MIL-DTL-85069D
specifications should be followed. Tools are available to facilitate and ensure proper installation
of the sleeve or grommet.
6.1.2.1 General purpose and restrictions. The fastener sleeves and grommets will be
used to replace oversize shank fasteners for repair and maintenance. The sleeves and grommets
will be used with standard diameter straight shank fasteners. They will be used under the same
restrictions as oversize fasteners and in compliance with the specific user's repair procedures and
restrictions.
6.1.2.2 Number of fasteners. There will be no restrictions on the number of fasteners
installed with sleeves or grommets when the edge distance from the center of the hole is two
times the diameter and greater.
6.1.2.3 Fasteners. The fastener or attaching element (nut or collar) will contain a
counter-bore to accept the protrusion of the sleeve or grommet; or a washer will be used; or the
sleeve or grommet will be flush on the backside of the stackup.
6.1.2.4 Fastener restrictions. The fastener sleeves or grommets will not be used with
tapered shank fasteners or blind fasteners.
6.1.2.5. Interference. Interference (hole-to-sleeve) will be not greater than 0.003 inch
where the material thickness is less than 0.5 inch. Interference will be not greater than 0.0015
inch where material thickness is greater than 0.5 inch.
6.1.3 Applications. Appropriate engineering approval will be required in the following
applications:
a. In fluid containers having no self-sealing feature, as in fuel, oil, or water tanks.
b. Fatigue and fracture critical locations.
c. Where the edge distance from the center of the hole is less than 1.5 diameters.
d. Where the number of discrepant holes being repaired is greater than 10-percent of the
total number of holes in a pattern.
e. Where more than three adjacent holes are discrepant.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a.
Title, number, and date of this specification.
b.
PIN to include classification of sleeve or grommet required (see 1.3).
Conformance inspection requirements (see 3.1).
c.
d.
Surface texture exceptions (see 3.2.6).
AQL (see 4.2.1).
e.
f.
Packaging (see 5.1).
6
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