Brass Flat Washer
Choose Favorites List

Brass Flat Washer

Brass 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. Brass fasteners are commonly used by electrical and communications industries, builders hardware and some marine applications. These washers provide corrosion resistance in wet environments, offer thermal and electrical conductivity, and are nonmagnetic.

Governing StandardsBrass Flat 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 SpecificationsBrass Flat Washer

Brass Flat Washer dimensions
Per ASME B18.21.1-2009
Size Nominal A B C
Inside
Diameter
Outside
Diameter
Mean Section
Thickness
#2 0.0860 0.9900 0.1870 0.0200
#4 0.1120 0.1200 0.2810 0.0250
#6 0.1380 0.1470 0.3120 0.0250
#8 0.1640 0.1720 0.3750 0.0320
#10 0.1900 0.2000 0.4370 0.0360
#12 0.2160 0.2280 0.5000 0.0400
1/4 0.2500 0.2600 0.5620 0.0400
5/16 0.3125 0.3400 0.7500 0.0620
3/8 0.3750 0.3920 0.8750 0.0620
7/16 0.4375 0.5000 1.1250 0.0810
1/2 0.5000 0.5620 1.2500 0.0910
9/16 0.5625 0.6250 1.5000 0.0910
5/8 0.6250 0.6870 1.5000 0.1020
3/4 0.7500 0.8120 1.8750 0.1140
7/8 0.8750 0.9370 2.2500 0.1280
1 1.0000 1.0620 2.5000 0.1440
1 1/8 1.1250 1.1870 2.7500 0.1560
1 1/4 1.2500 1.3120 3.0000 0.1560
1 1/2 1.5000 1.5620 3.5000 0.1560
  1. All dimensions are in inches.
Brass Flat Washer
View
Diameter Inside Diameter Outside Diameter Thickness Item # Availability Price Quantity UOM
#4 0.12 0.2810 0.0250 WFBR 4 In Stock $0.04888/EA EA
#6 0.1470 0.3120 0.0250 WFBR 6 In Stock $0.02407/EA EA
#8 0.1720 0.3750 0.0320 WFBR 8 In Stock $0.04414/EA EA
#10 0.2 0.4370 0.0360 WFBR 10 In Stock $0.0555/EA EA
#12 0.2280 0.5 0.04 WFBR 12 In Stock $0.19089/EA EA
1/4 0.26 0.5620 0.04 WFBR025 In Stock $0.1237/EA EA
5/16 0.34 0.75 0.0620 WFBR031 In Stock $0.16019/EA EA
3/8 0.3920 0.8750 0.0620 WFBR037 In Stock $0.4459/EA EA
7/16 0.5 1.1250 0.0810 WFBR043 In Stock $0.94731/EA EA
1/2 0.5620 1.25 0.0910 WFBR050 In Stock $0.93223/EA EA
5/8 0.6870 1.5 0.1020 WFBR062 In Stock $1.57282/EA EA
3/4 0.8120 1.8750 0.1140 WFBR075 In Stock $3.13507/EA EA
7/8 0.9370 2.25 0.1280 WFBR087 In Stock $6.82138/EA EA
1 1.0620 2.5 0.1440 WFBR100 In Stock $7.33532/EA EA
1 1/8 1.1870 2.75 0.1560 WFBR112 In Stock $8.23909/EA EA
1 1/4 1.3120 3.0 0.1560 WFBR125 In Stock $13.56094/EA EA