Specifications

71
Note that this standard is technically identical to ISO 11218.
Maximum contamination limits (particles per ml)
MTD >4μm(c) >6μm(c) >14μm(c) >21μm(c) >38μm(c) >70μm(c)
ACFTD >2μm >5μm >15μm >25μm >50μm >100μm
Size code A B C D E F
000 195 76 14 3 1 0
00 390 152 27 5 1 0
0 780 304 54 10 2 0
1 1,560 609 109 20 4 1
2 3,120 1,220 217 39 7 1
3 6,250 2,430 432 76 13 2
4 12,500 4,860 864 152 26 4
5 25,000 9,730 1,730 306 53 8
6 50,000 19,500 3,460 612 106 18
7 100,000 38,900 6,920 1,220 212 32
8 200,000 77,900 13,900 2,450 424 64
9 400,000 156,000 27,700 4,900 848 128
10 800,000 311,000 55,400 9,800 1,700 256
11 160,000 623,000 111,000 19,600 3,390 512
12 320,000 1,250,000 222,000 39,200 6,780 1,024
MTD ISO11171 (Calibration or optical microscope count – particle size based on projected area
equivalent diameter)
ACFTD ISO4402 (Calibration or optical microscope count – particle size based on longest dimension)
SAE AS4059 rev E Table