1、STD-AECMA PREN 37b3-ENGL 1797 3032333 00127b3 32T AECMA STANDARD NORME AECMA AECMA NORM prEN 3763 Edition P 2 April 1997 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 6-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 ICs : 49.040.20 Supersedes i
2、ssue P 1 February 1993 Descriptors : Aircraft industry, fastener, nut : fastener, hexagonal nut, self-locking nut, heat resisting steel, classification, dimension, surface treatment, screw thread, designation ENGLISH VERSION Aerospace series Nuts, hexagonal, self-locking, ball seat, in heat resistin
3、g steel, Mos2 lubricated Classification : 900 MPa (at ambient temperature) I315 OC Srie arospatiale crous hexagonaux, freinage interne, orientables, Luft- und Raumfahrt Sechskantmuttern, selbstsichernd, fr Neigungsausgleich, en acier rsistant chaud, lubrifis Mos2 Classification : 900 MPa ( tempratur
4、e ambiante) / 315 OC aus ochwarmfestem Stahl, MoS2-geschrrA Klasse : 900 MPa (bei Raumtemperatur) / 315 OC This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA
5、-Members. It has been technically approved by the experts of the concerned Technical Committee following comment by the Member countries. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or func
6、tionally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for
7、 formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAUX CEDEX Comments should be sent within six months after the date of publication to I Edition approved for publication 1997-04-30 AECMA Gulledelle 94 B-1200 BRUXE
8、LLES C3 Chairman Mr Arena aecma 1997 COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesSTDmAECMA PREN 37b3-ENGL I997 LOL23LL 00L27b4 2bb Page 3 prEN 3763 : 1997 1 Scope This standard specifies the characteristics of self-locking hexagonal
9、 nuts with ball seat in heat resisting steel, Mos2 lubricated. Classification : 900 MPa 1) / 315 OC 2) They are intended to be used with washers to EN 3764 or suitable parts, see annex A. 2 Normative references IS0 5855-2 IS0 5858 IS0 8788 EN 2000 EN 2424 EN 2491 EN 3042 EN 3764 TR 3791 Aerospace -
10、MJ threads - Part 2 : Limit dimensions for bolts and nuts Aerospace - Self-locking nuts with maximum operating temperature I 425 OC - Procurement specification Aerospace - Fasteners - Tolerances of form and position for nuts Aerospace series - Quality assurance - EN aerospace products - Approval of
11、the quality system of manufacturers Aerospace series - Marking of aerospace products Aerospace series - Molybdenum disulphide dry lubricants - Coating methods 3) Aerospace series - Quality assurance - EN aerospace products - Qualification procedure Aerospace series - Washers, concave, in heat resist
12、ing steel, passivated 4) Aerospace series - Materials for all metal self-locking nuts and thin wall inserts of temperature classes I425 OC 5) 3 Required characteristics 3.1 Configuration - Dimensions - Masses See figure 1 and table 1. Dimensions and tolerances are expressed in millimetres and apply
13、before Mos2 lubrication. Details of form not stated are at the manufacturers option. 3.2 IS0 8788 Tolerances of form and position 3.3 Materials TR 3791 3.4 Surface treatment EN 2491, thickness not specified 1) Corresponds to the minimum tensile stress which the nut is able to withstand at ambient te
14、mperature without breaking or cracking when tested with a bolt of a higher strength class. 2) Maximum temperature that the nut is able to withstand, without permanent alteration to its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by th
15、e surface treatment. 3) Published as AECMA Standard at the date of publication of this standard 4) Published as AECMA Prestandard at the date of publication of this standard 5) Published as AECMA Technical Report at the date of publication of this standard COPYRIGHT Association Europeene Des Constru
16、cteurs de Materiel AerospaceLicensed by Information Handling ServicesSTD*AECMA PREN 37b3-ENGL 1777 LOL2311 00L27b5 IT2 D Page 4 prEN 3763 : 1997 060 080 100 120 Remove sharp edges 0,l to 0,4. .I .L MJ6x1-4H5H 7,6 7 13 8,l 6,5 2,5 2,3 2,7 9 8,4 2,5 MJ8xl-4H5H 10,9 10 17 9.7 8,5 3 3,2 2,5 12,5 11,75 6
17、,5 MJ101,25-4H5H 13,2 12 h13 21 11,95 10,5 4 3,3 2.95 16 15,l 11,3 MJ121,25-4H5H 15,5 14 24 13,46 12,5 4,5 4.5 2,65 18 16,9 17.4 x-x the manufacturers discretion) IFI in this area to achieve Form out-of-round the self-locking torque requirement 2). I i Chamfer, radius or broken edge 1) These values
18、in micrometres apply before surface treatment. They do not apply to threads the surface texture of which will be as achieved by usual manufacturing methods. 2) Tooling marks are permitted in this area. Figure 1 Table 1 Diameter I code 1 Thread 1 I:i)I F2) I G I H 1 J 1 M I N 1 P 1 0“ I T /Mass3)l f
19、0.2 max. min. min. min. min. - 0.5 I I I 1-1 I I I I I I I 10.3 I 7,05 I 5,5 I 1,7 I 2 I2,05 I 8 1 7,5 I 1,7 050 MJ50,8-4H6H ! 65 ! 1 hl7l 1 1 ) In accordance with IS0 5855-2. In self-locking zone the tolerances apply before forming out-of-round. 2) These dimensions apply before forming out-of-round
20、, but finished nuts shall fit a standard socket wrench. 3) Approximate values (kgll O00 pieces), given for information puposes only COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesPage 5 prEN 3763 : 1997 4 Designation EXAMPLE : Descript
21、ion block Identity block EN3763-060 Number of this standard Diameter code (see table 1) NOTE : If necessary, the code 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style N plus diameter code. See figure 1. 6 Technical specification IS0 5858, except fo
22、r : - Approval of manufacturers : see EN 2000 ; - Qualification of products, nut and washer (EN 3764) : see EN 3042. COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesSTD*AECMA PREN 37b3-ENGL 1777 W LO1231L 00L27b7 T75 Page 6 prEN 3763 :
23、1997 050 060 ANNEX A (informative) Assembly A. 1 Dimensions See figure A. 1 and table A.1. 8,25 3,05 9,1 3,5 Figure A.l 1 O0 120 Table A.1 13,95 4,75 16,25 5,25 I max. min. Diameter code I A.2 Examples See figures A.2 and A.3. Figure A.2 Figure A.3 COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling Services
