1、AECMA PREN2L58-02 77 LOL23Ll 0002325 5 Approved by COMITE DE NORMALISATION of A.E.C.M.A. 1977.06-24 A.E.C.M.A. STANDARD NORME A.E.C.M.A. A.E.C.M.A. NORM r- The equivalent versions in French and - be supplied by B.N.A.E., 8, rue Moreau-Vauthier 92100 BOULOGNE-BILLANCOURT - FRANCE. DRAFT prEN2158-2 Ed
2、ition 1 January 1979 ENGLISH VERSION MJ THREADS PART 2 - SELECTION OF NOMINAL DIAMETERS - PITCHES - TOLERANCES AEROSPACE SERIES FILETAGES MJ MJ-GEWI NDE PARTIE 2 -SELECTION DIAMTRES NOMINAUX - TEIL 2 - NENNDURCHMESSER - PAS -TOLERANCES STEIGUNGSAUSWAHL - TOLERANZEN SERI E AGROSPATI AL E LUFT-UND RAU
3、MFAHRT The text of this standad, which exists in three equivalent versions (English, French, German) has been drawn up under the retponsability of AECMA (Association Eumpenne des Constructeurs de Matriel Arospatial) and has been circulated to Official Services, Any reservations expressed by Official
4、 Services and not resolverJ in this isue, have been incorpomted in the history sheet which has accompanid this prEN to GEN. it is published on yellow paper as a draft European Standard intended to receive, under the same presentation and according to its own rules, the approval of GEN (European Comm
5、ittee for Standardization). . prEN2158-2 Page 2 FOREWORD This standard is part 2 of EN2158 defining metric J threads aerospace series. The complete series is made up as follows : EN2158-1 - bU threads - Part 1 - Basic profile EN2158-2 - MJ threads - Part 2 - Selection of nominal diame- ters - Pitche
6、s - Tolerances EN2158-3 - MJ threads - Part 3 - Tolerances and limiting dimensions. CONTENTS 1 SCOPE AND FIELD OF APPLICATION 2 REFERENCES 3 SELECTION 4 DESIGNATION 1 AECMA PREN2L58-02 77 m 10LZ31L 0002327 7 m Pitch O ,35 0,40 O ,45 O ,50 0,60 0.70 0,80 1 ,o0 1 2 Nominal diameters 7 8 10 12 14 16 18
7、 20 . -4 Nominal diameters 22 24 27 30 33 36 39 prEN2 158-2 Page Pitch 1,50 2 too 2 ,o0 2 ,o0 2 ,o0 2 ,o0 2 ,o0 DRAFT EUROPEAN STANDARD AEROSPACE SERIES p r EN2 15 8 -2 Bolt d : 6h d2 : 4h MJ THREADS PART 2 - SELECTION OF NOMINAL DIAMETERS- PITCHES - TOLERANCES Nut nominal D D, 4H SCOPE AND FIELD OF
8、 APPLICATION This standard specifies the selection of nominal diameters, pitches and tolerance classes for MJ threads for use in aerospace construction. REF ERENCES IS0 965/1 - 1973, IS0 general purpose metric screw threads - Tolerances - EN2 158-1, MJ threads - Part 1 - Basic profile EN2158-3, FU t
9、hreads - Part 3 - Tolerances and limiting dimensions SELECTION 3.1 Nominal diameters, pitches, tolerances, applicable to bolts and nuts Principles and basic data This information is given in table 1 for the nominal diameters and the pitches, in table 2 for the classes of tolerance. Nominal diameters TABLE 1 Dimensions in millimetres Pitch 1,50 1,50 1,50 1,50 TABLE 2 Dimensions in millimetres 3.2 The tolerances given in table 2 are defined in IS0 96511. DESIGNATION Fr See EN2 158-3. I I
