1、October 2007DEUTSCHE NORM English price group 7No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 21.060.10!$K3j“14016
2、71www.din.deDDIN 7969Slotted countersunk head bolts for structural steel bolting, for supplywith hexagon nutsSenkschrauben mit Schlitz mit Sechskantmutter fr StahlkonstruktionenSupersedesDIN 7969:2007-07www.beuth.deDocument comprises 8 pagesIn case of doubt, the German-language original should be co
3、nsulted as the authoritative text.Translation by DIN-Sprachendienst.DIN 7969:2007-10 2 Foreword This standard has been prepared by the Normenausschuss Mechanische Verbindungselemente (Fasteners Standards Committee), Technical Committee NA 067-03-04 AA Schraubenverbindungen fr den Stahlbau. The DIN 4
4、000-160-3 tabular layout of article characteristics shall apply to countersunk head bolts covered in this standard. Amendments This standard differs from DIN 7969:1999-12 as follows: a) Nominal size M10 has been dropped. b) The values of slot dimensions n and t have been amended. c) Length tolerance
5、 js 17 has been included. d) The values of shank length lshave been amended. e) Clause 8 “Grip length” has been added. f) Some nominal lengths have been deleted. Compared with DIN 7969:2007-07, the following corrections have been made to the German language edition: a) The reference to Table 3 given
6、 in “Amendments” under item e) has been changed to Table 4. b) In Table 1 the text of footnote b has been exchanged with that of footnote c. Previous editions DIN 7969: 1955-07, 1963-03, 1970-12, 1989-10, 1999-12, 2007-07 1 Scope This standard specifies dimensions and technical delivery conditions f
7、or M12 to M24 slotted countersunk head bolts of product grade C for use in structural steel bolting. It also specifies the nuts and washers to be used. Countersunk head bolts complying with this standard are also suitable for use in aluminium structures and in composite construction. 2 Normative ref
8、erences The following reference documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 13-20, General purpose ISO metric scre
9、w threads Part 20: Limits of size for 1 mm to 68 mm diameter coarse pitch threads with recommended tolerance classes DIN 7969:2007-10 3 DIN 4000-160, Tabular layout of product properties Part 160: Fasteners with external thread DIN 7989-1, Washers for use in structural steelwork Part 1: Product grad
10、e C DIN 7989-2, Washers for use in structural steelwork Part 2: Product grade A DIN EN 20898-2, Mechanical properties of fasteners Part 2: Nuts with specified proof load values; coarse thread DIN EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, scr
11、ews and studs DIN EN ISO 3269, Fasteners Acceptance inspection DIN EN ISO 4032, Hexagon nuts, style 1 Product grades A and B DIN EN ISO 4034, Hexagon nuts Product grade C DIN EN ISO 4753, Fasteners Ends of parts with external ISO metric screw thread DIN EN ISO 4759-1, Tolerances for fasteners Part 1
12、: Bolts, screws, studs and fit bolts Product grades A, B and C DIN EN ISO 10684, Fasteners Hot dip galvanized coatings DIN ISO 965-4, ISO general purpose metric screw threads Tolerances Part 4: Limits of sizes for hot-dip galvanized external screw threads to mate with internal screw threads tapped w
13、ith tolerance position H or G after galvanizing DIN ISO 965-5, ISO general purpose metric screw threads Tolerances Part 5: Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance position h before galvanizing DIN ISO 8992, Fast
14、eners General requirements for bolts, screws, studs and nuts DIN 7969:2007-10 4 3 Dimensions Bolt dimensions shall be as given in Figure 1 and Table 1. Key 1 Hexagon nut as in DIN EN ISO 4032 or DIN EN ISO 4034 aEnd chamfered (CH) as in DIN EN ISO 4753. bLength of incomplete thread, u 2 P. Figure 1
15、Bolt dimensions (notation) All dimensions shall apply to bolts in the as-processed condition (i.e. before a surface finish is applied). DIN 7969:2007-10 5 Table 1 Bolt dimensions Dimensions in millimetresThread size (d) M12 M16 M20 M24 Pa1,75 2 2,5 3 75+ 5060+ 50min. 13,7 18,6 21,4 25,6 a max. f 14,
16、7 19,6 22,4 26,6 22 28 32 38 b b(auxiliary dimension) c28 35 40 50 max. = nominal size 21 28 32 38 dkmin. 20,48 27,48 31,38 37,38 Nominal size 12 16 20 24 min. 11,3 15,3 19,16 23,16 dsmax. 12,7 16,7 20,84 24,84 e min. 19,85 26,17 32,95 39,55 Nominal size 7 9 11,5 13 min. 6,71 8,71 11,15 12,65 k max.
17、 7,29 9,29 11,85 13,35 min. = nominal size 2,5 2,5 3 3 n max. 3 3 3,5 3,5 t min. 3,5 3,5 l Lengths lgeand lsfNominal size min. max. lsmin. lgmax. lsmin. lgmax. lsmin. lgmax. lsmin. lgmax. 35 33,75 36,25 15,75 40 38,75 41,25 9,25 18 45 43,75 46,25 14,25 23 19 50 48,75 51,25 19,25 28 12 22 24 55 53,5
18、56,5 24,25 33 17 27 24 60 58,5 61,5 29,25 38 22 32 15,5 28 28 65 63,5 66,5 28,25 37 27 37 20,5 33 28 70 68,5 71,5 33,25 42 32 42 25,5 38 17 32 75 73,5 76,5 38,25 47 37 47 30,5 43 22 37 80 78,5 81,5 43,25 52 42 52 35,5 48 27 42 90 88,25 91,75 53,25 62 45 55 37,5 50 25 40 100 98,25 101,75 63,25 72 55
19、65 47,5 60 35 50 110 108,25 111,75 73,25 82 65 75 57,5 70 45 60 120 118,25 121,75 83,25 92 75 85 67,5 80 55 70 130 129 132 93,25 102 85 95 77,5 90 65 80 140 138 142 103,25 112 95 105 87,5 100 75 90 150 148 152 113,25 122 105 115 97,5 110 85 100 160 158 162 123,25 132 115 125 107,5 120 95 110 Lengths
20、 above the broken line refer to bolts threaded up to the head. aP = pitch of thread. bFor size M12 with l 60 mm and for sizes M16 to M24 with l 80 mm. cFor size M12 with l 60 mm and for sizes M16 to M24 with l 80 mm. dlg max= lnominal size b els min= lg max 5 P famax= 0,7 dk maxDIN 7969:2007-10 6 4
21、Technical delivery conditions See Table 2. Table 2 Technical delivery conditions and reference standards Material Steel General requirements DIN ISO 8992 Tolerance class 6az/6H 8g/7H Thread Standards DIN ISO 965-4, DIN ISO 965-5, DIN 13-20 Property class 4.6 / 5-2aMechanical properties Standards DIN
22、 EN ISO 898-1, DIN EN 20898-2 Product grade CbLimit deviations and geometrical tolerances Standard DIN EN ISO 4759-1 Surface finish Hot dip galvanized as in DIN EN ISO 10684 Other finishes or as processed Acceptance inspection DIN EN ISO 3269 shall apply with regard to acceptance inspection. aThe ad
23、dition of “-2” to the property class indicates that the use of nuts made from free-cutting steel or Thomas steel is excluded. bFor nominal lengths l 150 mm, length tolerance js 17 shall apply. 5 Designation EXAMPLE Designation of an M20 slotted countersunk head bolt for use in structural steel bolti
24、ng, with a nominal length l = 70 mm, of property class 4.6, hot dip galvanized, for supply with a hexagon nut (Mu)1)of property class 5-2: Countersunk head bolt DIN 7969 M20 70 Mu 4.6 tZn 6 Marking Countersunk head bolts shall be marked in accordance with DIN EN ISO 898-1. 1) Where bolts are supplie
25、d ready-packaged in given quantities, the nuts complying with DIN EN ISO 4032 or DIN EN ISO 4034 shall accompany the consignment in a separate pack. DIN 7969:2007-10 7 7 Mass The values given in Table 3 are for guidance only. Table 3 Mass Thread size (d) M12 M16 M20 M24 Length, l, in mm Mass of bolt
26、 + nut (7,85 kg/dm3) in kg/1 000 units 35 46,2 40 51,6 45 56 111 50 60,5 119 194 55 64,9 127 209 60 69,4 135 221 336 65 72,8 143 234 354 70 77,2 151 246 372 75 81,7 159 258 389 80 86,1 167 271 407 90 95 181 292 436 100 104 196 317 471 110 113 212 342 506 120 122 228 366 543 130 131 244 390 578 140 1
27、40 259 415 614 150 149 275 440 649 160 158 291 465 685 Mass of nut, in kg/1 000 units 15,3 36,5 69,3 119 8 Grip length Table 4 specifies requirements for the grip length of countersunk head bolt/nut assemblies which are to be met by the manufacturer and which serve the user as a guide for selecting
28、a suitable nominal length. In assemblies where the grip length is as specified in Table 4 but the washer as in DIN 7989-1 is replaced by other intermediate elements, the latter shall have a total thickness equal to that of the washer. Washers complying with DIN 7989-2 may be used without restriction
29、. NOTE Where countersunk head bolts are to be assembled with nuts conforming to DIN EN ISO 4034 and the grip length is as specified in Table 4, it may be necessary to further reduce the bolt length within the specified tolerance in order to ensure a minimum end protrusion of 1 P (see Figure 2). Use
30、of assemblies with grip lengths deviating from this standard is permitted if the requirements specified in the relevant standards are fulfilled. DIN 7969:2007-10 8 Dimensions in millimetres Key 1 Washer as in DIN 7989-1 2 Hexagon nut as in DIN EN ISO 4032 or DIN EN ISO 4034 Figure 2 Grip length Tabl
31、e 4 Grip lengths Dimensions in millimetres Thread size (d) M12 M16 M20 M24 Grip length, lkaLength, l lkmin. lkmax. lkmin. lkmax. lkmin. lkmax. lkmin. lkmax. 35 11 14 40 13 19 45 18 24 15 20 50 23 29 18 25 20 21 55 28 34 23 30 20 26 60 33 39 28 35 24 31 25 27 65 32 44 33 40 29 36 25 32 70 37 49 38 45
32、 34 41 29 37 75 42 54 43 50 39 46 34 42 80 47 59 48 55 44 51 39 47 90 57 69 51 65 46 61 37 57 100 67 79 61 75 56 71 47 67 110 77 89 71 85 66 81 57 77 120 87 99 81 95 76 91 67 87 130 97 109 91 105 86 101 77 97 140 107 119 101 115 96 111 87 107 150 117 129 111 125 106 121 97 117 160 127 139 121 135 116 131 107 127 alk min= lg max+ 1 P hmin(with hminas in DIN 7989-1) lk max= lnom 1 P mmax hnom(with mmaxas in DIN EN ISO 4032 and hnomas in DIN 7989-1)
