A-A-2666A
4.2.3 For those characteristics for which there are no such controls. Or for end item performance test, lot by lot sampling for inspection shall be required. The sample unit shall be one pencil. Sampling shall be in accordance with the American National Standards Institute (ANSI)/American Society for Quality Control (ASQC) Z1.4. Sampling Procedures and Tables for Inspection by Attributes.
2.4.4 An inspection lot shall consist of all like items submitted for inspection at one time. The inspection level for visual, and dimensional shall be S-1 with an AQL of 4.0 percent defective. The inspection level for performance testing shall be S-4 with a AQL of 4.0 percent defective. The supplier must provide objective evidence (tests and inspection records) that the presented material meets the requirements of the sampling plan as indicated above.
5. Performance Testing: Unless otherwise specified, the test shall be conducted in an atmosphere of 230C + 1.10 C (73.50 F + 20 F). Test paper shall be in accordance with A-A-2804A, type III white bond paper having a pH average of not less than 5.0 with a basis weight of 75 grams per square meter (20 pound, 17 x 22 – 500). Alternately, paper conforming to JCP-O-60 can be used as an alternate source.
5.1 Lead Point Breaking Strength. The point break of the electrographic lead shall be determined by sharpening the point having diameters between.12 cm and 13 cm (.049 and .050 + .001 inch). After being pointed to the required diameter the pencil shall be placed in a rigid holder set to maintain a constant angle of 450 between the pencil and the flatform. The pencil shall extend beyond the underside of the block 3.2 cm to 3.8 cm (1 1/4 to 1 1/2 inches). measured along the pencil to the sharpened point. The scale platform shall be smooth and offer practically no resistance to the point moving across its surface. Pressure shall be applied by pushing the rod down gradually and uniformly in order to avoid variations and shock. If a lead crumbles, it shall be caused for rejection. Splintering or shipping of leads at offset of tests shall be cause for rejection. Reading shall be taken at the instant of breaking provided the point break is definite and does not develop into general crumbling. Not less than four pencils shall be used and each pencil shall be subjected to not less than four tests. The point strength of the leads shall be the average of all determinants.
6. Packaging:
6.1 Preservation, packing, and marking shall be specified in the contract or order.
7. Notes:
7.1 Source of documents. Issues of the following documents in effect on the date of invitation for bids or request for proposal form a part of this document to the extent specified herein.
7.1.1 Federal Acquisition Regulation (FAR) may be obtained from the Superintendent of Documents. Government Printing Office, Washington, DC 20402.
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