MIL-DTL-197L
the contract or purchase order, would require marking in accordance with contract requirements
(see 6.2).
3.12.6 Method 20B labeling. In addition to the required markings on containers,
bearings unit-protected to method 20B shall be labeled as follows:
a. A label shall be affixed to the outermost circumference (tapered rollers may be
packed separately) of the bearing after the bearing has been foil wrapped.
b. Printing on the label shall be readable through the strippable compound applied at the
hot dip operation.
3.12.7 Method 40B labeling. In addition to required markings on containers, bearings
unit-protected to method 40B shall be permanently marked with the NSN and date packaged.
The marking may be printed directly onto the plastic or may be applied as a label. The label, if
used, shall be compatible with the plastic and shall not be affected by the lubricant or
preservative compound. Labels shall be sealed between layers of the transparent material around
the outer circumference of the bearing. If the label obscures more than 50-percent of the outer
circumference of the bearing, it shall be of a transparent material.
3.12.8 Workmanship. Workmanship shall be such that when the proper process and
procedure are followed, materials and items shall be protected against corrosion, deterioration,
and damage during handling, shipment, storage, and require minimum processing for service.
3.12.9 Lot numbers. Bearing manufacturers' lot numbers shall be shown on the unit and
exterior container labels for every lot of packaged bearings. Lot numbers are not required when
bearings are serialized (see 3.12.10).
3.12.10 Serial numbers. Bearing serial numbers shall be shown on the unit-marking
label as well as on the bearings.
3.12.11 Matched sets. Individually packaged bearings constituting a set shall be taped
together with transparent pressure-sensitive tape before the insertion into the unit package, heat
sealed together as a set, or the individual unit package of a set shall be taped together so
markings are not obscured. In all cases, the unit package shall be marked with the following
caution: "MATCHED SET, DO NOT SEPARATE". These bearings shall not be separated for
individual issue, but shall be issued and used as a single unit.
3.12.12 Bearing nomenclature marking. The bearing nomenclature, as specified in the
contract or purchase order, shall be included on the packaging and packing container (see 6.2).
3.12.13 Preservation method marking. The preservation method code shall be marked
on the unit pack label in accordance with MIL-STD-129.
3.13 Recycled, recovered, or environmentally preferable materials. Recycled, recovered,
or environmentally preferable materials should be used to the maximum extent possible,
provided that the material meets or exceeds the operational and maintenance requirements, and
promotes economically advantageous life cycle costs.
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