MIL-DTL-26521L
3. REQUIREMENTS
3.1 First article. When specified (see 6.2), samples shall be subjected to first article inspection in
accordance with 4.4.
3.2 Materials. Materials shall be as specified herein and shall conform to all applicable specification
sheets. When a definite material is not specified, a material shall be used which will enable the fitting or
sleeve to meet the requirements of this specification. Acceptance or approval of any constituent material
shall not be construed as a guarantee of acceptance of the finished product.
3.3 Components. The complete hose assembly shall consist of the basic hose and two non-reusable
male connectors. Each male fitting is attached to each end of the hose and one-time use protective
shipping caps shall be supplied for each male connector to prevent the entrance of dirt and other foreign
matter (see figure 1).
FIGURE 1. Permanent type coupler.
3.4 Recycled, recovered, environmentally preferable or biobased materials. Recycled, recovered,
environmentally preferable, or biobased 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.
3.4.1 Recovered materials. For the purpose of this requirement, recovered materials are those
materials that have been collected from solid waste and reprocessed to become a source of raw
materials, as distinguished from virgin raw materials. The components, pieces and parts incorporated in
the fittings may be newly fabricated from recovered materials to the maximum extent practicable,
provided the fittings produced meets all other requirements of this specification. Used, rebuilt or
remanufactured components, pieces and parts shall not be incorporated in the fittings.
3.5 Hose. The hose shall consist of a synthetic rubber inner liner, synthetic braided, loomed, or plied
reinforcement laminated between rubber layers and a synthetic rubber cover (see figure 2).
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