A-A-51313 Mask, OronasalThis commercial item description covers four (4) sizes of oronasal masks of two (2) types.

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COMMERCIAL ITEM DESCRIPTION A-A-51313

The electrical resistance of the moulded rubber shall not exceed 1 megohm when tested as specified.

Accelerated aging test. Mask shall be subjected to a temperature of 158^O ± 2 ^O F. for seven days in an air oven.

Electrical Conductivity test. The resistance between the electrodes shall be measured by any resistance measuring apparatus which has an open circuit, direct voltage of 500 volts.

The four (4) sizes of masks shall be designated as the following:

Workmanship. The oronasal mask shall be free from defects which detract from its appearance or impair its serviceability.

Unit. Each (EA). Each masks, as specified, constitutes one unit.

Quality Assurance Provisions.

Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contact or purchase order, the contractor may use his own or any facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements.

Records. Records of examinations and tests performed by or for the contractor shall be maintained by the contractor and made available to the Government upon the Government’s request, at any time, or from time to time, during the performance of the contract and for a period of three years after delivery of the supplies to which such records relate.

Inspection. Inspection, as used herein, is defined as both examination (such as visual or auditory investigation without the use of special laboratory appliances or procedures) and testing (determination by technical means of physical and chemical properties) of the item.