1、April 2008DEUTSCHE 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!$P1“1455814w
2、ww.din.deDDIN 7990Hexagon head bolts with hexagon nut for steel structuresSechskantschrauben mit Sechskantmutter fr StahlkonstruktionenSupersedesDIN 7990:2007-07www.beuth.deIn case of doubt, the German-language original should be consulted as the authoritative text.Translation by DIN-Sprachendienst.
3、Document comprises 10 pagesDIN 7990:2008-04 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 4000-160-2 tabular layout of article chara
4、cteristics shall apply to hexagon head bolts covered in this standard. Amendments This standard differs from DIN 7990:1999-12 as follows: a) Thread length, b, and thread run-out have been amended. b) Length tolerance js 17 has been included. c) Shank lengths and grip lengths have been amended. d) Th
5、e bearing face design is no longer optional. e) Use of intermediate elements besides washers complying with DIN 7989-1 is now also permitted. f) A bolt end extension of 3 mm is now permitted. g) The designation has been amended. This standard differs from DIN 7990:2007-07 as follows: a) In Table 3,
6、the mass for M1280 has been corrected from “99,4” to “100”. b) In Table 3, the mass of “585” has been added for M20180. c) The maximum grip length for M16130 has been corrected from “110,5” to “105,5” In Table 4. d) The minimum grip length for M16135 has been corrected from “110,5” to “105,5” In Tab
7、le 4. e) The maximum grip length for M16135 has been corrected from “115,5” to “110,5” In Table 4. f) The minimum grip length for M16140 has been corrected from “115,5” to “110,5” In Table 4. g) The maximum grip length for M16140 has been corrected from “120,5” to “115,5” In Table 4. h) The minimum
8、grip length for M16145 has been corrected from “120,5” to “115,5” In Table 4. i) The maximum grip length for M16145 has been corrected from “125,5” to “120,5” In Table 4. j) The minimum grip length of “120,5” has been added for M16150 in Table 4. k) The maximum grip length of “125,5” has been added
9、for M16150 in Table 4. l) In Annex A.2 the bolt property class in the example has been corrected from “5.6” to “4.6”. Previous editions DIN 1050 Supplement 2: 1943-12 DIN 7990: 1956-10, 1963-03, 1971-01, 1989-10, 1999-12, 2007-07 DIN 7990:2008-04 3 1 Scope This standard specifies dimensions and tech
10、nical delivery conditions for M12 to M30 hexagon head bolts of product grade C for use in structural steel bolting. It also specifies the nuts and washers to be used. Additional requirements as defined in Annex A may be agreed. Hexagon head bolts complying with this standard are also suitable for us
11、e in aluminium structures and in composite construction. 2 Normative references 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 (inclu
12、ding any amendments) applies. DIN 13-20, General purpose ISO metric screw threads Part 20: Limits of size for 1 mm to 68 mm diameter coarse pitch threads with recommended tolerance classes DIN 4000-160, Tabular layout of product properties Part 160: Fasteners with external thread DIN 7989-1, Washers
13、 for use in structural steelwork Part 1: Product grade 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 ma
14、de of carbon steel and alloy steel Part 1: Bolts, screws 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 thre
15、ad DIN EN ISO 4759-1, Tolerances for fasteners Part 1: 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
16、 threads to mate with internal screw threads tapped with 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 toler
17、ance position h before galvanizing DIN ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts DIN 7990:2008-04 4 3 Dimensions Bolt dimensions shall be as given in Figure 1 and Table 1. Dimensions in millimetres Key 1 Hexagon nut as in DIN EN ISO 4032 or DIN EN ISO 4034 aEnd chamf
18、ered (CH) as in DIN EN ISO 4753. bLength of incomplete thread, u 2 P. cDatum line for dw. Figure 1 Bolt dimensions (notation) All dimensions shall apply to bolts in the as-processed condition (i.e. before a surface finish is applied). DIN 7990:2008-04 5 Table 1 Bolt dimensions Dimensions in millimet
19、resThread size (d) M12 M16 M20 M24 M27 M30 Pa1,75 2 2,5 3 3 3,5 b Auxiliary dimension 20,5 24,5 28,5 33 35,5 38,5 c max. 0,6 0,8 0,8 0,8 0,8 0,8 damax. 14,7 18,7 24,4 28,4 32,4 35,4 Nominal size 12 16 20 24 27 30 min. 11,3 15,3 19,16 23,16 26,16 29,16 dsmax. 12,7 16,7 20,84 24,84 27,84 30,84 dwmin.
20、16,4 22 27,7 33,2 38 42,7 e min. 19,85 26,17 32,95 39,55 45,2 50,85 Nominal size 8 10 13 15 17 19 min. 7,55 9,25 12,1 14,1 16,1 17,95 k max. 8,45 10,75 13,9 15,9 17,9 20,05 kwmin. 5,28 6,47 8,47 9,87 11,27 12,56 r min. 0,6 0,6 0,8 0,8 1 1 max. = nominal size 18 24 30 36 41 46 s min. 17,57 23,16 29,1
21、6 35 40 45 l Lengths lgband lscNominal size min. max. lsmin. lgmax. lsmin. lgmax. lsmin. lgmax. lsmin. lgmax. lsmin. lgmax. lsmin. lgmax.30 28,95 31,05 6 9,5 35 33,75 36,25 11 14,5 6,5 10,5 40 38,75 41,25 16 19,5 11,5 15,5 6,5 11,5 45 43,75 46,25 21 24,5 16,5 20,5 11,5 16,5 6 12 50 48,75 51,25 26 29
22、,5 21,5 25,5 16,5 21,5 11 17 8,5 14,5 55 53,5 56,5 31 34,5 26,5 30,5 21,5 26,5 16 22 13,5 19,5 9,5 16,560 58,5 61,5 36 39,5 31,5 35,5 26,5 31,5 21 27 18,5 24,5 14,5 21,565 63,5 66,5 41 44,5 36,5 40,5 31,5 36,5 26 32 23,5 29,5 19,5 26,570 68,5 71,5 46 49,5 41,5 45,5 36,5 41,5 31 37 28,5 34,5 24,5 31,
23、575 73,5 76,5 51 54,5 46,5 50,5 41,5 46,5 36 42 33,5 39,5 29,5 36,580 78,5 81,5 56 59,5 51,5 55,5 46,5 51,5 41 47 38,5 44,5 34,5 41,585 83,25 86,75 61 64,5 56,5 60,5 51,5 56,5 46 52 43,5 49,5 39,5 46,590 88,25 91,75 66 69,5 61,5 65,5 56,5 61,5 51 57 48,5 54,5 44,5 51,595 93,25 96,75 71 74,5 66,5 70,
24、5 61,5 66,5 56 62 53,5 59,5 49,5 56,5100 98,25 101,75 76 79,5 71,5 75,5 66,5 71,5 61 67 58,5 64,5 54,5 61,5105 103,25 106,75 81 84,5 76,5 80,5 71,5 76,5 66 72 63,5 69,5 59,5 66,5110 108,25 111,75 86 89,5 81,5 85,5 76,5 81,5 71 77 68,5 74,5 64,5 71,5115 113,25 116,75 91 94,5 86,5 90,5 81,5 86,5 76 82
25、 73,5 79,5 69,5 76,5120 118,25 121,75 96 99,5 91,5 95,5 86,5 91,5 81 87 78,5 84,5 74,5 81,5125 123 127 96,5 100,5 91,5 96,5 86 92 83,5 89,5 79,5 86,5130 128 132 101,5 105,5 96,5 101,5 91 97 88,5 94,5 84,5 91,5135 133 137 106,5 110,5 101,5 106,5 96 102 93,5 99,5 89,5 96,5140 138 142 111,5 115,5 106,5
26、 111,5 101 107 98,5 104,5 94,5 101,5145 143 147 116,5 120,5 111,5 116,5 106 112 103,5 109,5 99,5 106,5150 148 152 121,5 125,5 116,5 121,5 111 117 108,5 114,5 104,5 111,5155 153 157 121,5 126,5 116 122 113,5 119,5 109,5 116,5160 158 162 126,5 131,5 121 127 118,5 124,5 114,5 121,5165 163 167 131,5 136
27、,5 126 132 123,5 129,5 119,5 126,5DIN 7990:2008-04 6 Table 1 (continued) Thread size (d) M12 M16 M20 M24 M27 M30 l Lengths lgbund lscNominal size min. max. lsmin. lgmax. lsmin. lgmax. lsmin. lgmax. lsmin. lgmax. lsmin. lgmax. lsmin. lgmax. 170 168 172 136,5 141,5 131 137 128,5 134,5 124,5 131,5175 1
28、73 177 141,5 146,5 136 142 133,5 139,5 129,5 136,5180 178 182 146,5 151,5 141 147 138,5 144,5 134,5 141,5185 182,7 187,3 146 152 143,5 149,5 139,5 146,5190 187,7 192,3 151 157 148,5 154,5 144,5 151,5195 192,7 197,3 156 162 153,5 159,5 149,5 156,5200 197,7 202,3 161 167 158,5 164,5 154,5 161,5aP = pi
29、tch of thread. blg max= lnominal size b cls min= lg max 2 P 4 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 13-2
30、0 Property class 4.6, 5.6 / 5-2aMechanical properties Standards DIN 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
31、 ISO 3269 shall apply with regard to acceptance inspection. aThe addition 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
32、M16 hexagon head bolt for use in structural steel bolting, with a nominal length l = 50 mm, of property class 4.6, hot dip galvanized, for supply with a hexagon nut (Mu)1)of property class 5-2: Hexagon head bolt DIN 7990 M16 50 Mu 4.6 tZn 1) Where bolts are supplied ready-packaged in given quantitie
33、s, the nuts complying with DIN EN ISO 4032 or DIN EN ISO 4034 shall accompany the consignment in a separate pack. DIN 7990:2008-04 7 6 Marking Hexagon head bolts shall be marked in accordance with DIN EN ISO 898-1 and with the DIN number (7990). 7 Mass The values given in Table 3 are for guidance on
34、ly. Table 3 Mass Thread size (d) M12 M16 M20 M24 M27 M30 Length, l, in mm Mass of bolt + nut (7,85 kg/dm3) in kg/1 000 units 30 56,2 35 60,6 125 40 65 133 249 45 69,4 141 261 393 50 73,8 149 273 411 55 78,2 157 285 429 60 82,6 165 297 447 611 65 87 173 309 465 633 70 91,4 181 321 483 655 75 95,8 189
35、 333 501 677 80 100 197 345 519 699 920 85 104 205 357 537 721 948 90 108 213 369 555 743 976 95 112 221 381 573 765 1004 100 116 229 393 591 787 1032 105 120 240 405 609 809 1060 110 124 245 417 627 831 1088 115 128 253 429 645 853 1116 120 132 261 441 663 875 1144 125 269 453 681 897 1172 130 277
36、465 699 919 1200 135 285 477 717 941 1228 140 293 489 735 963 1256 145 301 501 753 985 1284 150 309 513 771 1007 1312 155 525 789 1029 1340 160 537 807 1051 1368 165 549 825 1073 1396 170 561 843 1095 1424 175 573 861 1117 1452 180 585 879 1139 1480 185 897 1161 1508 190 915 1183 1536 195 933 1205 1
37、564 200 951 1227 1592 Mass of nut, in kg/1000 units 15,3 36,5 69,3 119 170 234 DIN 7990:2008-04 8 8 Grip length Table 4 specifies requirements for the grip length of hexagon head bolt/nut assemblies which are to be met by the manufacturer and which serve the user as a guide for selecting a suitable
38、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. NOTE Wher
39、e hexagon 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 of assemblies w
40、ith grip lengths deviating from this standard is permitted if the requirements specified in the relevant standards are fulfilled. 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 (optional) Figure 2 Grip length DIN 7990:2008-04 9 Table 4
41、Grip lengths Dimensions in millimetresThread size (d) M12 M16 M20 M24 M27 M30 Grip length, lkaLength, l min. max. min. max. min. max. min. max. min. max. min. max. 30 4,5 9,5 35 9,5 14,5 5,5 10,5 40 14,5 19,5 10,5 15,5 7 12 45 19,5 24,5 15,5 20,5 12 17 8 13 50 24,5 29,5 20,5 25,5 17 22 13 18 10,5 15
42、,5 55 29,5 34,5 25,5 30,5 22 27 18 23 15,5 20,5 13 18 60 34,5 39,5 30,5 35,5 27 32 23 28 20,5 25,5 18 23 65 39,5 44,5 35,5 40,5 32 37 28 33 25,5 30,5 23 28 70 44,5 49,5 40,5 45,5 37 42 33 38 30,5 35,5 28 33 75 49,5 54,5 45,5 50,5 42 47 38 43 35,5 40,5 33 38 80 54,5 59,5 50,5 55,5 47 52 43 48 40,5 45
43、,5 38 43 85 59,5 64,5 55,5 60,5 52 57 48 53 45,5 50,5 43 48 90 64,5 69,5 60,5 65,5 57 62 53 58 50,5 55,5 48 53 95 69,5 74,5 65,5 70,5 62 67 58 63 55,5 60,5 53 58 100 74,5 79,5 70,5 75,5 67 72 63 68 60,5 65,5 58 63 105 79,5 84,5 75,5 80,5 72 77 68 73 65,5 70,5 63 68 110 84,5 89,5 80,5 85,5 77 82 73 7
44、8 70,5 75,5 68 73 115 89,5 94,5 85,5 90,5 82 87 78 83 75,5 80,5 73 78 120 94,5 99,5 90,5 95,5 87 92 83 88 80,5 85,5 78 83 125 95,5 100,5 92 97 88 93 85,5 90,5 83 88 130 100,5 105,5 97 102 93 98 90,5 95,5 88 93 135 105,5 110,5 102 107 98 103 95,5 100,5 93 98 140 110,5 115,5 107 112 103 108 100,5 105,
45、5 98 103 145 115,5 120,5 112 117 108 113 105,5 110,5 103 108 150 120,5 125,5 117 122 113 118 110,5 115,5 108 113 155 122 127 118 123 115,5 120,5 113 118 160 127 132 123 128 120,5 125,5 118 123 165 132 137 128 133 125,5 130,5 123 128 170 137 142 133 138 130,5 135,5 128 133 175 142 147 138 143 135,5 1
46、40,5 133 138 180 147 152 143 148 140,5 145,5 138 143 185 148 153 145,5 150,5 143 148 190 153 158 150,5 155,5 148 153 195 158 163 155,5 160,5 153 158 200 163 168 160,5 165,5 158 163 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 hnom
47、as in DIN 7989-1) DIN 7990:2008-04 10 Annex A (normative) Additional requirements A.1 General Additional requirements may apply for specific applications in metal construction. These are to be agreed at the time of ordering if they do not contradict the basic requirements laid down in this standard.
48、 Such additional requirements may deal with marking, surface finish, a particular thread tolerance or an extended bolt end (which has no effect on the remaining bolt geometry). A.2 Designation of bolts with extended end EXAMPLE Designation of an M16 hexagon head bolt for use in structural steel bolt
49、ing, with a nominal length l = 50 mm, with the bolt end extended by 3 mm (+3), of property class 4.6, hot dip galvanized, for supply with a hexagon nut (Mu)2)of property class 5-2: Hexagon head bolt DIN 7990 M16 50 + 3 Mu 4.6 tZn A.3 Mass increase for bolts with extended end The mass increase for bolts with extended end is given in Table A.1. Table A.1 Bolt mass increase Thread size (d) M12 M16
