MIL-PRF-9954D
3. REQUIREMENTS
3.1 Composition. The glass bead media shall not be recycled or recovered, but newly
manufactured from commercial grade soda lime glass, and shall contain less than 0.1 weight
percent crystalline silica. The glass beads shall contain no less than 62% amorphous silica (This
is not free silica and does not cause silicosis). The glass beads shall not contain more than 75
ppm Arsenic and 100 ppm Lead by Weight. (see 4.4.7)
3.2 Appearance and Roundness. The glass beads shall be spherical, free flowing, free of
defects, and free of foreign matter in accordance with high-grade commercial practice. No more
than 3% of any size shall be scored, broken or un-fused, angular glass particles (see 4.4.2). The
roundness of the glass beads shall be specified in Table 1 for each size.
3.3 Coating. No silicone or trace of silicone will be permissible on the glass beads (see
4.4.3).
3.4 Specific Gravity. The specific gravity of the glass beads shall be no less than 2.3 (see
4.4.4).
3.5 Magnetic Iron Particles. No more than 0.1% by weight of free magnetic iron particles
shall be permissible (see 4.4.5).
3.6 Sieve Analysis. The glass beads shall conform to the sieve analysis as specified in Table
1 when tested as specified (see 4.4.6).
4. VERIFICATION
4.1 Classification of Inspection. Unless otherwise specified in the contract or purchase order,
the supplier is responsible for the performance of all inspection requirements as specified herein.
Except as otherwise specified, the supplier may utilize his own facilities or any commercial
laboratory acceptable to the Government. The Government reserves the right to perform any of
the inspections set forth in the specification where such inspections are deemed necessary to
assure that supplies and services conform to prescribed requirements.
4.2 Conformance Inspection. Quality conformance tests shall consist of the following tests:
a.
Sieve analysis (see 4.4.6)
b.
Magnetic iron particles (see 4.4.5)
c.
Appearance and Roundness (see 4.4.2)
d.
Coating (see 4.4.3)
e.
Heavy Metals analysis (see 4.4.7)
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