ASME B18.2.3.9M:2001 pdf free download

ASME B18.2.3.9M:2001 pdf free download.METRlC HEAVYHEX FLANGESCREWS.
(a) ASME B18.2.3.9M covers the complete dimensional and general data for metric series heavy hex Ilange screws recognite as American National Standard,
(b) The inclusion of dimensional data in this Standard is not intended to imply that all products described arc stock production items. Consumers should consult with suppliers concerning availability of products.
2 COMPARISON WITH ISO/DIS e102
(a) Heavy hex flange screws as presented in this standard are harmoniTcd to the extent possible with the draft intcrnationai standard lSOfDlS 8102. Hexagon Bolts With Flange—Heavy Scrics, and with revisions agreed to by ISOITC2/W02 in May I99 in Zurich and later that have not been published in a revised sfraft. If it were published, the dimensional differences between this Standard and lSO)’[)lS 8102 would be few, relatively minor, and none would affect functional interchangeabiliiy of screws manufactured to the requirements of either.
This Standard specities some requirements that are not included in ISO/DIS 8102. I)imrnslonal requirements shossn In bold pe are In addition to. or differ frns. ISO/HIS 8102. The technical differences between this standard and the ISO documents are described in Appendix A.
(Er) Letter symbols designating dimensional characteristics are in accord with ISO 225. Fasteners—Bolts, Screws. Studs and Nuts—Symbols and Designations of Dimensions, and with ISO/HIS 8l02. except where capitals have been used instcad of loweirase lcttcrs used in the ISO standards
3 REFERENCED STANDARDS
The following is a list of puNications referenced in this Standard. Unless otherwise specified, the standarilts) referenced shall be the most recent issue at the time of order placement.
This Appendix describe,, the technical differences between ASME I318.2.3.9M-200l and ISO/1)IS 8102. with unpublished changes agreed upon in lSOfl’C2/ WG2. May 1989 and later, and related ISO standards.
Al PRODUCT NAMES BOLT AND SCREW
Of the products named hex flange screw per Bl8.2.3.9M. those that are threaded full length would be named hexagon screw with flange per ISO 1891. but those that arc not threaded full length are named hexagon boli with flange per ISO 1891 and ISO/ DIS 8102.
A2 MAXIMUM WIDTH ACROSS CORNERS
B18.2.3.9M Table I maximum width across corners is not specified in ISO 8102. Instead. ISO/DIS 4759- 1: May 1998 would control the shape of the hexagon by zero positional tolerance at maximum material condition. which is not specified in B1X.2.3.9M.
A3 GAGING OF HEX FLANGE HEAD
ISOII)IS 8102 would specify a gage C for gaging flange thickness, which is not included in B18.2.3.9M.
A4 POSON OF HEAD
BI8.2.3.9M para. 11 and Table 2 specify positional tolerance at maximum material condition, as in ISO/ DIS 4759- I: May 1998, instead of regardless of feature size, as in ISO 475911-1978. ISOIDIS 4759-I: May 1998 also specifies position of the llange diameter with respect to the shank, which is not specified in
B! 8.2.3.9M.
A5 BEARING SURFACE
B18.2.3.9M Table 2 ulues for circular runout of the bearing circle are greater than those in ISO.