1.8-2.2 Rockwell B75 DIN 9021 10 95211A270 7.99

M8 8.4 24.0 1.8-2.2 Rockwell B75 DIN 9021 10 95211A180 6.67

M10 10.5 30.0 2.3-2.7 Rockwell B75 DIN 9021 5 95211A190 6.21

M12 13.0 37.0 2.7-3.3 Rockwell B75 DIN 9021 1 95211A200 2.48

M14 15.0 44.0 2.7-3.3 Rockwell B75 DIN 9021 1 95211A210 3.77

M16 17.0 50.0 2.7-3.3 Rockwell B75 DIN 9021 1 95211A220 4.29

M18 20.0 56.0 3.4-4.6 Rockwell B75 DIN 9021 1 95211A230 7.38

M20 22.0 60.0 3.4-4.6 Rockwell B75 DIN 9021 1 95211A240 7.62

M24 26.8 72.0 4.0-6.0 Rockwell B68 DIN 9021 1 95211A250 5.75

Bumax 88 Stainless Steel

M6 6.4 18.0 1.4-1.8 Rockwell B91 DIN 9021, ISO 7093 5 94316A510 6.18

M8 8.4 24.0 1.8-2.2 Rockwell B91 DIN 9021, ISO 7093 5 94316A520 8.80

M10 10.5 30.0 2.3-2.7 Rockwell B91 DIN 9021, ISO 7093 1 94316A530 2.95

M12 13.0 37.0 2.7-3.3 Rockwell B91 DIN 9021, ISO 7093 1 94316A540 5.87