1、November 2016 English price group 9No 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!%dr“2655979www.din.deD
2、IN 34800Bolts and screws with external hexalobular driving feature with small flange,English translation of DIN 34800:2016-11Schrauben mit Auensechsrund mit kleinem Flansch,Englische bersetzung von DIN 34800:2016-11Vis tte six lobes externes embase cylindro-tronconique petite,Traduction anglaise de
3、DIN 34800:2016-11SupersedesDIN 34800:2005-09www.beuth.deDocument comprises 13 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.06.17 DIN 34800:2016-11 2 A comma is used as the decimal marker. Contents Page Foreword . 3 1 Scope 4
4、 2 Normative references 4 3 Dimensions 5 3.1 General 5 3.2 Normal shank bolt dimensions: Type C . 5 3.3 Dimensions of bolts with reduced shank or threaded up to the head: Type B . 6 4 Technical delivery conditions . 10 5 Designation 10 Annex A (normative) Gauging of hexalobular head . 11 A.1 General
5、 11 A.2 Checking of head height 11 A.3 Checking of diameter (dt) . 11 A.4 Checking head form 11 DIN 34800:2016-11 3 Foreword This standard has been prepared by Working Committee NA 067-00-02 AA Verbindungselemente mit metrischem Auengewinde of DIN-Normenausschuss Mechanische Verbindungselemente (DIN
6、 Standards Committee Fasteners). The DIN 4000-160-1 tabular layout of product properties applies to screws covered in this standard. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for
7、identifying any or all such patent rights. Amendments This standard differs from DIN 34800:2005-09 as follows: a) the standard has been editorially revised; b) normative references have been updated; c) the diameter of the choke has been dimensioned in Figure 1 and listed in Table 1; d) the restrict
8、ion on the length of 1,5d for the shank below the flange for screws with a reduced shank and where l 10d has been relaxed; e) in Table 1, the thread dimensions have been corrected from M18 1,25 to M18 1,5. Previous editions DIN 34800: 1999-12, 2000-04, 2005-09 DIN 34800:2016-11 4 1 Scope This standa
9、rd specifies dimensions and technical delivery conditions for M4 to M20 coarse and fine pitch thread hexalobular head bolts with small flange, of property classes 8.8 and 10.9 for steel and A2-70 and A4-70 for stainless steel, in product grades A and B. Specifications for gauging the hexalobular hea
10、d are given in Annex A. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced docum
11、ent (including any amendments) applies. DIN 962, Bolts, screws, studs and nuts Designation, types and finishes DIN 4000-160, Tabular layout of product properties Part 160: Fasteners with external thread DIN EN 26157-3, Fasteners Surface discontinuities Bolts, screws and studs subject to special requ
12、irements DIN EN ISO 225, Fasteners Bolts, screws, studs and nuts Symbols and descriptions of dimensions DIN EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs with specified property classes Coarse thread and fine pitch thread DIN EN
13、 ISO 3269, Fasteners Acceptance inspection DIN EN ISO 3506-1, Mechanical properties of corrosion-resistant stainless steel fasteners Part 1: Bolts, screws and studs DIN EN ISO 4042, Fasteners Electroplated coatings DIN EN ISO 4753, Fasteners Ends of parts with external ISO metric thread DIN EN ISO 4
14、759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C DIN EN ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings DIN EN ISO 16048, Passivation of corrosion-resistant stainless-steel fasteners DIN ISO 965-1, ISO general purpose metric screw
15、threads Tolerances Part 1: Principles and basic data DIN ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts DIN 34800:2016-11 5 3 Dimensions 3.1 General See Figures 1 and 2 and Table 1. Symbols and their descriptions are specified in DIN EN ISO 225. 3.2 Normal shank bolt dime
16、nsions: Type C (notation) Key dchDiameter of the choke (auxiliary dimension) a End chamfered (CH) as in DIN EN ISO 4753 b Length of incomplete thread u 2P c Pressing contour d Design of bottom edge of flange at manufacturers discretion e Reference line for dwf Auxiliary dimension Figure 1 Normal sha
17、nk bolt: Type C (notation) DIN 34800:2016-11 6 3.3 Dimensions of bolts with reduced shank or threaded nearly up to the head: Type B (notation) For lengths l 10d, the shank below the flange can be unthreaded. a) For lengths l 10d b) For lengths l 10 d or 150 mmb: B Standard DIN EN ISO 4759-1 Surface
18、finish Coating As processed. Plain DIN EN ISO 4042 applies with regard to electroplating. Passivation as in DIN EN ISO 16048 DIN EN ISO 10683 applies with regard to non-electrolytically applied zinc flake coatings. Surface condition DIN EN 26157-3 applies with regard to limits for surface discontinu
19、ities. Acceptance inspection DIN EN ISO 3269 aDepending on the selected coating system, another tolerance position prior to the application of the coating may be necessary, see DIN EN ISO 4042 and DIN EN ISO 10683, for example. bThe smaller value shall apply. 5 Designation Designation of an M10 hexa
20、lobular head bolt with small flange, type C (C), with a length l = 110 mm of property class 8.8: Hexalobular head bolt DIN 34800 C M10 110 8.8 Designation of an M10 hexalobular head bolt with small flange, type B (B), with a length l = 110 mm of property class 8.8: Hexalobular head bolt DIN 34800 B
21、M10 110 8.8 See DIN 962 for supplementary order designations for special screw types and finishes. DIN 34800:2016-11 11 Annex A (normative) Gauging of hexalobular head A.1 General The bolt head is to be gauged using GO and NOT GO gauges as in Figure A.1 a) with dimensions according to Figure A.2 and
22、 Table A.1. A.2 Checking of head height Fit head into gauge section A and check that the top of the bolt head is either level with the gauge surface or protrudes beyond it (see Figure A.1 b). If so, the head height is true to gauge. A.3 Checking of diameter (dt) Check whether the hexalobular part of
23、 the head can be fully introduced into gauge section B (see Figure A.1c). If so, diameter dtis true to gauge. A.4 Checking head form Fit head into gauge section C and check whether the top of the bolt head protrudes beyond the gauge surface (see Figure A.1 d). If so, the head is not true to gauge. D
24、IN 34800:2016-11 12 Key 1 Gauge section A 2 Gauge section B 3 Gauge section C a) Gauge for gauging hexalobular head Incorrect Correct b) Gauging with section A c) Gauging with section B d) Gauging with section C Figure A.1 Gauging hexalobular head DIN 34800:2016-11 13 Figure A.2 Gauge dimensions Tab
25、le A.1 Gauge dimensions Dimensions in millimetres Head size A AA B K T R S X J E H +0,0080,003+0,0080,003+0,0080,008+0,1270 0 0,0250 0,005+0,380,38+0,1270,127+0,250,25+0,250 +0,380,38E 5 4,648 4,242 3,353 0,940 1,168 0,902 1,75 11,65 6,91 2,77 3,18 E 6 5,613 5,283 3,988 0,991 1,372 1,257 2,59 12,17
26、9,30 3,96 3,18 E 8 7,366 6,883 5,258 1,448 1,600 1,613 3,02 16,14 11,61 4,75 6,35 E 10 9,271 8,839 6,756 1,829 2,007 2,324 3,91 17,12 15,72 6,35 6,35 E 12 11,024 10,312 7,874 2,286 2,540 2,400 4,62 20,44 17,27 7,14 6,35 E 14 12,751 11,862 9,169 3,023 2,692 2,629 5,18 24,98 19,30 7,92 9,53 E 18 16,485 15,291 11,836 3,734 3,658 3,366 6,05 33,05 24,05 9,53 9,53 E 20 18,263 16,891 13,157 4,089 4,115 3,632 7,37 35,43 27,00 11,10 9,53 E 24 21,946 20,396 15,697 5,639 5,359 4,724 9,50 38,77 33,99 14,27 9,53
