A-A-53912
13 June 1990
COMMERCIAL ITEM DESCRIPTION
TRIMMERS, GINGIVAL MARGIN, DENTAL
(Corrosion-Resisting Steel)
The General Services Administration has authorized the use of this Interim Commercial Item Description as a replacement for Federal Specification GG-T-1368B, which is cancelled.
Salient characteristics.
This commercial item description covers corrosion-resisting steel dental gingival margin trimmers for use in cavity preparation during dental operative procedures.
Classification. Trimmers covered by this item description shall be of the following styles and numbers as specified in “Identification marking” and “Note” section.
Style 1 – No. 26
Style 2 – No. 27
Style 3 – No. 28
Style 4 – No. 29
Requirements. The trimmers shall be in accordance with the applicable requirements as specified herein.
Material. The trimmers shall be fabricated of Class 4, type 440A martensitic stainless steel, as specified in ASTM F 899 for composition only.
Hardness. The operative end shall have a Rockwell hardness of C52 to C56 after proper stress relieving. The handles and shanks shall be properly tempered and shall have a hardness suitable for the purpose intended. Hardness shall be determined as specified herein.
Style, design and dimensions. The trimmers shall be double-ended and one-piece construction. The trimmers shall be of Dr. Black’s design modified by Dr. Ferrier. The style, design and dimensions shall be in accordance with Defense Personnel Support Center (DPSC) Drawing 24182. The trimmers shall conform to Black’s formula as specified in the drawing and as specified in Table I, for the applicable instrument number. The trimmers shall be suitable for planing enamel and cutting dentin in cavity preparation during dental operative procedures.
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
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