ASME B107.4M-1995, Driving and Spindle Ends for Portable Hand, Impact, Air and Electric Tools (percussion tools excluded)
ASME B107.17M-1997, Gages, Wrench Openings, Reference
Publisher: The American Society of Mechanical Engineers (ASME International), Three Park Avenue,
New York, NY 10016-5990; Order Department: 22
Law Drive, P0 Box 2300, Fairfield, NJ 07007-2300
ASTM E 18-97a, Standard Test Methods for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials
Publisher: American Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959
4.1 Illustrations
The illustrations shown herein are descriptive and not restrictive, and are not intended to preclude the manufacture of sockets and attachments that are otherwise in accordance with this Standard.
4.2 Materials
Unless otherwise specified, the material used in the tools shall be steel, the chemical composition and heat treatment of which shall be such as to produce tools conforming to the requirements hereinafter specified.
4.3 Dimensions
Dimensions shall be in accordance with applicable tables.
4.4 Markings
Sockets and attachments shall be marked in a plain and permanent manner with the manufacturer’s name or with a trademark of such known character that the source of manufacture and country of origin may be readily determined. In addition, sockets shall be marked in a plain and permanent manner with the nominal size of the wrench opening (distance across fats) for the nut, bolt, or screw end.
4.5 Proof Torque
When tested as specified, sockets and extensions shall withstand the proof torque specified in the applicable tables without failure or permanent deformation (set) that might affect the durability or serviceability
of the wrenches.
4.6 Hardness
Sockets and attachments shall be hardened and shall have a hardness value for the various sizes within the range shown in the table below except that the maximum hardness for Type I Class 4 and 5 shall be 52 HRC. Oxide Coating. The coating shall consist of a chemically produced oxide coating followed with a coating of a rust preventative.
4.9 Bolt Clearance Hole
A bolt clearance hole shall be provided in all sockets except Type II,, universal sockets detailed in para.
4.9.1. The minimum depth of the bolt clearance hole shall be 1.5 times the minimum depth of the nut opening as set forth in the respective tables for regular length sockets and not less than 55% of the overall length for long length and extra long length sockets as measured from the face of the wrench end. The size of the bolt clearance hole shall be in accordance
with that of the applicable size socket specified in the respective tables for each class and style.
4.9.1 A bolt clearance hole may be provided in Type II, Class 1 and 2, universal sockets. The diameter of the hole if provided shall be in accordance with the applicable size socket as specified in Tables 14 and 15.
4.10 Through Hole
A through hole having a minimum diameter equal to 50% of the square drive size or equal to the bolt clearance hole diameter, whichever is smaller, shall be provided.
4.11 Internal Drive Opening
All internal drive openings shall be well defined.
The openings shall conform to ASME B107 .4M. 4.12 Countersink of Nut End Socket Opening
If countersunk, the nut end socket opening shall be countersunk with an included angle of 85 deg to 155 deg and a minimum diameter equal to the across- corners dimension of the opening.
4.13 External Corners
External cormers shall be broken with no sharp edges.
4.14 Type Socket, Single Hexagon (6- Point) and Double Hexagon (12-Point)
Sockets shall conform to Tables 1 through 7, Table 9, and Table 10.