A-A-320 Chalk, Marking, White (Molded)

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A-A-320A

*- Breaking Strength Test. Place one piece of chalk across two horizontal parallel rods 1/4 inch diameter and 2-1/2 inches apart, center to center. Using a 1/4 inch diameter rod, the test load shall be applied in a vertical direction at the midpoint of the chalk. Gradually apply and increase test load up to 2 pounds and maintain maximum load for 30 seconds. The chalk shall be of sufficient hardness to withstand the breaking strength test without breaking.

3.            Quality Assurance

Each lot of chalk shall be inspected for conformance to the requirements herein. Sampling for inspection shall be in accordance with MIL-STD-105 using the plans specified below.

A.            Sampling for visual examination- Inspection level S-3 with an Acceptable Quality Level (AQL) of 4.0 percent defective. The sample unit shall be one piece of chalk.

B.            Sampling for dimensional examination- Inspection Level S-3 with Acceptable Quality Level (AQL) of 4.0 percent defective. The sample unit shall be one piece of chalk.

C.            Sampling for end item testing- Inspection Level S-2 with an Acceptable Quality Level (AQL) of 2.5 percent defective. The sample unit shall be one piece of chalk.

D.            Packaging, Packing, and Marking- Inspection Level S-2 with an AQL of 4.0 percent defective. The sample unit shall be one fully prepared shipping container.

4.            Preparation for delivery.

Packaging, packing and marking shall be as specified in the contract or purchase order.

5.            Application for copies of technical documents referenced herein.

The issue date in effect on the date of invitation for bids or request for proposal shall be apply.

MIL-STD-105 is available from Standardization Documents Order Desk; Building 4D; 700 Robbins Avenue; Philadelphia, PA 19111-5094.

ASTM standard test methods can be obtained from the American Society for Testing and Materials; 1916 Race Street; Philadelphia, PA 19103.

Public Law 94-580, Resource Conservation and Recovery Act, is part of U.S. Code, Title 42. Available from the Congressional Sales Office, U.S Government Printing Office, Washington, D.C 20402.