The gages specified herein are intended for use in determining the acceptability of sockets up to and including the 1 in. non-dnal hexagon socket size and the 0.790 in. nominal spline socket size. Suitability of hexagon sockets of nominal sizes larger than 1 in. shall be determined by direct measurement for various technical and economic reasons. For dimensions of gages for sockets and spline sockets, see Tables I-1 and I-2.

I-2 GAGING OF HEXAGON SOCKETS

Hexagon sockets in screws shall allow the GO member of the gage to enter freely to the minimum key engagement depths specified in the dimensional tables for the respective screw types.
For hexagon sockets that are not chamfered, the NOT GO gage member shall not enter any of the three acrossflat dimensions of the socket for nominal socket sizes of 1/8 in. and larger, and the hexagonal NOT GO gage member shall not enter the socket for nominal socket sizes smaller than '/8 in.
For charnfered hexagon sockets, the NOT GO gage member shall be permitted to enter only to a depth equivalent to 10% of the nominal socket size for nominal socket sizes up to and including 1/16 in., and to 7.5% of the nominal socket sizes for larger sockets.

Spline sockets in screws shall allow the GO member of the gage to enter freely to the minimum key engagement depths specified in the dimensional tables for the respective screw types.
For spline sockets that are not chamfered, the NOT GO gage member shall not enter the socket.
For chamfered spline sockets, the NOT GO gage member shall be permitted to enter only to a depth equivalent to 10% of the nominal socket size for nominal socket sizes up to and including 0.060 in., and to 7.5% of the nominal socket size for larger sockets.

1-4 GAG ES

Gages shall be made from any grade of steel, through-hardened and tempered to 60 HRC minimum.
The form of hexagonal and spline gage members shall be within the tolerance zone specified. See ASME Y14.5M, Engineering Drawing and Related Documentation Practices, Dimensioning and Tolerancing.
The surface roughness on hexagon and spline flats shall be 8 uin. (arithmetical average) maximum. See ASME B46.1, Surface Texture.
The gage handles shall conform to ASME B47.1, Gage Blanks.