Fender Washer, Plated
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Fender Washer, Plated

Fender washers are flat washers with a larger outer diameter in proportion to its center hole. Used where an extra wide bearing surface is required. Flat washers are used under bolt heads or nuts to increase the bearing surface area, or to offer protection so that the nut or bolt can be rotated without distortion of the bearing surface. Flat washers are also used to give tightness to a joint, to prevent leakage, and especially to distribute pressure under the head of a bolt or nut. Dimensional specifications are governed by ASME B18.21.1. Fender washers were originally designed for auto body repair work, they are also used in sheet metal, plumbing, and electrical work. Also used to attach signs to posts, to install drywall and wood paneling. Available in zinc plated finish. Zinc plating sacrifices itself, corroding before the base material, offering added corrosion resistance.

Governing StandardsFender Washer

ASME B18.21.1 Covers the dimensional requirements, physical properties, and related test methods for helical spring-lock washers (#0 through 3 inches), tooth-lock washers (#2 through 1 ¼ inches), and plain washers (#0 through 3 inches).

Dimensional SpecificationsFender Washer

Fender washer dimensions
Per ASME B18.21.1-2009
Full Size A B C
Inside
Diameter
Outside
Diameter
Mean Section
Thickness
#6 X 5/8 0.1600 0.6250 0.0650
#6 X 3/4 0.1600 0.7500 0.0650
#8 X 7/8 0.1900 0.8750 0.0650
#10 X 3/4 0.1900 0.7500 0.0650
#10 X 1 0.1900 1.0000 0.0650
#10 X 1 1/4 0.1900 1.2500 0.0650
#10 X 1 1/2 0.1900 1.5000 0.0650
1/4 X 1 0.2850 1.0000 0.0650
1/4 X 1 1/4 0.2850 1.2500 0.0650
1/4 X 1 1/2 0.2850 1.5000 0.0650
1/4 X 1 3/4 0.2850 1.7500 0.0650
1/4 X 2 0.2850 2.0000 0.0650
5/16 X 7/8 0.3480 0.8750 0.0650
5/16 X 1 0.3480 1.0000 0.0650
5/16 X 1 1/4 0.3480 1.2500 0.0650
5/16 X 1 1/2 0.3480 1.5000 0.0650
5/16 X 1 5/8 0.3480 1.7500 0.0650
5/16 X 1 3/4 0.3480 1.6250 0.0650
5/16 X 2 0.3480 2.0000 0.0650
3/8 X 1 1/4 0.4100 1.2500 0.0650
3/8 X 1 1/2 0.4100 1.5000 0.0650
3/8 X 1 5/8 0.4100 1.6250 0.0650
3/8 X 1 3/4 0.4100 1.7500 0.0650
3/8 X 2 0.4100 2.0000 0.0650
1/2 X 1 1/4 0.5350 1.2500 0.0650
1/2 X 1 1/2 0.5350 1.5000 0.0650
1/2 X 1 3/4 0.5350 1.7500 0.0650
1/2 X 2 0.5350 2.0000 0.0650
1/2 X 2 1/2 0.5350 2.5000 0.0650
  1. All dimensions are in inches.
Fender Washer, Plated
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Diameter Inside Diameter Outside Diameter Thickness Item # Availability Price Quantity UOM
#6 0.16 0.6250 0.0650 WFFP 60062 3-5 Working Days $0.04145/EA EA
#10 0.19 1.0 0.0650 WFFP 100100 In Stock $0.04642/EA EA
1/4 0.2850 1.0 0.0650 WFFP0250100 In Stock $0.09192/EA EA
1/4 0.2850 1.25 0.0650 WFFP0250125 In Stock $0.06157/EA EA
1/4 0.2850 1.5 0.0650 WFFP0250150 In Stock $0.13441/EA EA
1/4 0.2850 2.0 0.0650 WFFP0250200 In Stock $0.26028/EA EA
5/16 0.3480 1.25 0.0650 WFFP0310125 In Stock $0.04998/EA EA
5/16 0.3480 1.5 0.0650 WFFP0310150 In Stock $0.0792/EA EA
3/8 0.41 1.25 0.0650 WFFP0370125 In Stock $0.06294/EA EA
3/8 0.41 1.5 0.0650 WFFP0370150 In Stock $0.09725/EA EA
3/8 0.41 2.0 0.0650 WFFP0370200 In Stock $0.17647/EA EA
1/2 0.5350 1.5 0.0650 WFFP0500150 In Stock $0.09808/EA EA
1/2 0.5350 2.0 0.0650 WFFP0500200 In Stock $0.18164/EA EA