1、August 2013 Translation by DIN-Sprachendienst.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
2、21.060.20!%+G+“2083608www.din.deDDIN 986Prevailing torque type hexagon domed cap nuts with non-metallic insert,English translation of DIN 986:2013-08Sechskant-Hutmuttern mit Klemmteil, mit nichtmetallischem Einsatz,Englische bersetzung von DIN 986:2013-08crous auto-freins hexagonaux borgnes callotte
3、s avec insert non-metallique,Traduction anglaise de DIN 986:2013-08SupersedesDIN 986:2000-10www.beuth.deDocument comprises 9 pagesIn case of doubt, the German-language original shall be considered authoritative.01.14 DIN 986:2013-08 2 A comma is used as the decimal marker. Contents Page Foreword . 3
4、 1 Scope . 4 2 Normative references . 4 3 Dimensions 4 4 Technical delivery conditions . 7 5 Masses . 8 6 Designation . 8 7 Marking 8 Bibliography . 9 DIN 986:2013-08 3 Foreword This standard has been prepared by Working Committee NA 067-00-03 AA Verbindungselemente mit metrischem Innengewinde of th
5、e Normenausschuss Mechanische Verbindungselemente (FMV) (Fasteners Standards Committee). The DIN 4000-161-1 tabular layout of article characteristics applies to prevailing torque type hexagon domed cap nuts. Amendments This standard differs from DIN 986:2000-10 as follows: a) normative references ha
6、ve been updated; b) symbols have been changed from d1to D as specified in DIN ISO 965-1; c) in Table 1 decimal places have been simplified for the appropriate dimension; d) technical delivery conditions of Table 2 have been brought into line with DIN EN ISO 898-2 and DIN EN ISO 2320. Previous editio
7、ns DIN 986: 1951-07, 1956-05, 1960-10, 1963-11, 1977-09, 1987-06, 2000-02, 2000-10 DIN 986:2013-08 4 1 Scope This standard applies to prevailing torque type hexagon domed cap nuts with non-metallic insert, metric coarse and fine pitch threads with nominal thread diameters of 4 mm to 20 mm in product
8、 class A (up to 16 mm nominal thread diameter) and product class B (for nominal thread diameter of 20 mm). 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 editio
9、n cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 267-2, Fasteners Technical delivery conditions Design and dimensional accuracy DIN EN ISO 898-2, Mechanical properties of fasteners made of carbon steel and alloy steel Part
10、 2: Nuts with specified property classes Coarse thread and fine pitch thread DIN EN ISO 2320, Prevailing torque type steel nuts Mechanical and performance properties DIN EN ISO 3269, Fasteners Acceptance inspection DIN EN ISO 4042, Fasteners Electroplated coatings DIN EN ISO 4759-1, Tolerances for f
11、asteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C DIN EN ISO 6157-2, Fasteners Surface discontinuities Part 2: Nuts DIN EN ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings DIN ISO 965-1, ISO general purpose metric screw threads Tolerances Part 1: Principle
12、s and basic data DIN ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts DIN 986:2013-08 5 3 Dimensions Dimensions see Figure 1 and Table 1. Figure 1 Prevailing torque type hexagon domed cap nuts (notation) DIN 986:2013-08 6 Table 1 Dimensions Dimensions in millimetres Thread
13、size M4 M5 M6 M8 M10 M12 M14 M16 M20 M8 1 M10 1 M12 1,5 M14 1,5 M16 1,5 M20 2 M10 1,25 M12 1,25 M20 1,5 Pa0,7 0,8 1 1,25 1,5 1,75 2 2 2,5 damax. 4,60 5,75 6,75 8,75 10,80 13,00 15,10 17,30 21,60 min. 4,00 5,00 6,00 8,00 10,00 12,00 14,00 16,00 20,00 dwmin. 5,90 6,90 8,90 11,60 14,60 16,60 19,60 22,5
14、0 27,70 e min. 7,66 8,79 11,05 14,38 17,77 20,03 23,35 26,75 32,95 h1Nominal size 5,6 6 7,5 8,9 10,5 13,5 15,5 16,5 21 max. 5,85 6,25 7,85 9,25 10,90 13,90 15,90 16,90 21,50 min. 5,35 5,75 7,15 8,55 10,10 13,10 15,10 16,10 20,50 h2Nominal size 9,6 10,5 12 14 18,1 22,5 26,4 27,5 35 max. 9,90 10,85 12
15、,35 14,35 18,50 22,90 26,80 27,90 35,50 min. 9,30 10,15 11,65 13,65 17,70 22,10 26,00 27,10 34,50 m min.b2,90 4,40 4,90 6,44 8,04 10,37 12,10 14,10 16,90 mwmin. 2,32 3,52 3,92 5,15 6,43 8,30 9,68 11,28 13,52 r Nominal size 2,5 3 3,5 4,6 5,8 6,8 7,8 8,8 10,8 max. 2,7 3,5 4,0 5,1 6,3 7,8 8,8 9,8 11,8
16、min. 2,3 2,5 3,0 4,1 5,3 5,8 6,8 7,8 9,8 s Nominal size = max. 7 8 10 13 16c18c21c24 30 min. 6,78 7,78 9,78 12,73 15,73 17,73 20,67 23,67 29,16 aP is the pitch of coarse thread as in DIN ISO 965-1. bAlso the minimum thread height. cThe width across flats shall be included in the designation (see Cla
17、use 5). DIN 986:2013-08 7 4 Technical delivery conditions See Table 2. Table 2 Technical delivery conditions Material Steel Insert Non-ferrous metals, e.g. polyamide General requirements Standard DIN ISO 8992 Thread Tolerance class 6HaStandard DIN ISO 965-1 Mechanical propertiesbProperty class/ mate
18、rial D 16 mm: B Standard DIN EN ISO 4759-1 Surface finishing As processed DIN EN ISO 4042 applies with regard to electroplating. DIN EN ISO 10683 applies with regard to zinc flake coatings. DIN 267-2 applies with regard to surface roughness. Surface condition DIN EN ISO 6157-2 applies with regard to
19、 limit values for surface discontinuities. Acceptance inspection DIN EN ISO 3269 applies with regard to acceptance inspection. aSee DIN EN ISO 2320. bWhere nuts are to be made of other material or comply with other property classes, these shall be selected based on the relevant standard DIN EN ISO 8
20、98-2. cFor nuts with fine pitch thread only. NOTE The thread tolerance class 6H applies for nuts with or without surface protection. Depending on the coating thickness required (e.g. if an electroplated coating as specified in DIN EN ISO 4042 is to be applied), it may be necessary to select an inter
21、ference so that the zero line can be reached. A large interference might impair the resistance of the bolt/nut assembly to stripping. DIN 986:2013-08 8 5 Masses The values of mass given in Table 3 are for guidance only. Table 3 Masses Thread (D) M4 M5 M6 M8 M10 M12 M14 M16 M20 Mass (7,85 kg/dm3) kg
22、per 1 000 units 1,4 1,55 3,3 5,3 10,1 18,3 26,1 37,1 111 Approximately the same masses may be assumed for nuts with fine pitch thread. 6 Designation Designation of a prevailing torque type hexagon domed cap nuts with non-metallic insert, M8 thread and strength class 5: Domed cap nut DIN 986 M8 5 The
23、 designation of sizes M10, M12 and M14 nuts shall also include the width across flats (SW), e.g. SW18 for M12: Domed cap nut DIN 986 M12 SW18 5 7 Marking Hexagon domed cap nuts shall be marked as specified in DIN EN ISO 898-2. DIN 986:2013-08 9 Bibliography DIN 4000-161, Tabular layout of product properties Part 161: Fasteners with internal thread
