A-A-53514
1 June 1988
COMMERCIAL ITEM DESCRIPTION
LID, ANAEROBIC CULTURE APPARATUS
The General Services Administration has authorized the use of this commercial item description.
This commercial item description covers a lid assembly which is a component of an anaerobic culture apparatus.
Salient characteristics.
The lid shall be the lid assembly of, or lid assembly replacement for, a self contained anaerobic apparatus suitable for use in conjunction with other components entering into the overall apparatus. (See notes)
The lid assembly shall consist of the following components:
A cover, fabricated of a suitable plastic material with an outside diameter equal to the outside diameter of the jar flange. The cover shall have an annular groove on the inner surface fitted with an “O” ring gasket to form a seal with the top surface of the jar flange. A central boss on the internal surface shall contain a female blind thread for mounting the catalyst reaction chamber, and a central boss on the outside surface shall have a depression for use in centering and securing the cover into position on the jar flange in conjunction with the clamp and thumb screw components.
A “C” clamp, fabricated of a suitable plastic material, which clears the outside diameter of the jar flange and has a central tapped hole into which the thumb screw shall fit.
A corrosion resistant metal thumb screw with knurled head, and thread diameter not less than 7/16 inch (1.1 cm). Length of thread and dimensions of the knurled head shall be such that the cover can be easily positioned and sealed on the jar flange or removed therefrom by hand without the need for tools.
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
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