ASME B107.17:1997 pdf download EAGES, WRENCH OPENINGS, REFERENCE
1 SCOPE
This Standard establishes final inspection gage sizes forwrench openings, and spark plug wrench openings for inchand metric sizes. This Standard does not cover every available size, but only those most commonly manufactured
2 APPLICATION
The gages covered by this Standard shall be used toensure the manufacture of conforming product in inchand metric sizes.
3 NORMATIVE REFERENCES
The following documents form a part of this Standardto the extent specified herein.
ASTM E 18-94，Standard Test Methods for RockwellHardness and Rockwell Superficial Hardness ofMctallic Materials
Publisher: American Society for Testing and Materials.100 Barr Harbor Drive, West Conshohocken,PA 19428ISO 691-1983 (E)，Wrench and Socket Openings–Metric Series-Tolerances for General UseISO 11168:1995 (E),Socket Wrenches for Spark- andGlow-PlugsPublisher: International Organization for Standardization1 rue de Varembe, Case postale 56, CH-1121 Geneve20，Switzerland/Suisse
4 REQUIREMENTS
4.1 Illustrations
The gages shall be similar to those shown in Fig. 1 forhex gages and Fig. 2 for square gages.
4.2 Material
The gages shall be made of steel, suitable for the pur-pose intended and hardened to 60 HRC minimum. Thehardness shall be tested using procedures outlined inASTM E 18.
4.3 Gage Use And Design
The gages shall be of the sizes and tolerances given inTables 1A, 2A, and 3A. Formulas are provided for sizesnot listed.
The gages shall be used in accordance with acceptedpractices. Manufacturers may use gages with tighter di-mensions than those shown herein.
The size for all limits (“Goand “No Go) gages shallnot exceed the extreme limits specified herein. All vari-ations (manufacturing tolerance, calibration error, wearallowance, etc.) in the gages, whatever their cause or purpose, shall bring these gages within the extreme limits ofthis gage size specified within this Standard. Thus a gagewhich represents a minimum limit may be larger, butnever smaller,than the minimum size specified; likewisethe gage which represents a maximum limit may besmaller, but never larger, than the maximum size specified.
4.3.1 Rounding Method. To be used for deter-mining dimensions for gages. When the next digit beyond the last digit to be retained is:(a) less than 5, the last digit to be retained is notchanged;(b) 5 or more, the last digit to be retained is increasedby one.