18-8 SS Flat Washer
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18-8 SS Flat Washer

18-8 stainless steel commercial 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. Commercial flat washers generally have a larger outer diameter than SAE (Society of Automotive Engineers) flat washers, and can be utilized in nearly any application. 18-8 stainless steel fasteners are commonly used in applications that require general atmospheric corrosion resistance, such as chemical and food processing equipment. Stainless steel has a higher corrosion resistance than carbon steel.

18-8 SS Flat Washer
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Diameter Inside Diameter Outside Diameter Thickness Item # Availability Price Quantity UOM
#4 0.1150 0.3125 0.0310 WFS4 4 In Stock $0.0159/EA EA
#6 0.1563 0.3750 0.0310 WFS4 6 In Stock $0.01847/EA EA
#8 0.1719 0.3750 0.0310 WFS4 8 In Stock $0.01389/EA EA
#10 0.2031 0.3750 0.05 WFS4 10 In Stock $0.01749/EA EA
#12 0.25 0.5625 0.05 WFS4 12 In Stock $0.02072/EA EA
1/4 0.2810 0.6250 0.05 WFS4025 In Stock $0.02615/EA EA
5/16 0.3430 0.75 0.05 WFS4031 In Stock $0.037/EA EA
3/8 0.4060 0.8750 0.05 WFS4037 In Stock $0.04842/EA EA
7/16 0.5 1.1250 0.0620 WFS4043 In Stock $0.08719/EA EA
1/2 0.5310 1.25 0.0620 WFS4050 In Stock $0.11456/EA EA
9/16 0.6250 1.3750 0.0780 WFS4056 In Stock $0.34492/EA EA
5/8 0.6870 1.5 0.0780 WFS4062 In Stock $0.20617/EA EA
3/4 0.8120 1.8750 0.1090 WFS4075 In Stock $0.33215/EA EA
7/8 0.9370 2.0 0.1090 WFS4087 In Stock $0.42662/EA EA
1 1.0620 2.0 0.1250 WFS4100 In Stock $0.53194/EA EA
1 1/8 1.1870 2.5 0.1250 WFS4112 In Stock $0.8522/EA EA
1 1/4 1.3120 2.75 0.1250 WFS4125 In Stock $0.94911/EA EA
1 3/8 1.5 3.25 0.14 WFS4137 In Stock $4.84512/EA EA
1 1/2 1.5620 3.25 0.14 WFS4150 In Stock $1.3075/EA EA
1 5/8 1.75 3.75 0.18 WFS4162 In Stock $4.70622/EA EA
1 3/4 1.8120 3.5 0.14 WFS4175 In Stock $3.82173/EA EA
2 2.1250 4.0 0.1870 WFS4200 In Stock $7.24505/EA EA