1、FORD WORLDWIDE FASTENER STANDARDDate: 1996-10-01Engineering Standards & 1 of 2 Printed copies are uncontrolled .Systems Engineering (ESSE)WE 900APPENDIX AGauging of Hexagon and Hexagon Flanged Prevailing Torque NutsA1. GENERAL.A1.1 HEXAGON.The nut shall be gauged using two plain ring gauges, A2 and
2、B, to demonstrate thecoincidental acceptability of hex height, wrenching height and width across corners.A1.2 HEXAGON FLANGED.The nut shall be gauged using three plain ring gauges, A1, B and C, to demonstrate thecoincidental acceptability of hex height, wrenching height, width across corners, and th
3、eflange diameter and thickness.A2. GAUGING.A2.1 HEX PORTION.For hexagon nut gauge A2 shall be seated on a flat surface and the nut placed on it. Forhexagon flanged nuts gauge A1 shall be placed over the hex portion and seat on theflange. Gauge B shall be placed on the top of the nut normal to the nu
4、t axis. The twogauges shall not be in contact.A2.2 FLANGE.Gauge C shall be seated on a flat surface and the nut placed in it. Gauge A1 shall beplaced over the hex portion. The nut shall seat within gauge C, and gauges A1 and Cshall not be in contact.NOTE: For hexagon nuts only Clause A2.1 applies. F
5、or hexagon flanged nuts both A2.1and A2.2 apply.FORD WORLDWIDE FASTENER STANDARDDate: 1996-10-01Engineering Standards & 2 of 2 Printed copies are uncontrolled .Systems Engineering (ESSE)WE 900APPENDIX AGauging of Hexagon and Hexagon Flanged Prevailing Torque NutsDimensions in mmNominal Size M5 M6 M8
6、 M10 M12 M14 M16 M20 M24Gauges A1 & A2 W a Max. 9.25 11.56 15.02 17.33 20.79 24.26 27.72 34.65 41.58Min. 9.24 11.55 15.01 17.32 20.78 24.25 27.71 34.64 41.57Gauge A1 T a Hexagon Max. 2.2 3.1 4.5 5.5 6.7 7.8 9 11.1 -Flanged Min. 2.19 3.09 4.49 5.49 6.69 7.79 8.99 11.09 -Gauge A2 T a Hexagon Max. 2.75
7、 3.3 4.4 5.5 6.6 7.7 8.8 11 13.2Min. 2.74 3.29 4.39 5.49 6.59 7.69 8.79 10.99 13.19W b Max. 8.78 11.04 14.37 16.63 20.02 23.35 26.74 32.94 39.54Gauge B Min. 8.77 11.03 14.36 16.62 20.01 23.34 26.73 32.93 39.53T b Min. 3 4 4 5 5 6 6 6 6W c Min. 12 14.4 18.1 22 26.2 30.01 34.7 43 -Gauge C T c Max. 1.08 1.19 1.31 1.81 2.2 2.55 2.96 3.7 -Min. 1.07 1.18 1.3 1.8 2.19 2.54 2.95 3.69 -
