1、 WORLDWIDE FASTENER STANDARD WA 900 Date: 2016 11 02 Printed copies are uncontrolled Copyright 2016, Ford Global Technologies, LLC Page 1 of 12 Dimensional Requirements of Hexagon Bolts, Flanged Hexagon Bolts and Hexagon Bolt&Washer Assemblies 1. SCOPE This standard gives dimensional requirements fo
2、r hexagon bolts, flanged hexagon bolts 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. REFERENCES ISO 261 General purpose metric screw threads - General plan. ISO 965 General purpose metric scre
3、w threads - Tolerances. ISO 1502 General purpose 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 externa
4、l Metric ISO thread. ISO 6157-3 Fasteners Surface 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 Dimensio
5、nal, Material, Heat Treatment, Hardness and Performance Requirements for Flat, Toothed, Conical, Bowed and Wavy Washers for general use and for use in Screw or Nut and Washer Assemblies. 3. GENERAL REQUIREMENTS 3.1 DIMENSIONS AND TOLERANCES The basic dimensions are shown in the individual product st
6、andards or Utility Part drawings. Unspecified dimensions 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
7、bolts. ISO 4014 Product grade A for the head of hexagon headed products. 3.2 GAUGING REQUIREMENTS The 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
8、 for the fully threaded shank portion of hexagon and hexagon flange headed bolts. ISO 4014 Product grade A for the head of hexagon headed products. 3.3 PROTECTIVE FINISH All dimensions and tolerances defined in this specification apply prior to the application of the protective finish except where o
9、therwise specified. Note: For dimensions and tolerances of plated bolt threads see Clause 8. 4. LENGTH 4.1 BOLT & WASHER ASSEMBLIES Bolt & 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 t
10、he assembled washer plus 2.5 x the thread pitch for lengths up to and 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 STANDARD WA 900 Date: 2016 11 02 Printed copies are uncontrolled Copyrigh
11、t 2016, Ford Global Technologies, LLC Page 2 of 12 5. DIAMETER OF SHANK (unthreaded portion). 5.1 BOLTS Reduced 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 ASSEMBLIES The diamete
12、r of the unthreaded portion of bolt & washer assemblies must be less than the major diameter of the bolt thread 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 o
13、f the manufacturer provided all other requirements of the standard are met. 6. WASHERS The dimensions and tolerances 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 SU
14、RFACE OF HEADS The upper surfaces of heads may be flat or indented at the option of the manufacturer and shall be 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 iden
15、tification and property class marking embossed or indented on the upper surface must comply with WA 950, unless otherwise specified on a Utility drawing. 8. BOLT THREAD CONFORMANCE 8.1 Bolt threads must conform to the dimensions and tolerances specified in ISO 261 and ISO 965, tolerance class 6g, un
16、less otherwise specified on the part drawing. Acceptability of bolt thread gauging shall be determined according to ISO 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
17、accommodate thicker plating and/or coating. The additional allowances are specified in the WX 100 Finish Specification. 9. ENDS OF HEXAGON AND FLANGED HEXAGON BOLTS Unless otherwise specified, the ends of hexagon and flanged hexagon bolts shall be the Chamfered End design only. 10. PILOT POINT DIMEN
18、SIONS 10.1 LENGTH AND DIAMETER The length and diameter of pilot points shall be as specified in Table 1. 10.2 ENDS OF PILOT POINTS Ends 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. WORL
19、DWIDE FASTENER STANDARD WA 900 Date: 2016 11 02 Printed copies are uncontrolled Copyright 2016, Ford Global Technologies, LLC Page 3 of 12 Table 1 Size M3 M4 M5 M6 M8 M10 M12 M14 M16 M20 M24 Length 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
20、.4 Diameter dp max 2.0 2.9 3.75 4.5 6.1 7.8 9.3 11.1 13.2 16.3 19.6 min 1.7 2.70 3.55 4.30 5.90 7.60 9.00 10.8 12.9 15.9 19.2 Figure 1 Figure 2 - Thread length and thread end details of bolts WORLDWIDE FASTENER STANDARD WA 900 Date: 2016 11 02 Printed copies are uncontrolled Copyright 2016, Ford Glo
21、bal Technologies, LLC Page 4 of 12 Table 2 - Thread length dimension of bolts Size M5 M6 M8 M10 M12 M14 M16 M20 M24 B ref 1) 16 18 22 26 30 34 38 46 54 2) 40 44 52 60 L Ls min Lg max Ls min Lg max Ls min Lg max Ls min Lg Max Ls min Lg max Ls min Lg max Ls min Lg max Ls min Lg max Ls min Lg max 25 5
22、9 30 10 14 7 12 35 15 19 12 17 6.75 13 40 20 24 17 22 11.75 18 6.5 14 45 25 29 22 27 16.75 23 11.5 19 6.25 15 50 30 34 27 32 21.75 28 16.5 24 11.25 20 6 16 55 32 37 26.75 33 21.5 29 16.25 25 11 21 7 17 60 37 42 31.75 38 26.5 34 21.25 30 16 26 12 22 65 36.75 43 31.5 39 26.25 35 21 31 17 27 6.5 19 70
23、41.75 48 36.5 44 31.25 40 26 36 22 32 11.5 24 75 46.75 53 41.5 49 36.25 45 31 41 27 37 16.5 29 80 51.75 58 46.5 54 41.25 50 36 46 32 42 21.5 34 11 26 85 51.5 59 46.25 55 41 51 37 47 26.5 39 16 31 90 56.5 64 51.25 60 46 56 42 52 31.5 44 21 36 95 61.5 69 56.25 65 51 61 47 57 36.5 49 26 41 100 66.5 74
24、61.25 70 56 66 52 62 41.5 54 31 46 105 66.25 75 61 71 57 67 46.5 59 36 51 110 71.25 80 66 76 62 72 51.5 64 41 56 120 81.25 90 76 86 72 82 61.5 74 51 66 130 80 90 76 86 65.5 78 55 70 140 90 100 86 96 75.5 88 65 80 150 96 106 85.5 98 75 90 1) For L up to and including 125 2) For L greater than 125 Lsi
25、 min = 0.5 d (diameter) see table 5 11. DIAGRAMS AND TABLES TO ASSIST DESIGN ENGINEERING The following diagrams and tables have been included to assist Design Engineers. WORLDWIDE FASTENER STANDARD WA 900 Date: 2016 11 02 Printed copies are uncontrolled Copyright 2016, Ford Global Technologies, LLC
26、Page 5 of 12 Figure 3 - Head detail of hexagon head boltsINDEN TATIO N AND I TSSHAPE OPTIONALWA SHE R FAC E ORCHAMFER OPTIO NALCHAMFEROR FREE FL OWRADIUSTable 3 - Head dimensions of hexagon head bolts Size M4 M5 M6 M8 M10 M12 M14 M16 M20 M24 s max 7 8 10 13 15 18 21 24 30 36 min 6.78 7.78 9.78 12.73
27、 14.73 17.73 20.67 23.67 29.67 35.38 e min 7.66 8.79 11.05 14.38 16.77 20.03 23.36 26.75 33.53 39.98 k 1) max 2.925 3.65 4.15 5.45 6.58 7.68 8.98 10.18 12.715 15.215 min 2.675 3.35 3.85 5.15 6.22 7.32 8.62 9.82 12.285 14.785 k (kw) ref 1.87 2.35 2.70 3.61 4.35 5.12 6.03 6.87 8.60 10.35 dw 2) min 5.8
28、8 6.88 8.88 11.63 13.63 16.63 19.64 22.49 28.19 33.61 c max 0.4 0.5 0.5 0.6 0.6 0.6 0.6 0.8 0.8 0.8 min 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.20 0.20 0.20 1) 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 d
29、imension s actual. WORLDWIDE FASTENER STANDARD WA 900 Date: 2016 11 02 Printed copies are uncontrolled Copyright 2016, Ford Global Technologies, LLC Page 6 of 12 Figure 4 - Fillet and thread runout of fully threaded hexagon head bolts ad aaaadrrDetail X. A lternat ive t hr ea d ru no ut s Xds P itch
30、 di a.Permissible sh apeTable 4 - Fillet and thread runout dimensions of fully threaded hexagon head bolts Size M4 M5 M6 M8 M10 M12 M14 M16 M20 M24 Pitch 0.7 0.8 1.0 1.25 1.5 1.75 2.0 2.0 2.5 3.0 a max 1) L2.5d 2.1 2.4 3.0 4.0 4.5 5.3 6.0 6.0 7.5 9.0 da Max 4.7 5.7 6.8 9.2 11.2 13.7 15.7 17.7 22.4 2
31、6.4 r Min 0.2 0.2 0.25 0.4 0.4 0.6 0.6 0.6 0.8 0.8 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 WORLDWIDE FASTENER STANDARD WA 900 Date: 2016 11 02 Printed copies ar
32、e uncontrolled Copyright 2016, Ford Global Technologies, LLC Page 7 of 12 Figure 5 - Fillet and shank details of partial threaded hexagon head bolts W ASHER F AC E O RCHAM F ER OPT I O N A LLsiXdsdsifDe tai l Xda dsrNOTE: The radius under the head need not be a true radius providing that the curve i
33、s 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 da specified in Table 5. Table 5 - Fillet and shank dimensions of partial threaded hexagon head bolts Size M4 M5 M6 M8 M10 M12 M14 M16 M20 M24 da max
34、4.7 5.7 6.8 9.2 11.2 13.7 15.7 17.7 22.4 26.4 f max 1.2 1.2 1.4 2.0 2.0 3.0 3.0 3.0 4.0 4.0 r min 0.2 0.2 0.25 0.4 0.4 0.6 0.6 0.6 0.8 0.8 ds max 4 5 6 8 10 12 14 16 20 24 min 3.82 4.82 5.82 7.78 9.78 11.73 13.73 15.73 19.67 23.67 dsi max 3.6 4.5 5.6 7.4 9.4 11.2 13 15 19 23 min 3.4 4.3 5.2 7 8.9 10
35、.7 12.5 14.5 18.2 21.8 Lsi min 2 2.5 3 4 5 6 7 8 10 12 WORLDWIDE FASTENER STANDARD WA 900 Date: 2016 11 02 Printed copies are uncontrolled Copyright 2016, Ford Global Technologies, LLC Page 8 of 12 Figure 6 - Head and flange details of hexagon flange bolts Table 6 - Head and flange dimensions of hex
36、agon flange bolts Size M5 M6 M8 M10 M12 M14 M16 s max 7 8 10 13 15 18 21 min 6.78 7.78 9.78 12.73 14.73 17.73 20.67 e min 7.59 8.71 10.95 14.26 16.5 19.86 23.15 k 1) max 5.6 6.9 8.5 9.7 12.1 12.9 15.2 min 4.8 5.9 7.2 8.2 10.3 11.5 13 kw min 2.3 2.9 3.8 4.3 5.4 5.6 6.8 dc max 11.4 13.6 17 20.8 24.7 2
37、8.6 32.8 min cf 1 1.1 1.2 1.5 1.8 2.1 2.4 ct 1.5 2 2 3 3 3.1 3.25 r2 2) max 0.3 0.4 0.5 0.6 0.7 0.9 1 1) Embossed head markings (See WA 950) are excluded from head height measurements but must not protrude more than 0.4. 2) Radius r2 applies both at the corners and at the flats of the hexagon. 3) Th
38、e top of the head shall be either full form or indented at the manufactures option and shall be either chamfered or rounded. The minimum diameter of the chamfer or start of rounding shall be the maximum width across flats minus 15%. If the top of the head is indented, the periphery may be rounded. W
39、ORLDWIDE FASTENER STANDARD WA 900 Date: 2016 11 02 Printed copies are uncontrolled Copyright 2016, Ford Global Technologies, LLC Page 9 of 12 Figure 7 - Fillet, bearing surface and thread runout details of fully threaded hexagon flange bolts Note: The fillet type is not an optional requirement, Type
40、 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 bolts Note: The fillet type is not an optional requirement, Type F fillet shall be supplied for all
41、parts unless the type U is specified on the part print or product standard. WORLDWIDE FASTENER STANDARD WA 900 Date: 2016 11 02 Printed copies are uncontrolled Copyright 2016, Ford Global Technologies, LLC Page 10 of 12 Figure 9 a MAX details of fully threaded bolt & washer assemblies NOTE: The radi
42、us 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 - Dimensions Size M5 M6 M8 M10 M12 M14
43、 M16 ISO Reference a max 1) L2.5d 2.4 3 3.8 4.5 5.3 6 6 4017 dw min 9.4 11.6 14.9 18.7 22.5 26.4 30.6 15071 r1 min 0.2 0.25 0.4 0.4 0.6 0.6 0.6 15071 r3 min 0.10 0.11 0.16 0.20 0.24 0.28 0.32 15071 r4 ref 4.0 4.4 5.7 5.7 5.7 5.7 5.8 15071 da max2) Type F 5.7 6.8 9.2 11.2 13.7 15.7 17.7 15071 Type U
44、6.2 7.5 10 12.5 15.2 17.7 20.5 15071 dV max 5.5 6.6 8.8 10.8 12.8 14.8 17.2 15071 ds max 5 6 8 10 12 14 16 15071 min 4.82 5.82 7.78 9.78 11.73 13.73 15.73 15071 V max 0.15 0.20 0.25 0.30 0.35 0.45 0.50 15071 min 0.05 0.05 0.10 0.15 0.15 0.20 0.25 15071 Lf max 1.4 1.6 2.1 2.1 2.1 2.1 3.2 15071 dsi ma
45、x 4.5 5.6 7.4 9.4 11.2 13 15 15071 min 4.3 5.2 7 8.9 10.7 12.5 14.5 15071 Lsi 3) min 2.5 3 4 5 6 7 8 15071 1) 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
46、& washer 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/- 0.0 WORLDWIDE FASTENER STANDARD WA 900 Date: 2016 11 02 Printed c
47、opies are uncontrolled Copyright 2016, Ford Global Technologies, LLC Page 11 of 12 12. SUMMARY OF REVISIONS November 2016 Added ISO 4014 and ISO 4017 to Section 2 Deleted ISO Type F illustration from Fig. 7 Added Fig. 9. Added description for measuring a dimension for bolt&washer assemblies December
48、 2011 Table 7, Note 2 clarified minimum hole size requirement August 2009 Updated 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 2007 In the September 2006 update the following note was added to Figure 7 and Figure 8:
49、Note: 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. 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 any part is being supplied with a type U undercut that is not specifically requested the PPAP proces
