1、WORLDWIDE FASTENER STANDARDWA 900 Date: 2017 12 01Copyright 2016, Ford Global Technologies, LLC Page 1 of 12DIMENSIONAL REQUIREMENTS OF HEXAGON BOLTS, FLANGED HEXAGON BOLTSAND HEXAGON BOLT&WASHER ASSEMBLIES1. SCOPEThis standard gives dimensional requirements for hexagon bolts, flanged hexagon bolts
2、and bolt & washer assemblies with ISO metric thread diameters M4 to M24 inclusive for hexagon bolts and M5 to M16 inclusive for flanged hexagon bolts.2. REFERENCESISO 261 General purpose metric screw threads - General plan.ISO 965 General purpose metric screw threads - Tolerances.ISO 1502 General pu
3、rpose metric screw threads - Gauging.ISO 4014 Product grade A for the head of hexagon headed products.ISO 4017 Product grade A for the fully threaded shank portion of hexagon and hexagon flange headed bolts.ISO 4753 Fasteners - Ends of parts with external Metric ISO thread.ISO 6157-3 Fasteners Surfa
4、ce discontinuities.ISO 15071 Hexagon bolts with flange Small series Product grade A.WA 950 Material Requirements & Mechanical Properties of Bolts, Studs, and Bolt & Washer Assemblies.WA 990 Surface Discontinuities of Bolts and Screws.WF 900 Dimensional, Material, Heat Treatment, Hardness and Perform
5、ance Requirements for Flat, Toothed, Conical, Bowed and Wavy Washers for general use and for use in Screw or Nut and Washer Assemblies.3. GENERAL REQUIREMENTS3.1 DIMENSIONS AND TOLERANCESThe basic dimensions are shown in the individual product standards or Utility Part drawings. Unspecified dimensio
6、ns and tolerances shall be in accordance with:ISO 15071 for hexagon flange headed bolts.ISO 15071 for the shank portion of hexagon headed bolts.ISO 4017 Product grade A for the fully threaded shank portion of hexagon and hexagon flange headed bolts.ISO 4014 Product grade A for the head of hexagon he
7、aded products.3.2 GAUGING REQUIREMENTSThe gauging requirements shall be in accordance with the following standards:ISO 15071 for hexagon flange headed bolts.ISO 15071 for the shank portion of hexagon headed bolts.ISO 4017 Product grade A for the fully threaded shank portion of hexagon and hexagon fl
8、ange headed bolts.ISO 4014 Product grade A for the head of hexagon headed products.3.3 PROTECTIVE FINISHAll dimensions and tolerances defined in this specification apply prior to the application of the protective finish except where otherwise specified.Note: For dimensions and tolerances of plated b
9、olt threads see Clause 8.4. LENGTH4.1 BOLT & WASHER ASSEMBLIESBolt & washer assemblies must be threaded to permit a ring gauge to be screwed to within a distance from the bearing face of the head not exceeding the free height of the assembled washer plus 2.5 x the thread pitch for lengths up to and
10、including 2.5 x nominal size of the bolt thread, and 3 x the thread pitch for lengths greater than 2.5 x nominal size of the bolt thread.WORLDWIDE FASTENER STANDARDWA 900 Date: 2017 12 01Copyright 2016, Ford Global Technologies, LLC Page 2 of 125. DIAMETER OF SHANK (unthreaded portion).5.1 BOLTSRedu
11、ced shank is the only shank design permitted unless otherwise specified on a Utility drawing (no full shank constructions, see Foreword February 2003).5.2 BOLT & WASHER ASSEMBLIESThe diameter of the unthreaded portion of bolt & washer assemblies must be less than the major diameter of the bolt threa
12、d by an amount sufficient to permit free rotation of the washer, while disassembly from the bolt is prevented. The fillet type use for bolt and washer assemblies shall be at the discretion of the manufacturer provided all other requirements of the standard are met.6. WASHERSThe dimensions and tolera
13、nces of the washer component of bolt & washer assemblies must conform to the data specified in the related Ford Standard or Utility Part drawing and WF 900.7. UPPER SURFACE AND BEARING SURFACE OF HEADSThe upper surfaces of heads may be flat or indented at the option of the manufacturer and shall be
14、either chamfered or rounded. The diameter of the top circle must not be greater than the maximum width across flats and not less than 85% of the minimum width across flats.Supplier identification and property class marking embossed or indented on the upper surface must comply with WA 950, unless oth
15、erwise specified on a Utility drawing.8. BOLT THREAD CONFORMANCE8.1 Bolt threads must conform to the dimensions and tolerances specified in ISO 261 and ISO 965, tolerance class 6g, unless otherwise specified on the part drawing. Acceptability of bolt thread gauging shall bedetermined according to IS
16、O 1502. Acceptability of thread damage due to nicks and gouges shall be determined according to WA 990.8.2 Bolt threads with a protective finish may require additional allowance to accommodate thicker plating and/or coating. The additional allowances are specified in the WX 100 Finish Specification.
17、9. ENDS OF HEXAGON AND FLANGED HEXAGON BOLTSUnless otherwise specified, the ends of hexagon and flanged hexagon bolts shall be the Chamfered End design only.10. PILOT POINT DIMENSIONS10.1 LENGTH AND DIAMETERThe length and diameter of pilot points shall be as specified in Table 1.10.2 ENDS OF PILOT P
18、OINTSEnds of pilot points shall be flat or slightly indented to permit normal material flow as illustrated in Figure 1. All other requirements shall conform to ISO 4753.WORLDWIDE FASTENER STANDARDWA 900 Date: 2017 12 01Copyright 2016, Ford Global Technologies, LLC Page 3 of 12Table 1Size M3 M4 M5 M6
19、 M8 M10 M12 M14 M16 M20 M24Length Lp nom 1.5 2.0 2.5 3.0 4.0 5.0 6.0 7.0 8.0 10.0 12.0+/- 0.25 0.25 0.25 0.25 0.3 0.3 0.3 0.4 0.4 0.4 0.4Diameter dpmax 2.0 2.9 3.75 4.5 6.1 7.8 9.3 11.1 13.2 16.3 19.6min 1.7 2.70 3.55 4.30 5.90 7.60 9.00 10.8 12.9 15.9 19.2Figure 1Figure 2 - Thread length and thread
20、 end details of boltsWORLDWIDE FASTENER STANDARDWA 900 Date: 2017 12 01Copyright 2016, Ford Global Technologies, LLC Page 4 of 12Table 2 - Thread length dimension of boltsSize M5 M6 M8 M10 M12 M14 M16 M20 M24B ref 1) 16 18 22 26 30 34 38 46 542) 40 44 52 60L LsminLgmaxLsminLgmaxLsminLgmaxLsminLgMaxL
21、sminLgmaxLsminLgmaxLsminLgmaxLsminLgmaxLsminLgmax25 5 930 10 14 7 1235 15 19 12 17 6.75 1340 20 24 17 22 11.75 18 6.5 1445 25 29 22 27 16.75 23 11.5 19 6.25 1550 30 34 27 32 21.75 28 16.5 24 11.2 20 6 1655 32 37 26.75 33 21.5 29 16.2 25 11 21 7 1760 37 42 31.75 38 26.5 34 21.2 30 16 26 12 2265 36.75
22、 43 31.5 39 26.2 35 21 31 17 27 6.5 1970 41.75 48 36.5 44 31.2 40 26 36 22 32 11.5 2475 46.75 53 41.5 49 36.2 45 31 41 27 37 16.5 2980 51.75 58 46.5 54 41.2 50 36 46 32 42 21.5 34 11 2685 51.5 59 46.2 55 41 51 37 47 26.5 39 16 3190 56.5 64 51.2 60 46 56 42 52 31.5 44 21 3695 61.5 69 56.2 65 51 61 47
23、 57 36.5 49 26 41100 66.5 74 61.2 70 56 66 52 62 41.5 54 31 46105 66.2 75 61 71 57 67 46.5 59 36 51110 71.2 80 66 76 62 72 51.5 64 41 56120 81.2 90 76 86 72 82 61.5 74 51 66130 80 90 76 86 65.5 78 55 70140 90 100 86 96 75.5 88 65 80150 96 106 85.5 98 75 901) For L up to and including 1252) For L gre
24、ater than 125Lsi min = 0.5 d (diameter) see table 511. DIAGRAMS AND TABLES TO ASSIST DESIGN ENGINEERINGThe following diagrams and tables have been included to assist Design Engineers.WORLDWIDE FASTENER STANDARDWA 900 Date: 2017 12 01Copyright 2016, Ford Global Technologies, LLC Page 5 of 12Figure 3
25、- Head detail of hexagon head boltsINDENTATION AND ITSSHAPE OPTIONALWASHER FACE ORCHAMFER OPTIONALCHAMFEROR FREE FLOWRADIUSTable 3 - Head dimensions of hexagon head boltsSize M4 M5 M6 M8 M10 M12 M14 M16 M20 M24s max 7 8 10 13 15 18 21 24 30 36min 6.78 7.78 9.78 12.73 14.73 17.73 20.67 23.67 29.67 35
26、.38e min 7.66 8.79 11.05 14.38 16.77 20.03 23.36 26.75 33.53 39.98k 1) max 2.925 3.65 4.15 5.45 6.58 7.68 8.98 10.18 12.715 15.215min 2.675 3.35 3.85 5.15 6.22 7.32 8.62 9.82 12.285 14.785k (kw) ref 1.87 2.35 2.70 3.61 4.35 5.12 6.03 6.87 8.60 10.35dw 2) min 5.88 6.88 8.88 11.63 13.63 16.63 19.64 22
27、.49 28.19 33.61c max 0.4 0.5 0.5 0.6 0.6 0.6 0.6 0.8 0.8 0.8min 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.20 0.20 0.201) Embossed head markings (See WA 950) are excluded from head height measurements but must not protrude more than 0.4.2) dw max must not exceed dimension s actual.WORLDWIDE FASTENER STAND
28、ARDWA 900 Date: 2017 12 01Copyright 2016, Ford Global Technologies, LLC Page 6 of 12Figure 4 - Fillet and thread runout of fully threaded hexagon head boltsadaaaadr rDetail X. Alternative thread runouts Xds Pitch dia.Permissible shapeTable 4 - Fillet and thread runout dimensions of fully threaded he
29、xagon head boltsSize M4 M5 M6 M8 M10 M12 M14 M16 M20 M24Pitch 0.7 0.8 1.0 1.25 1.5 1.75 2.0 2.0 2.5 3.0a max 1) L2.5d 2.1 2.4 3.0 4.0 4.5 5.3 6.0 6.0 7.5 9.0da Max 4.7 5.7 6.8 9.2 11.2 13.7 15.7 17.7 22.4 26.4r Min 0.2 0.2 0.25 0.4 0.4 0.6 0.6 0.6 0.8 0.8a max =The distance from the underhead bearin
30、g surface to the leading face of a thread ring gauge which has been screwed as far as possible onto the bolt by hand. a min = 1 PitchWORLDWIDE FASTENER STANDARDWA 900 Date: 2017 12 01Copyright 2016, Ford Global Technologies, LLC Page 7 of 12Figure 5 - Fillet and shank details of partial threaded hex
31、agon head boltsWASHER FACE ORCHAMFER OPTIONALLsiXdsdsifDetail Xda dsrNOTE: The radius under the head need not be a true radius providing that the curve is smooth and lies wholly within the shaded area shown in Detail X above, and must not extend into the bearing surface beyond the maximum transition
32、al da specified in Table 5.Table 5 - Fillet and shank dimensions of partial threaded hexagon head boltsSize M4 M5 M6 M8 M10 M12 M14 M16 M20 M24da max 4.7 5.7 6.8 9.2 11.2 13.7 15.7 17.7 22.4 26.4f max 1.2 1.2 1.4 2.0 2.0 3.0 3.0 3.0 4.0 4.0r min 0.2 0.2 0.25 0.4 0.4 0.6 0.6 0.6 0.8 0.8ds max 4 5 6 8
33、 10 12 14 16 20 24min 3.82 4.82 5.82 7.78 9.78 11.73 13.73 15.73 19.67 23.67dsi max 3.6 4.5 5.6 7.4 9.4 11.2 13 15 19 23min 3.4 4.3 5.2 7 8.9 10.7 12.5 14.5 18.2 21.8Lsi min 2 2.5 3 4 5 6 7 8 10 12WORLDWIDE FASTENER STANDARDWA 900 Date: 2017 12 01Copyright 2016, Ford Global Technologies, LLC Page 8
34、of 12Figure 6 - Head and flange details of hexagon flange boltsTable 6 - Head and flange dimensions of hexagon flange boltsSize M5 M6 M8 M10 M12 M14 M16s max 7 8 10 13 15 18 21min 6.78 7.78 9.78 12.73 14.73 17.73 20.67e min 7.44 8.56 10.80 14.08 16.5 19.68 23.58k 1) max 5.6 6.8 8.5 9.7 11.9 12.9 15.
35、2min 4.8 5.9 7.2 8.2 10.3 11.5 13kw min 2.3 2.9 3.8 4.3 5.4 5.6 6.8dc max 11.4 13.6 17 20.8 24.7 28.6 32.8min cf 1 1.1 1.2 1.5 1.8 2.1 2.4ct 1.5 2 2 3 3 3.1 3.25r2 2) max 0.3 0.4 0.5 0.6 0.7 0.9 11) Embossed head markings (See WA 950) are excluded from head height measurements but must not protrude
36、more than 0.4.2) Radius r2 applies both at the corners and at the flats of the hexagon.3) The top of the head shall be either full form or indented at the manufacturesoption and shall be either chamfered or rounded. The minimum diameter of the chamfer or start of rounding shall be the maximum width
37、across flats minus 15%. If the top of the head is indented, the periphery may be rounded. WORLDWIDE FASTENER STANDARDWA 900 Date: 2017 12 01Copyright 2016, Ford Global Technologies, LLC Page 9 of 12Figure 7 - Fillet, bearing surface and thread runout details of fully threaded hexagon flange boltsNot
38、e: The fillet type is not an optional requirement, Type F fillet shall be supplied for all parts unless the type U is specified on the part print or product standard.Figure 8 - Fillet, bearing surface and shank details of partial threaded hexagon flange boltsNote: The fillet type is not an optional
39、requirement, Type F fillet shall be supplied for all parts unless the type U is specified on the part print or product standard.WORLDWIDE FASTENER STANDARDWA 900 Date: 2017 12 01Copyright 2016, Ford Global Technologies, LLC Page 10 of 12Figure 9 a MAX details of fully threaded bolt & washer assembli
40、esNOTE: The radius under the head need not be a true radius providing that the curve is smooth and lies wholly within the shaded area shown in Detail X above, and must not extend into the bearing surface beyond the maximum transitional diameter da specified in Table 7.Table 7 - DimensionsSize M5 M6
41、M8 M10 M12 M14 M16 ISO Referencea max 1) L2.5d 2.4 3 3.8 4.5 5.3 6 6 4017dw min 9.4 11.6 14.9 18.7 22.5 26.4 30.6 15071r1 min 0.2 0.25 0.4 0.4 0.6 0.6 0.6 15071r3 min 0.10 0.11 0.16 0.20 0.24 0.28 0.32 15071r4 ref 4.0 4.4 5.7 5.7 5.7 5.7 5.8 15071da max2) Type F 5.7 6.8 9.2 11.2 13.7 15.7 17.7 15071
42、Type U 6.2 7.5 10 12.5 15.2 17.7 20.5 15071dV max 5.5 6.6 8.8 10.8 12.8 14.8 17.2 15071ds max 5 6 8 10 12 14 16 15071min 4.82 5.82 7.78 9.78 11.73 13.73 15.73 15071V max 0.15 0.20 0.25 0.30 0.35 0.45 0.50 15071min 0.05 0.05 0.10 0.15 0.15 0.20 0.25 15071Lf max 1.4 1.6 2.1 2.1 2.1 2.1 3.2 15071dsi ma
43、x 4.5 5.6 7.4 9.4 11.2 13 15 15071min 4.3 5.2 7 8.9 10.7 12.5 14.5 15071Lsi 3) min 2.5 3 4 5 6 7 8 150711) a max = The distance from the underhead bearing surface to the leading face of a thread ring gauge which has been screwed as far as possible onto the bolt by hand. a min = 1 Pitch. For bolt & w
44、asher assemblies, a shall be measured from the washer, instead of the underhead bearing surface.2) The minimum size hole required to prevent fillet interference is da max for Type F and dV max for Type U.3) Lsi equals 0.5d+ 1/- 0.0WORLDWIDE FASTENER STANDARDWA 900 Date: 2017 12 01Copyright 2016, For
45、d Global Technologies, LLC Page 11 of 1212. SUMMARY OF REVISIONS2017 12 01 (December 2017)Table 6 corrections for e min M5: 7.59 to 7.44, M6: 8.71 to 8.56, M8: 10.95 to 10.8, M10: 14.26 to 14.08, M16: 23.15 to 22.58. M6 kMax from 6.9 to 6.8February 2017 (2017 02 22)In Table 6, the M12 k MAX dimensio
46、n was corrected to 11.9 MAX and the M14 e value was corrected to 19.68.November 2016Added ISO 4014 and ISO 4017 to Section 2Deleted ISO Type F illustration from Fig. 7Added Fig. 9.Added description for measuring a dimension for bolt&washer assembliesDecember 2011Table 7, Note 2 clarified minimum hol
47、e size requirementAugust 2009Updated the reference to ISO 6157 in Section 2 was updated to ISO 6157-3.In Table 3, the M10 dw dimension was corrected to 13.63.March 2007In the September 2006 update the following note was added to Figure 7 and Figure 8:Note: The fillet type is not an optional requirem
48、ent, Type F fillet shall be supplied for all parts unless the type U is specified on the part print or product standard.Note: An audit of current production indicated that Type F fillets are normal production , type U is only being supplied when specifically requested. Prior to the clarification, if
49、 any part is being supplied with a type U undercut that is not specifically requested the PPAP process shall be used to change to type F and comply with this standard.The following note was added to 5.2:The fillet type use for bolt and washer assemblies shall be at the discretion of the manufacturer provided all other requirements of the standard are met.Tables 7 & 8 were combined, and the ISO reference column was added.November 2005In the November 2005 update, diagrams and tables showing the head dimensions were included in the standard. The intent is to make t
