1、December 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).IC
2、S 21.060.20!%+M“2089642www.din.deDDIN 928Square weld nuts,English translation of DIN 928:2013-12Vierkant-Schweimuttern,Englische bersetzung von DIN 928:2013-12crous carrs souder,Traduction anglaise de DIN 928:2013-12SupersedesDIN 928:2013-05www.beuth.deDocument comprises 10 pagesIn case of doubt, th
3、e German-language original shall be considered authoritative.01.14 DIN 928:2013-12 2 A comma is used as the decimal marker. Contents Page Foreword . 3 1 Scope . 4 2 Normative references . 4 3 Dimensions 5 4 Technical delivery conditions . 7 5 Designation . 8 6 Marking 8 7 Representation in drawings
4、. 8 8 Connecting dimensions . 8 Bibliography . 10 DIN 928:2013-12 3 Foreword This standard has been prepared by Working Committee NA 067-00-03 AA Verbindungselemente mit metrischem Innengewinde of the Normenausschuss Mechanische Verbindungselemente (Fasteners Stand-ards Committee). The DIN 928:1970-
5、05 edition assigned the property class 8 to square weld nuts, adding “weldable”. Since then, proof loads for nuts have been increased and new nut heights specified in international (and European) specifications (see also DIN EN ISO 898-2). Neither in this nor in the previous revision of this standar
6、d did it seem advisable to increase the height of weld nuts by harmonizing it with the calculation basis for nuts with full loadability, since weld nut mounting is largely automated. Changing nut dimensions would have caused major difficulties which would not have been outweighed by a slightly highe
7、r resistance to stripping. Therefore, this latest edition of this standard leaves nut dimensions unchanged, without specifying any property class. Instead, it only specifies steel with a maximum carbon content of 0,25 % and relevant proof loads. The proof loads of weld nuts specified in this standar
8、d are deemed sufficient to form fully loadable connections with bolts of a property class 8.8. Weld nuts with a higher loadability are specified in DIN EN ISO 21670. The DIN 4000-161-5 tabular layout of product properties applies to weld nuts covered by this standard. Attention is drawn to the possi
9、bility that some of the elements of this document may be the subject of patent rights. DIN shall not be held responsible for identifying any or all such patent rights. Amendments This standard differs from DIN 928:2000-01 as follows: a) normative references have been updated; b) in Table 1 and Table
10、 4, the number of positions after the decimal comma has been harmonized; c) according to DIN ISO 965-1, symbol d1has been changed to D; d) symbols d2to d5have been changed to d1to d4; e) in Table 1, the value of m has been corrected for M14 and M14 1,5; f) Table 2 replaces 4.1 to 4.3, 4.5 and 4.6; g
11、) the standard has been revised in form and content. DIN 928:2013-05 contained an error that has been corrected as follows: a) In Table 1, dimension e in the last line (M16) has been corrected from 23 mm to 32 mm. Previous editions DIN 928: 1970-05, 1983-08, 1998-02, 2000-01, 2013-05 DIN 928:2013-12
12、 4 1 Scope This document specifies requirements for square weld nuts with coarse metric threads from sizes M4 to M16 and with fine pitch metric threads from 8 mm to 16 mm in product grade A. According to DIN EN ISO 898-1, weld nuts specified in this standard are suitable for connection with bolts of
13、 property class 8.8. 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 document
14、 (including any amendments) applies. DIN 13-1, ISO general purpose metric screw threads Part 1: Nominal sizes for coarse pitch threads Nominal diameter from 1 mm to 68 mm DIN 13-5, ISO general purpose metric screw threads Part 5: Nominal sizes for 1 mm and 1,25 mm fine pitch threads Nominal diameter
15、 from 7,5 mm to 200 mm DIN 13-6, ISO general purpose metric screw threads Part 6: Nominal sizes for 1,5 mm fine pitch threads Nominal diameter from 12 mm to 300 mm DIN 267-2, Fasteners Technical delivery conditions Design and dimensional accuracy DIN 929, Hexagon weld nuts DIN EN ISO 898-1, Mechanic
16、al 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 ISO 898-2, Mechanical properties of fasteners made of carbon steel and alloy steel Part 2: Nuts with specified property classes C
17、oarse thread and fine pitch thread DIN EN ISO 3269, Fasteners Acceptance inspection DIN EN ISO 4042, Fasteners Electroplated coatings DIN EN ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C DIN ISO 965-1, ISO general purpose metric screw threads To
18、lerances Part 1: Principles and basic data DIN ISO 8992, Fasteners General requirements for bolts, screws, studs and nuts ASME B 1.1, Unified Inch Screw Threads (UN and UNR Thread Form)1)1 ) Obtainable from Beuth Verlag GmbH (Foreign Standards Service), 10772 Berlin, Germany. DIN 928:2013-12 5 3 Dim
19、ensions Square weld nuts do not need to be designed as shown in Figure 1, however, their dimensions shall be as specified in Table 1. Dimensions in millimetres Figure 1 Dimensions (notation) DIN 928:2013-12 6 Table 1 Dimensions Dimensions in millimetres Thread size B d1d2d3e h1D D PaLimit devia- tio
20、ns H13 max. min. min. 0,1 M4 0,80 0,15 5,00 4,20 6,40 9 0,60 M5 1,00 6,00 5,25 8,20 12 0,80 M6 1,20 7,50 6,30 9,10 13 0,80 M8 M8 1 1,50 10,00 8,40 12,80 18 1,00 M10 M10 1,25 M10 1 1,80 0,20 12,50 10,50 15,60 22 1,20 7/16-20 UNF-2Bb1,80 12,50 11,70 15,60 22 1,20 7/16-20 UNF-2Bb2,00 13,50 11,70 17,40
21、25 1,40 M12 M12 1,25 M12 1,5 2,00 13,50 12,60 17,40 25 1,40 (M14) (M14 1,5) 2,50 16,80 14,70 20,40 28 1,40 (M16) (M16 1,5) 2,50 18,80 16,80 22,40 32 1,60 Thread size h2m s Mass (7,85 kg/dm3) kg per 1 000 units D D Pamin. max. h14 h14 M4 0,40 1,30 3,50 7 0,81 M5 0,60 1,50 4,20 9 1,70 M6 0,70 1,80 5,0
22、0 10 2,40 M8 M8 1 1,10 2,00 6,50 14 6,50 M10 M10 1,25 M10 1 1,25 2,20 8,00 17 11,30 7/16-20 UNF-2Bb1,25 2,20 9,00 17 12,50 7/16-20 UNF-2Bb1,75 3,00 9,00 19 16,50 M12 M12 1,25 M12 1,5 1,75 3,00 9,50 19 16,50 (M14) (M14 1,5) 1,75 3,20 11,00 22 26,70 (M16) (M16 1,5) 2,00 4,00 13,00 24 35,80 Bracketed s
23、izes should be avoided if possible. aP is the thread pitch. b According to ASME B 1.1; only for the fitting of safety belts in motor vehicles. DIN 928:2013-12 7 4 Technical delivery conditions See Table 2. Table 2 Technical delivery conditions Material Steel (St) with a maximum carbon mass of 0,25 %
24、aGeneral requirements Standard DIN ISO 8992 Thread size Tolerance class 6G Standard DIN 13-1, DIN 13-5, DIN 13-6, DIN ISO 965-1 Mechanical properties Proof loads See Table 3. Proof load test DIN EN ISO 898-2 Limit deviations, geometrical tolerances Product grade A Standard DIN EN ISO 4759-1, DIN 267
25、-2 Surface finish Coating Plain DIN EN ISO 4042 applies with regard to electroplating. Plain weld nuts may already be affected by corrosion during storage or transportation. It is the manufacturers responsibility to take protective measures against corrosion during transportation without impairing n
26、ut weldability. Acceptance inspection DIN EN ISO 3269 applies with regard to acceptance inspection. aOther steel qualities shall be subject to agreement. If the proof load test is carried out according to DIN EN ISO 898-2, the loads given in Table 3 apply. In case of dispute, welding projections sha
27、ll be removed prior to testing. Table 3 Proof loads Coarse thread D Proof load in N Fine pitch thread D P Proof load in N M4 6 800 M5 11 000 M6 15 500 M8 28 300 M8 1 30 200 M10 44 800 M10 1 50 200 M10 1,25 47 800 7/16-20 UNF-2B 53 600 M12 65 300 M12 1,25 72 100 M12 1,5 68 200 M14 89 700 M14 1,5 97 5
28、00 M16 123 000 M16 1,5 132 000 DIN 928:2013-12 8 5 Designation Designation of an M10 square weld nut, made of steel (St): Weld nut DIN 928 M10 St For square weld nuts with UNF thread the relevant width across flats is to be added to the designation. Designation of a square weld nut with 7/16-20 UNF-
29、2B thread, with a width across flats of 17 mm (SW17), made of steel (St): Weld nut DIN 928 7/16-20 UNF-2B SW17 St 6 Marking Square weld nuts of thread sizes M5 and above are to be marked with the manufacturers symbol by indenture to a spot at the discretion of the manufacturer. 7 Representation in d
30、rawings See Table 2. Figure 2 Representation in drawings 8 Connecting dimensions See Figure 3 and Table 4. Figure 3 Connecting dimensions (Nut not welded on) DIN 928:2013-12 9 Table 4 Connecting dimensions Dimensions in millimetres Thread size as in Table 1 Sheet thickness a Hole diameter d4aD D P m
31、in. max. H11 M4 0,75 1,50 6,0 M5 0,88 2,00 7,0 M6 0,88 2,50 8,0 M8 M8 1 1,00 3,00 10,5 M10 M10 1,25 M10 1 1,25 4,00 12,5 7/16-20 UNF-2B 1,25 4,00 13,5 M12 M12 1,25 M12 1,5 1,50 5,00 14,8 M14 M14 1,5 2,00 6,00 16,8 M16 M16 1,5 2,00 6,00 18,8 aTo ensure interchangeability, the hole diameters correspon
32、d to those of hexagon weld nuts as specified in DIN 929. They are, however, not design requirements, and therefore, other hole diameters are permitted. DIN 928:2013-12 10 Bibliography DIN 4000-161, Tabular layout of product properties Part 161: Fasteners with internal thread DIN EN ISO 21670, Hexagon weld nuts with flange
