This Standard specifies the dimensional and marking requirements for precision hexagon bolts and screws with ISO metric coarse pitch series threads in diameters from 1.6 mm to 36 mm inclusive, and the material requirements for steel bolts and screws of property classes 4.6, 5.8, 8.8, 9.8, 10.9, 10.9 and 12.9.NOTES:The range of nominal sizes included in this Standard is considered adequate for most of the applications for which this series is likely to be employed, but for the convenience of users requiring larger sizes, further information in relation to the derivation of tolerances and head dimensions is provided in Appendix A and Appendix B respectively. Nuts for use with bolts to this Standard are specified in AS 1112. For information on recommended property classes of nuts to be associated with each property class of precision hexagon bolts and screws, see Appendix C.Inclusion of the property class given in this Standard does not necessarily imply that such types are stock items. The purchaser should refer to the manufacturer's listings for stock availability.If bolts with other than coarse pitch series threads are required, these are subject to agreement between the manufacturer and the purchaser, and the thread series should be selected from AS 1721.The purchaser, when ordering, or enquiring about, bolts or screws complying with this Standard should provide the supplier with all relevant details. The complete designation required is given in Clause 9.