ASME B18.2.2:2015 pdf free download

ASME B18.2.2:2015 pdf free download.Nuts for General Applications: MachineScrew Nuts, Hex, Square, Hex Flange,and Coupling Nuts.
3.2 Corner FlU
A rounding or bck of fill at junction of hex corners with chamfer shall be permissible, provided the width across corners Is within specified limits at and beyond a distance equal to 173% of the basic thread diameter from the chamfered lace.
3.3 lops of Nuts and Chamfers
Tops of nuts shall be flat and chamfered. Unless otherwise specified by the purchaser or in this Standard, nuts in sizes In. nominal size and smaller shall be double- chamfered. Larger size nuts shall be double-chamfered or have washer-faced bearing surface and hamlered
3.3.1 SingleChamfered Nuts and Washer-Faced Nuts. Diameter of the chamfer circle shall be equal to the maximum width acnr6s flats within a tolerance of
—15%. The length of chamfer at hex corners shall be from 5% to 15% of the basic thread diameter. The surface of the chamfer may be slightly convex or rounded
3.3.2 Double-Chamfered Nuts. Diameter of the chamfer circle shall be equal to the maximum width across flats with a -10% tolerance.
3.4 Countersink
Unless otherwise specified in this Standard, tapped holcs shall be countersunk on the bearing laces, The maximum countersink diameter shall be the thread basic (nominal) major diameter plus 0.030 in. for in. nominal size nuts and smaller, and I .0 times the basic major diameter for nuts larger than 34 in. No part of the threaded portion shall project beond the bearing surface.
3.5 Nut Thickness
The nut thickness shall be the overall distance, measured parallel to the axis of nut. Irons the top of the nut to the bearing surface and shall include the thickness of the washer face where provided
3.6 Washer Face Diameter
Unless otherwise specifled. the outside diameter of washer face shall be equal to the maximum width across flats with a -10% tok-rance.
3.7 Slots
When specified in the respective dimensional table, slots shall be normal to nut flats. Contour of bottom of slots shall be at manufacturers option. Requirements for gaging slots are specified in Mandatory Appendix I.
3.8 True Position of Tapped Hole
3.81 Hex Nuts. The axis of tapped hole in hex nuts shall be l&x.ated at true position with respect to the axis of nut body within a tolerance zone having a diameterequivalent to 4%of the maximum widthacross flatsfor 1/ in. nominal size nuts or smaller and 6%of themaximum width across flats for nuts larger than 1% in.,regardless of feature size.
3.8.2 Square Nuts.The axis of tapped hole in squarenuts shall be located at true position with respect tothe axis of nut body within a tolerance zone having adiameter equivalent to 10% of the maximum widthacross flats,regardless of feature size.
3.9 Bearing Surface Perpendicularity
Bearing surface shall be flat and perpendicular to theaxis of the threaded hole within the specified full indica-tor measurement (FIMJ limit indicated in the tables. SeeNonmandatory Appendix C for measurementprocedure.
3.10Threads
3.10.1 Thread Standard. Threads shall meet therequirements of ASME B1.1.