GSA A-A-2318-1985 FILE HAND (AMERICAN PATTERN) KNIFE《刀锉(美式)》.pdf
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1、A-A-2318 51 777977V 0042678 1 W A-A-231 8 September 27, 1985 ?COMMERCIAL ITEtd DESCRIPTION FILE, HAND (AMERICAN PATTERN), ROUND, REGULAR The General Services Administration has authorized the use of this commercial item description in preference to Type XVI, Class 1, Styles A, B, and C of Federal Sp
2、ecification GGG-F-325. This commercial item description covers hand files used for enlarging circular openings, elongating holes, and similar purposes. . Salient characteristics: Mater i al : Taper : Des i gn : Tang: Teeth: Marki ng : Workmanship : Carbon alloy steel. At least one-third of the lengt
3、h to the point. Furnished in bastard-cnt, second-cut, or smooth-cut as shown in table. Bastard-cut files in lengths 4 inches through 10 inches shall be single-cut (one set of parallel cuts on the surface) or double-cut (two sets of parallel cuts on the surface, one set crossing the other); lengths 1
4、2 inches through 16 inches shall be double-cut. Second-cut files shall be single-cut, except for the 14 inch length which shall be double-cut. Smooth-cut files shall be single-cut. wood handle. Tempered to a maximum hardness of 45 on the Rock- well C scale at a point approximately miavay of its leng
5、th and width. Of a conventional shape and size suitable ?or attachment to a Uniformly cut or etched and of uniform height throughout the fully cut portion. Cutting surfaces hardened to a uniform hardness. The distance between the heel and point of the file, excluding the tang, shall be hardened to n
6、ot greater than 68 nor less than 64 on the Rockwell G scale, Free from decarburization and britteness. a Marked with the country of origin and the name of the manufactur- er or with a trademark of euch known charaeter that the source of manufacture may be readily determined. The teeth of the file sh
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- GSAAA23181985FILEHANDAMERICANPATTERNKNIFE 美式 PDF

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