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| MIL-T-50777A(OS)
3.4 Marking for identification. Unless otherwise specified, tubing shall be marked in
accordance with FED-STD-184.
3.5 Workmanship. The tubing shall be seamless and uniform in quality. Exterior and interior
surfaces shall be clean and smooth. Seams, slivers, laps, laminations, grooves, or inclusions and
other defects specified in figures 1 through 12 shall not be permitted. Tube may be supplied with
a ground finish provided that the depth of grinding is sufficient to remove surface imperfections,
so, if later etched, the surface does not show imperfections equal to those shown on figures 1 to
12. If supplied with a ground finish, it shall be at least equal to RMS 100.
4. QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase
order, the contractor is responsible for the performance of all inspection requirements
(examinations and tests) as specified herein. Except as otherwise specified in the contract or
purchase order, the contractor may use his own or any other 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 this
specification where such inspections are deemed necessary to assure supplies and services conform
to prescribed requirements.
4.1.1 Responsibility for compliance. All items shall meet all requirements of sections 3 and
5. The inspection set forth in this specification shall become a part of the contractor's overall
inspection system or quality program. The absence of any inspection requirements in the
specification shall not relieve the contractor of the responsibility of ensuring that all products
or supplies submitted to the Government for acceptance comply with all requirements of the
contract. Sampling inspection, as part of manufacturing operations, is an acceptable practice
to ascertain conformance to requirements, however, this does not authorize submission of known
defective material, either indicated or actual, nor does it commit the Government to accept
defective material.
4.2 Quality conformance inspection. Quality conformance inspection shall consist of
sufficient spot checks to ensure conformance with the dimensional tolerances specified. If the
procuring activity approves, a system of statistical quality control may be used for dimensional
inspection. Each piece of tubing shall be examined to determine conformance to 3.5.
4.2.1 Inspection lot. An inspection lot shall consist of tubing of the same nominal outside
and inside diameter submitted for inspection at one time.
4.2.2 Sampling.
4.2.2.1 For chemical analysis.
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