ASME B18.16.3M:1998 pdf download DINENSIONAL REOUIREMENTS FOR PREVAILING TOROUE TYPE STEEL MERIC HEX NUTS AND HEXFLANGENUTS
1 INTRODUCTORY NOTES
1.1 Scope
1.1.1 This Standard covers the complete gencral and dimensional data for metric prevailing-torque hex nuts asshown in Table l and hcx flange nuts as shown in Table 2
1.12 The inclusion of dimensional data in thisStandard is not intended to imply that all of the nut sizesin conjunction with the various options described hereinare stock items. Purchasers are requested to consult withmanufacturers concerning lists of stock production prevailing-torque hex and hex flange nuts.
1.2 Nut Designs and Property Classes
1.2.1 There are three basic designs for prevailingtorque nuts:
(a) all-metal, one-piece construction nuts which derive their prevailing-torque characteristics from controlled distortion of the nut thread and/or body:
(b) metal nuts which derive their prevailing-torquecharacteristics from the addition or fusion of a nonmetallic insert, plug, or patch in their threads;
(c) top insert two-piece construction nuts which derive their prevailing-torque characteristics from an insertusually a full ring of nonmetailic material located andretained in the nut at its top surface.
1.2.2 The two nut designs defined in (a) and (b) ofpara. 1.2.1 have the sarne dimensional requiremments andare designated “all-metal typein Tables 1 and 2. Nutdesign (c) of para.1.2.1 is designated “top insert typein Tables 1 and 2.
1.2.3 Property classes 5, 9, and 10 nuts have me-chanical and performance propertiesas specified inASME B18.16.1M Mechanical and PerformanceRequiremnents for Prevailing-Torque Type Steel MetricHex Nuts and Hex Flange Nuts.
1.3 Comparison With ISO Standards
1.3.1 Hex and hex flange nuts as covered in thisStandard have been coordinated to the extent possiblewith draft ISO proposed standards. The dimensional differences betwecn this Standard and the draft ISO are fewNone should affect the dimensional interchangeability ofnuts manufactured to the requiremments of either.
1.3.2 I etter symhols designating dimensional characteristics arc in accord with those used in ISO standards, exceptthat capitals have been used for data processing convenienceinstcad of the lowercase letters used in ISO standards.
1.3.3 M10 hex and hex flange nuts with 15 mm widthacross flats are currently bcing produced and used in theUSA. and many other countries of the world. This widthacross flats is not ISO standard for hex nuts, but is ISOstandard for hex flange nuts. The ISO standard for M10hex nuts specifies 16 mm width across flats. Unless M10hex nuts with 15 mm width across flats are specificallyordered, Ml0 hex nuts with 16 mm width across flatsshall be furnished.
1.4 References
Unless otherwise specified, the referenced standardshall be the most recent available at the time of orderplacement.ANSI and ISO standards may be obtained from ANSIAmerican National Standards Institute,11 West 42ndStreet New York,NY 10036-8002
ASME BlB18or Y14 series standards may be obtained from the ASME Order Department, Box 2300.Fairfield,NJ 07007-2300.
1.5 Dimensions
All dimensions in this Standard are in millimeters, unless otherwise stated. All dimensions apply to the respective characteristic before plating or coating.
ASME B18.16.3M:1998 pdf download
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