6.3 Part or identifying number (PIN). The PIN to be used for engines acquired to this
specification are created as follows:
Vehicle used on designation
M809 - Chassis, Truck, 5 Ton, 6x6
M939 - Chassis, Truck, 5 Ton, 6x6
Prefix for military specification
6.4 First article. When requiring a first article inspection, contracting documents should
provide specific guidance to offerors. This guidance should cover whether the first article is a
first article sample, a first production item, or the number of test items. These documents should
also include specific instructions regarding arrangements for examinations, approval of first article
test results, and disposition of first articles. Pre-solicitation documents should provide
Government waiver rights for samples for first article inspection to bidders offering a previously
acquired or tested product. Bidders offering such products who wish to rely on such production
testing must furnish evidence with the bid that prior Government approval is appropriate for the
6.5 Conformance inspection. Affordable conformance inspection with confidence varies
depending upon a number of procurement risk factors. Some of these factors include: Contractor
past performance, Government schedules and budget, product material and design maturity,
manufacturing capital equipment and processes applied, the controlled uniformity of those
processes, labor skill and training, and the uniformity of measuring processes and techniques.
During the solicitation, contracting documents should indicate those tests desired from table II
and their designated frequency based on a risk assessment for the procurement.
6.6 Definitions. The following definitions shall be used for the classification of defects for
a. Class I. Leakage indicated by wetness or discoloration not great enough to form
b. Class II. Leakage great enough to form drops but not enough to cause drops to
drip from item being checked/inspected.
c. Class III. Leakage great enough to form drops that fall from the item being
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