MIL-DTL-11891G(AT)
3.1.4 Qualified products list. Type I and type II track shoe assemblies, track shoe sets,
track shoe pads, and type III bushings furnished under this specification shall be products which
are qualified for listing on the applicable qualified products list at the time set for opening of bids.
Qualification for all systems/components includes the contractor's plan, all materials, processes,
tests, facilities, and assembly, as applicable, of these systems or components. The contractor is
responsible for the entire component/assembly being submitted for qualification and subsequent
production including all metal parts and fasteners.
3.1.5 Approval for the rebuild/overhaul of track components. Contractors/military depots
which desire to obtain approval for the rebuild of track or track components covered by this
specification must utilize this specification in conjunction with the current Depot Maintenance
Work Requirement (DMWR) for single pin and double pin track used on military vehicles. This
specification should be used to specify requirements for rubber and rubber processing. The
DMWR should address the quality of the rebuilt/overhaul metal components.
3.2 Phase I, plant/facilities inspection. Defense Standardization and Specification
Program SD-6, "Provisions Governing Qualification (Qualified Products Lists)" and
DOD 4120.3-M, "Defense Standardization Program Policies and Procedures", authorizes the
preparing activity or its authorized agent to conduct plant/facility inspections prior to the start of
any qualification testing. Subcontractors that provide uncured rubber for processing by the
contractor requesting qualification shall be subjected to the same inspection and test requirements
on that portion of the product/process that is within the subcontractor's purview.
3.3 Phase II, establishment of contractor's control plan and compound characteristics.
Prior to the start of qualification hardware fabrication, the contractor shall establish a Process
Fingerprint Plan (see tables I and II, and 4.5.2.4) that describes the entire process used to produce
the qualification hardware. This plan shall identify the target values and ranges (limits/tolerances)
the contractor expects during qualification hardware fabrication. This plan shall address all the
requirements of this specification and adequately describe the process and product supplied for
qualification. This plan shall bear the signatures of the Government QAR and an authorized
representative of the contractor. This plan shall remain at the contractor's facility but be made
available for review by the preparing activity or its authorized agent. This information shall not be
disclosed in whole or in part for any purpose other than to evaluate the product submitted for
qualification testing.
3.3.1 Qualification hardware fabrication. The fabrication of the qualification hardware
shall be in accordance with the approved Process Fingerprint Plan (see 3.3). All testing must be
conducted in the presence of a government inspector or its authorized agent, signed off for
conformance to the requirements and dated. This plan and test data generated during the
fabrication of elastomeric components for qualification will be used by the Government as a
measure of conformance/performance in future production contracts (see 3.4.1.2) and will remain
proprietary to the contractor. All records/test results of all lots of elastomeric materials used in
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