Malleable cast iron round washers are used in dock and wood construction. These oversized washers have a large bearing surface designed to prevent bolt heads and nuts from pulling into the wood.

Stock

Diameters: 3/8″ – 1″
Origin: Domestic (no keyhole) and Import (keyhole)
Finish: Black and hot-dip galvanized

Dimensions

Click table to show drawingMalleable Iron Washer
Bolt Size A T Weight (lbs.) Per 100 Pieces Part Numbers
Outside Diameter Thickness Gauge Domestic Import
Black Galvanized Black Galvanized
12 212 14 22 19728 19729 11983 11984
58 234 516 32 19730 19731 11985 11986
34 3 716 42 19732 19733 11987 11988
78 312 716 55 19734 19735 11989 11990
1 334 12 63 19736 19737 11991 11992
118 412 12 96 - - 18405 18406
114 5 916 121 19738 19739 11995 11996
112 6 34 187 - - 15751 15752
Reference ASTM A47 for general casting information.

Slight variations in thickness and outside diameter dimensions may exist from one lot of washers to another. If these dimensions are critical, ask your Portland Bolt sales representative to check the dimensions of current inventory prior to ordering.