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

12

916

138

0.109

4

58

1116

134

0.134

8

34

1316

2

0.148

11

78

1516

214

0.165

15

1

1116

212

0.165

19

118

114

234

0.165

22

114

138

3

0.165

26

138

112

314

0.180

33

112

158

312

0.180

38

158

134

334

0.180

43

134

178

4

0.180

50

178

2

414

0.180

57

2

218

412

0.180

63

214

238

434

0.220

83

212

258

5

0.238

96

234

278

514

0.259

110

3

318

512

0.284

130