Malleable iron washers are primarily used in dock & wood construction. These washers are oversized with a large bearing surface that is designed to check bolt heads and nuts pulling into the wood.

Stock

Diameters: 1/2″ – 1″
Origin: Domestic (no keyhole) and Import (keyhole)
Finish: Plain 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
Plain Galvanized Plain Galvanized
1⁄2 21⁄2 1⁄4 22 19728 19729 11983 11984
5⁄8 23⁄4 5⁄16 32 19730 19731 11985 11986
3⁄4 3 7⁄16 42 19732 19733 11987 11988
7⁄8 31⁄2 7⁄16 55 19734 19735 11989 11990
1 33⁄4 1⁄2 63 19736 19737 11991 11992
11⁄8 41⁄2 1⁄2 96 - - 18404 18406
11⁄4 5 9⁄16 121 - - 11995 11996
11⁄2 6 3⁄4 187 - - 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 Baseline Bolt sales representative to check the dimensions of current inventory prior to ordering.