Brass Flat Washers

Brass Flat Washers

Round Flat Washers in Solid Brass


  • Brass flat washers are made of Dezincification resistant (DZR or DR) brass
  • Normal brass flat washers do not meet this standard and have high corrosion risk
  • Brass flat washers are suitable for high water temperatures, deviating water qualities (soft water) or where chloride is present
  • DZR-brass is excellent in water boiler systems

Please note that color and sheen may vary for brass and silicon bronze fasteners.


Flat Washer Sizes ID OD Thickness
#2 0.099" 0.187" 0.020"
#3 0.101" 0.250" 0.020"
#4 0.120" 0.281" 0.025"
#5 0.133" 0.281" 0.025"
#6 - S 0.147" 0.312" 0.025"
#6 - L 0.147" 0.375" 0.032"
#8 - S 0.172" 0.375" 0.032"
#8 - L 0.172" 0.437" 0.036"
#10 - S 0.200" 0.437" 0.036"
#10 - L 0.200" 1/2" 0.040"
#12 - S 0.228" 1/2" 0.040"
#12 - L 0.228" 0.562" 0.040"
1/4" - S 0.260" 0.562" 0.040"
1/4" - L 0.260" 0.687" 0.051"
#16 - S 0.281" 5/8" 0.040"
#16 - L 0.281" 3/4" 0.062"
#18 - S 0.310" 0.687" 0.051"
#18 - L 0.310" 7/8" 0.062"
Flat Washer Sizes ID OD Thickness
5/16" - S 0.340" 3/4" 0.062"
5/16" - L 0.340" 7/8" 0.062"
3/8" - S 0.392" 7/8" 0.062"
3/8" - L 0.392" 1" 0.081"
7/16" 0.500" 1-1/8" 0.081"
1/2" - S 0.562" 1-1/8" 0.081"
1/2" - L 0.562" 1-3/8" 0.091"
9/16" 0.625" 1-1/2" 0.091"
5/8" - S 0.687" 1-1/2" 0.102"
5/8" - L 0.687" 1-3/4" 0.102"
3/4" - S 0.812" 1-7/8" 0.114"
3/4" - L 0.812" 2" 0.114"
7/8" - S 0.937" 2.25" 0.128"
1" 1.062" 2" 0.125"
1-1/8" 1.187" 2-1/2" 0.125"
1-1/4" 1.312" 2-3/4" 0.125"
1-1/2" 1.562" 3-1/4" 0.140"
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