ASME B107.100 pdf download Flat Wrenches
4 PERFORMANCE REQUIREMENTS The illustrations shown herein are descriptive and not restrictive, and are not intended to preclude the manufacture of wrenches that are otherwise in accor- dance with this Standard. Inch table values are in inches unless otherwise specified. Metric table values are in millimeters unless otherwise specified. Wrenches shall pass applicable tests in section 5. Conformance with marking and other requirements not determined by test shall be verified by visual examination.
4.1 Design Wrenches shall provide a well proportioned comfort- able handgrip and be similar to the figure to which reference is made. The engaging surfaces of the wrench openings shall be finished in a smooth and well-defined manner. Wrenches that have a box end design shall be chamfered on at least one side to provide a lead for the working surfaces. The tips of all open ends shall have no burrs.
4.1.1 Wrench Openings. Wrench openings shall be such as to ensure acceptance when gaged with gages conforming to ASME B107.17M, and shall conform to one of the following wrenching opening designs:
(a) Standard Single or Double Hexagon Configuration. This design consists of a simple geometric single (6-point) hexagon or a double (12-point) hexagon config- uration having an across-flats and an across-corner shape for fitting with hexagon fasteners.
b) Modified Single or Double Hexagon Configuration. This design consists of a geometric single (6-point) hexa- gon or a double (12-point) hexagon configuration that does not contact on the fasteners corners.
(c) Open End Configuration. This design consists of a simple geometric configuration having an across-flats shape suitable for use on hexagonal and square-headed bolts and nuts.
4.1.2 B107.6 Combination Wrenches. B107.6 combi- nation wrenches shall have one open end and one 15 deg offset box opening (see Fig. 1).
4.1.3 B107.9 Box Wrenches. B107.9 box wrenches shall have two box ends.
4.1.4 B107.39 Open End Wrenches. B107.39 open end wrenches shall have two open ends.
4.1.5 B107.40 Flare Nut Wrenches. B107.40 flare nut wrenches shall have two 6- or 12-point slotted box wrench ends of different sizes (Type I) or one open end and one with a 6- or 12-point slotted box opening of identical nominal size (Type II) for use with hexagonal flare nuts.
4.2 Materials The materials used in the manufacturing of wrenches shall be such as to produce wrenches conforming to this Standard.
4.3 Markings Each wrench shall be marked on one of the faces or on the handle, as close to each head as is practical, in a legible and permanent manner with the respective nominal wrench opening as shown in the first column of the applicable table. In addition to size markings, each wrench shall be marked in a legible and permanent manner with manufacturer’s name or trademark of such known character that the manufacturer may be readily determined. Marking shall be as permanent as the normal life expectancy of the wrench to which it is applied (provid- ing the marked surface has not been subjected to a fret ting or abrading action) and be capable of withstanding the cleaning procedures normally experienced during its intended use. The marked area of the wrench may be exempt from the corrosion test in para.
5.3.4 when mutually agreed upon by the manufacturer and customer. 4.4 Hardness Wrenches shall be heat treated to 38 HRC to 55 HRC when tested as specified in para.
5.1. 4.5 Proof Torque When tested as specified, wrenches shall withstand the proof torque specified in the applicable tables with- out failure or permanent deformation (set) that might affect the durability or serviceability of the wrenches. See Tables 1 and 1M.