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: 1/4″ – 3″ Origin: Domestic Finish: Black 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 Domestic Import
Black Galvanized Black Galvanized
12 916 138 0.109 4 16408 1609 19794 19795
58 1116 134 0.134 8 16410 16411 19796 19797
34 1316 2 0.148 11 16412 16413 19798 19799
78 1516 214 0.165 15 16414 16415 19800 19801
1 1116 212 0.165 19 16416 16417 19802 19803
118 114 234 0.165 22 16418 16419 19804 19805
114 138 3 0.165 26 16420 16421 19806 19807
138 112 314 0.180 33 16422 16423 19808 19809
112 158 312 0.180 38 16424 16425 19810 19811
158 134 334 0.180 43 16426 16427 - -
134 178 4 0.180 50 16428 16429 19812 19813
178 2 414 0.180 57 16430 16431 - -
2 218 412 0.180 63 16432 16433 19814 19815
214 238 434 0.220 83 - - 16434 16435
212 258 5 0.238 96 - - 16436 16437
234 278 514 0.259 110 - - 16670 16671
3 318 512 0.284 130 - - 16438 16439

Dimensions per ASME B18.21.1