ASTM F884 Washer

STANDARD WASHERS

Washers provide a smooth bearing surface and are used under the head of a bolt and/or a nut. Flat washers are covered under the ASTM specification F844. These washers are unhardened and intended for general use.

Chemical Requirements
Washers shall be steel, and unless otherwise specified, are not furnished to any chemical composition requirements.

Mechanical Properties
Unless otherwise specified, F844 washers are not furnished to any mechanical requirements.

Dimensional Requirements
Washers are typically supplied per ASME B18.2.1, standard flat washer dimensions.


Dimensions per ASME B18.2.1

Bolt Size

A

B

C

Weight (lbs.) Per 100 Pieces

Inside Diameter

Outside Diameter

Thickness

1⁄2

9⁄16

13⁄8

0.109

4

5⁄8

11⁄16

13⁄4

0.134

8

3⁄4

13⁄16

2

0.148

11

7⁄8

15⁄16

21⁄4

0.165

15

1

11⁄16

21⁄2

0.165

19

11⁄8

11⁄4

23⁄4

0.165

22

11⁄4

13⁄8

3

0.165

26

13⁄8

11⁄2

31⁄4

0.180

33

11⁄2

15⁄8

31⁄2

0.180

38

15⁄8

13⁄4

33⁄4

0.180

43

13⁄4

17⁄8

4

0.180

50

17⁄8

2

41⁄4

0.180

57

2

21⁄8

41⁄2

0.180

63

21⁄4

23⁄8

43⁄4

0.220

83

21⁄2

25⁄8

5

0.238

96

23⁄4

27⁄8

51⁄4

0.259

110

3

31⁄8

51⁄2

0.284

130

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