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.

Stock

Diameters: 1/2″ – 3″

Origin: Import

Finish: Plain and hot-dip galvanized

Manufacturing

Portland Bolt has the ability to manufacture or provide nonstandard square, rectangular, or round washers meeting the requirements of ASTM A36, A572 Grade 50, or F436.

Dimensions

Click table to show drawingStandard Flat Washer
Bolt Size A B C Weight (lbs.) Per 100 Pieces Part numbers
Inside Diameter Outside Diameter Thickness Import
Plain Galvanized
1⁄2 9⁄16 13⁄8 0.109 4 19794 19795
5⁄8 11⁄16 13⁄4 0.134 8 19796 19797
3⁄4 13⁄16 2 0.148 11 19798 19799
7⁄8 15⁄16 21⁄4 0.165 15 19800 19801
1 11⁄16 21⁄2 0.165 19 19802 19803
11⁄8 11⁄4 23⁄4 0.165 22 19804 19805
11⁄4 13⁄8 3 0.165 26 19806 19807
13⁄8 11⁄2 31⁄4 0.180 33 19808 19809
11⁄2 15⁄8 31⁄2 0.180 38 19810 19811
15⁄8 13⁄4 33⁄4 0.180 43 - -
13⁄4 17⁄8 4 0.180 50 19812 19813
17⁄8 2 41⁄4 0.180 57 - -
2 21⁄8 41⁄2 0.180 63 19814 19815
21⁄4 23⁄8 43⁄4 0.220 83 16434 16435
21⁄2 25⁄8 5 0.238 96 16436 16437
23⁄4 27⁄8 51⁄4 0.259 110 16670 16671
3 31⁄8 51⁄2 0.284 130 16438 16439
Dimensions per ASME B18.21.1