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MS 15429

1953 Edition, March 26, 1953

Complete Document

LIFE PRESERVERS, VEST, FIBROUS GLASS INSPECTION STANDARD



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Description / Abstract:

                             INSPECTION STANDARD

                     LIFE PRESERVES, VEST, FIBROUS GLASS




Visual and Dimensional Inspection (classification of defects as per Standard MIL-STD-105)
   Critical Defects:

    1   Pads not filled with fibrous glass material as specified.
    2   Pads not properly located in jacket; not tufted as specified.
    3   Pads missing.
    4   Incomplete jacket.

   Major Defects: (sampling as per specification) AQL = 1.5 percent defective.

    101   Type or size jacket not as specified.
    102   Jacket outside and inside not made from cotton drill as specified.
    103   Webbing for body straps and leg straps not one inch cotton webbing as specified.
    104   Collar not made from nylon.
    105   Stitching of cotton drill cover, nylon collar, webbing and tapes incorrect; not
            correct type stitch.
    106   Cotton thread for stitching not as specified.
    107   Webbing and tape attachment to drill not as specified.
    108   Seaming of the print cloth pad covers (for fibrous glass) not as required.
    109   Leg straps and body straps not stitched to the jacket as specified.
    110   Lacing material not as specified; incorrect length.
    111   Metal hardware (for eyelets, strap tips, "Dee" rings, adjustable tension slides,
           and snap hooks) not stainless steel or brass.
    112   Metal hardware not properly attached or missing.
    113   Print cloth (for pads) not as specified.
    114   Completed pads not properly sealed or enclosed in the required vinyl film envelope.
    115   Vinyl film envelope material not as specified; film thickness not within the specified
           tolerance.
    116   Marking tag not bleached print cloth as specified; tag not sewed in correct location;
           missing; printing on the tag not waterproof black ink; not legible; not correct
           marking.
    117   Jacket color not as specified, drill not vat dyed to match the specified color clip or
           card.

   Minor Defects: (AQL = 4.0 percent defective).

    201   Jacket tie tapes and tunnel tapes not the specified width.
    202   Tie loops and collar tie tapes not the specified width.
    203   Laces not properly tied.
    204   Webbing ends frayed, not turned under.
    205   Hardware finish not as specified.
    206   Completed jacket not clean, dirty or oil spots.
    207   Tufting twine material not as specified.

Inspection testing (sampling as per specification).

    Breaking strength test:
      Body strap assembly falls break test during the testing machine method or the alternate
       dead weight method.
    Pad immersion test:
      Completed front and back pads, including the sealed waterproofed envelopes, when
       tested as specified show leakage of air bubbles.
    Pad seam test; (Vinyl film envelope).
      One inch strips cut as specified and pulled apart at a rate of separation of 12 inches
       per minute, fails test, adhesion less than 8 pounds.
    Distribution of buoyant medium test:
      Fiber glass material for collar pad, back pad, upper front and lower front pads not
        distributed as specified weight nonconforming.
    Buoyancy test:
      Completed front and back pads including the sealed waterproof envelopes failed when
       tested as specified.
    Production, check test: (at a Government laboratory).
      Test specimen forwarded and tested as specified, see laboratory report for results,
       test specimen acceptable or re-test required.




Referenced specifications and standards of the issue in effect on date of invitation for bids shall apply.
Note: This standard is for the guidance of Government inspectors to assure uniformity of
      acceptance inspection. It does not alter the specification or the terms of the contract.
      The Government reserves the right to determine at its sole discretion, as they arise,
      any defects not included herein.


NOTICE: When Government drawings, specifications, or other data are used for any purpose other than in connection with a definitely related Government procurement operation, the United States Government thereby incurs no responsibility, nor any obligation whatsoever; and the fact that the Government may have formulated, furnished or in any way supplied the said drawings, specifications, or other data is not to be regarded by implication or otherwise as in any manner licensing the holder or any other person or corporation, or conveying any rights or permission to manufacture, use, or sell any patented invention that may in any way be related thereto.