A-A-51587A
15 February 1988
SUPERSEDING
A-A-0051587(DM)
4 August 1986
COMMERCIAL ITEM DESCRIPTION
CHISEL, DENTAL, (Rhodes No. 36 and 37)
The General Services Administration has authorized the use of this Commercial Item Description.
This commercial item description covers a double-ended back action periodontal chisel of Rhodes design.
Salient characteristics:
The chisel shall be in accordance with the applicable requirements of Federal Specification GG-I-526 with additional requirements specified herein.
Material. The operative ends shall be class 4, Type 440A, 440B, or 440C stainless steel. Handles shall be chromium plated brass. Brass shall conform to copper alloy No. 260 or 330 as specified in ASTM B135 for chemical composition only.
Hardness. After proper stress relieving, the Rockwell hardness of the operative ends shall be C52 to C56 for type 440A, C54 to C58 for type 440B, and C56 to C60 for type 440C when tested in accordance with ASTM E-18 (Rockwell) or E-92 (Vickers or Diamond pyramid). Conversion of Vickers Hardness to Rockwell Hardness values shall be in accordance with ASTM E-140.
Style, design and dimensions. The chisel shall be a double-ended back action periodontal chisel No.36 and 37 of Rhodes design. The chisel shall be suitable for use in periodontal therapeutic procedures. The chisel shall permit access to deep regions of the oral cavity. The chisel shall be of three piece construction. Handle shall be hollow so as to provide lightness and thereby facilitate tactile sensibility. The operative ends shall be permanently secured to the handle. The interface between the operative ends and the handle shall be smoothly blended with no crevices evident. There shall be no movement, loosening, or separation between the operative ends and the handle shall be smoothly blended with no crevices evident. There shall be no movement, loosening, or separation between the operative end and the handle when the operative end is subjected to an 85 pound (minimum) pull out force, when tested as specified herein.
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
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