A-A-52300
the protractor but shall be in reading position when the graduated surface is placed in contact with the drawing, map, or other work being performed.
Horizontal axis. On plastic protractors, the horizontal axis may be along either edge of the crossbar or within the area between the edges of the crossbar. When the horizontal axis is formed by either edge of the crossbar, a bevel not less than 0.500-inch long shall be formed on the top surface of the crossbar along the horizontal axis, centered with the line indicating the vertical axis of the protractor. The lower edge of the bevel shall be not less than 0.015-inch nor more than 0.031-inch from the bottom surface of the protractor at the point of intersection of the vertical and horizontal axis. When the horizontal axis falls within the area between the edges of the crossbar, each axis shall be represented with a line formed by the same method as that used for the graduations, and at the point of intersection of the horizontal and vertical axis a 0.0625-inch diameter hole shall be drilled, countersunk or formed. The outer edge of the protractor shall be beveled on the top surface of the graduated edge.
Workmanship. The surface and edges of finished protractors shall be true, smooth, uniform, and polished and shall be free from defects which affect the appearance or which might impair the serviceability or use of the protractor.
Certification of commercial item. The contractor shall certify that the product offered meets the salient characteristics of this description and conforms to the producers’ own drawings, specifications, standards, and quality assurance practices and is the same product offered by the contractor in the commercial marketplace for at least one year preceding the solicitation. The Government reserves the right to require proof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisions of the contract.
Metric products. Products manufactured to metric dimensions will be considered on an equal basis with those manufactured using inch-pound units, providing they fall within the tolerance specified using conversion tables contained in the latest revision of Federal Standard 376, and all other requirements of this document are met.
If a product is manufactured to metric dimensions and those dimensions exceed the tolerances specified in the inch/pound units, a request should be made to the contracting officer to determine if the product is acceptable.
The contracting officer has the option of accepting or rejecting the product.
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