Eight inch brass screens owned by the ARF manufactured by Fisher, Hogentogler, Newark, and Tyler. We also have one 8" lid and two 8" bottom pans (a half height and a full height).

Number in ARF 
Inventory		 Bureau of Standards
Sieve Number		 Specified
Sieve Opening		 Specified
Wire Diameter
Inches
    Inches Microns  
  4 .187 4760 .050
  5 .157 4000 .044
  6 .132 3360 .040
  7 .111 2830 .036
  8 .0937 2380 .0331
1 10 .0787 2000 .0299
1 12 .0661 1680 .0272
  14 .0555 1410 .0240
  16 .0469 1190 .0213
1 18 .0394 1000 .0189
  20 .0331 840 .0165
  25 .0280 710 .0146
  30 .0232 590 .0130
1 35 .0197 500 .0114
  40 .0165 420 .0098
  45 .0138 350 .0087
  50 .0117 297 .0074
1 60 .0098 250 .0064
  70 .0083 210 .0055
  80 .0070 177 .0047
  100 .0059 149 .0040
1 120 .0049 125 .0034
1 140 .0041 105 .0029
  170 .0035 88 .0025
  200 .0029 74 .0021
3 230 .0024 63 .0018
1 270 .0021 53 .0016
  325 .0017 44 .0014

Table from http://www.wirecloth.com/howto/convert/ussieve.html