A-A-2940 Yardstick (Wood And Aluminum)This Commercial Item Description covers yardsticks used for general purpose measuring.

Pages 1 - 2 - 3

[INCH-POUND]
A-A-2940A
March 5, 2002
SUPERCEDING
A-A-2940
December 15, 1995

COMMERCIAL ITEM DESCRIPTION

YARDSTICK (WOOD AND ALUMINUM)

The General Services Administration has authorized the use of this Commercial Item Description by all federal agencies.

1. SCOPE. This Commercial Item Description covers yardsticks used for general purpose measuring

2. CLASSIFICATION. The yardsticks shall conform to the following types.

2.1 Type 1. Wood

2.2 Type 2. Aluminum.

3. SALIENT CHARACTERISTICS.

3.1 Type 1. Yardstick shall be made of one piece, select, well seasoned hardwood. The yardstick shall be 36 inches (+/- 1/32) inch in length, a minimum of 3/16 inch thick, and 1 inch (+/- 1/32 inch) in width. Graduation lines shall be uniform in width and depth and filled with a durable black material. Figures shall be clear, permanent, free from ragged edges and breaks, and shall appear in a distinctive manner to be legible under all service conditions. One side shall be graduated in l/8-inch increments and numbered consecutively for every inch. The opposite side shall be graduated and numbered at 1/16, 1/8, 1/4, 3/8, 1/2, 5/8, 3/4, and 7/8 fractions of a yard and read from left to right. The out of parallel error between edges shall not exceed 1/64 inch in 36 inches. The end shall be within 1/2 degree of being square and have flush-rigidly mounted, corrosion resistant metal, end caps on each end, not extending more than 1/4 inch on to both faces. The yardstick shall be protected with a clear durable coating and may have a hole in the end for hanging purposes.

3.2 Type 2. Yardstick shall be made of one-piece, tempered aluminum with a matt finish. The yardstick shall be 36 inches (+/- 1/32) inch in length, a minimum of 1/16 inch thick, and 1 inch (+/- 1/32 inch) in width. The yardstick shall have graduations on one side only and both edges shall be in 1/16-inch increments and numbered consecutively in inches. Graduation lines shall be straight, of uniform width, and of equal height. Figures shall be clear, permanent, free from ragged edges and breaks, and shall appear in a distinctive manner to be legible under all service conditions. The error between any two graduations shall not exceed 1/64 of an inch. The out of parallel error between edges shall not exceed 1/64 inch in 36 inches and the end shall be within 15 minutes of being square. Graduations shall be black and durable. The yardstick shall be either anodized or protected with a clear durable coating and may have a hole in the end for hanging purposes.