Fortune Metal Finishing

Glass Bead

Glass beads are the most common abrasive for general finishing and cleaning. They are chemically inert and pose no environmental issues. Our "Mil" beads conform to current DOD approved MilSpec PRF 9954C. We stock a full assortment of sizes - coarse to fine - in sizes from US Standard Sieve 030-040 to US Standard Sieve 325 and finer.

Standard Glass Bead Specifications for sizes we stock

    Nominal Diameter  
  US Standard Inches Microns Min %
Part No. Sieve Max Min Max Min Round
             
Coarse            
MIL 4 030-040 0.0234 0.0165 600 425 70
MIL 5 040-050 0.0165 0.0117 425 300 70
C 040-060 0.0165 0.0098 425 250 75
MIL 6 050-070 0.0117 0.0083 300 212 80
AB 050-080 0.0117 0.0070 300 180 70
             
Medium            
MIL 8 070-100 0.0083 0.0059 212 150 80
AD 070-140 0.0083 0.0041 212 106 80
MIL 10 100-170 0.0059 0.0035 150 90 90
AE 100-170 0.0059 0.0035 150 90 85
MIL 11 120-200 0.0049 0.0029 125 75 90
             
Fine            
MIL 12 140-230 0.0041 0.0025 106 63 90
MIL 13 170-325 0.0035 0.0017 90 45 95
AH 170-325 0.0035 0.0017 90 45 85
AQ >325          
             
Mil Spec Beads conform to PRF-9954C