MIL-DTL-512C
TABLE III. Particle distribution.
Classes
Density (g/cm³)
Size ranges mesh¹ (µm)
Weight %
+325 mesh (>44)
1.0 max.
1
0.30 max.
-325 mesh (<44)
99.0 min.
+325 mesh (>44)
6.0 max.
2
No determination
-325 mesh (<44)
94.0 min.
+100 mesh (>149)
0.2 max.
2A
No determination
-100 to +200 mesh (149 - 74)
20.0 max.
-200 mesh (<74)
80.0 min.
+100 mesh (>149)
0.2 max.
-100 to +200 mesh (149 - 74)
15.0 max.
3
0.50 max.
-200 to +325 mesh (74 - 44)
15.0 max.
-325 mesh (<44)
80.0 min.
+50 mesh (>297)
0.0
-50 to +100 mesh (297 - 149)
3.0 max.
4
0.90 min.
-100 to +200 mesh (149 - 74)
3.0 - 20.0
-200 mesh (<74)
80.0 - 97.0
+20 mesh (>840)
2.0 max.
30.0 max.
-20 to +100 mesh (840 - 149)
4A
0.90 min.
-100 to +200 mesh (149 - 74)
65.0 max.
-200 mesh (<74)
30.0 - 60.0
+12 mesh (>1680)
0.0
5
0.90 min.
-12 to +30 mesh (1680 - 590)
13.0 - 26.0
-30 mesh (<590)
74.0 - 87.0
+30 mesh (>590)
13.0 - 26.0
-30 to +50 mesh (590 - 297)
35.0 - 45.0
5A
0.90 min.
-50 to +140 mesh (297 - 105)
30.0 - 46.0
-140 mesh (<105)
3.0 max.
+100 mesh (>149)
2.0 max.
-100 to +200 mesh (149 - 74)
20.0 max.
6
0.95 to 1.20
-200 to +325 mesh (74 - 44)
10.0 - 35.0
-325 mesh (<44)
65.0 - 90.0
+40 mesh (>420)
0.5 max.
7
0.95 min.
-325 mesh (<44)
25.0 - 50.0
+12 mesh (>1680)
0.5 max.
8
0.95 min.
-325 mesh (<44)
35.0 max.
¹A + sign means particles are larger than the nominal sieve size. A - sign means particles are smaller
than the nominal sieve size.
3.4 Apparent density. The apparent density in grams per cubic centimeter shall conform
to the requirements of table III when tested as specified in 4.4.2.4.
4. VERIFICATION
4.1 Classification of inspection. The inspection requirements specified herein are
classified as conformance inspection (see 4.3).
4
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