1、CEN *PREN*3750 93 M 3404589 0045b58 53T M i AECMA STANDARD NORME AECMA AECMA NORM prEN 3750 Edition P 1 January 1993 EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AEROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 CORR
2、IGENDUM 1993 - 05 - 10 ENGLISH VERSION Aerospace series Nuts, anchor, self-locking, fixed, 90 corner, reduced series, with counterbore, in heat resisting steel, Mos2 lubricated Classification : 1 1 O0 MPa (at ambient temperature) / 31 5 OC Srie arospatiale Luft- und Raumfahrt crous river, freinage i
3、nterne, fixes, dangle 90, srie rduite, en acier rsistant chaud, lubrifis MoS2 ( temprature ambiante) / 315 OC Annietmuttem. selbstsichernd, einseitiger verkrzter 90 Eckflansch, avec chambrage, mit zylindrischer Aussenkung, aus hochwarmfestem Stahl, MoS2-geschmiert (bei Raumtemperatur) / 315 OC Class
4、ification : 1 100 MPa Klasse : 1 100 MPa Replace page 3 of the previous rdition by the attached page 3 modified as follows : Footnote 1) is changed to : Corresponds to strength class of the associated bolt, the 100 per cent load of which it is able to withstand, when tested at ambient temperature, w
5、ithout breaking or cracking. Note : prEN 3750, Edition P I, January 1993, has been distributed by circular AECMABNAE no 55383 dated 1993-01-27 Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOUUNEAUX CEDEX I C3 Chairman I Edition a
6、pproved for publication I Comments should be sent within six months after the date of Dublication to AECMA Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE 199341 -29 Mr. Arena I I aecma 199 COPYRIGHT Association Europeene Des Constructeurs de Materiel Aerospace
7、Licensed by Information Handling Services- CEN PREN*3750 93 3404589 0040067 5T0 A. E. C. M. A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM prEN 3750 Edition P 1 January 1993 DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATERIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138
8、Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : Descriptors ENGLISH VERSION Aerospace series Nuts., anchor , self -1oc king , fixed, 90 corner, reduced series, with counterbore, in heat resisting steel, Mos2 lubricated Classification : 1 100 MPa (at ambient temperature) / 315 OC Srie arospatia
9、le Luft- und Raumfahrt crous river, freinage interne, fixes, dangle 90, srie rduite, en acier rsistant chaud, lubrifis Mos2 Classification : 1 100 MPa ( temprature ambiante) I 31 5 OC Annietmuttern, selbstsichernd, einseitiger verkrzter 90 Eckflansch, avec chambrage, mit zylindrischer Aussenkung, au
10、s hochwarmfestem Stahl, Mos2-geschmiert Klasse : 1 100 MPa (bei Raumtemperatur) I315 OC This “Aerospace Series“ pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs of AECMA-Memb
11、ers. It has been technically approved by the experts of the concerned Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, wit
12、hout re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre INPS) 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 final vote.
13、Nota - Exira copies can be supplied by B.NJ4.E. - Technopolis 54 - 199, rue JeanJacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX Edition approved for publication -rCommentsshould be sent within six months I after the date of publication decision 1993-01-29 A.E.C.M.A. Technopolis - 175, rue Jean-Ja
14、cques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE C3 Chairman Mr. ARENA 0 aecma 1993 COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCEN PRENa375 93 3404589 004ObA 437 prEN 3750 Page 3 1 scope This standard specifies the characte
15、ristics of 90 corner, reduced series, counterbored fixed anchor nuts, with a self-locking feature achieved by forming the upper portion out-of-round, in heat resisting steel, Mos2 lubricated. Classification : 1 100 MPa 1 I315 OC 2, 2 Normative references IS0 5855-2 IS0 5858 IS0 8788 IS0 91 56 EN 200
16、0 EN 2398 EN 2399 EN 2424 EN 2491 EN 3042 EN 3638 EN 3639 TR 3791 Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts Aerospace - Self-locking nuts with maximum operating temperature less than or equal to 425 OC - Procurement specification Aerospace - Fasteners - Tolerances of form
17、 and position for nuts Aerospace - Nuts, anchor, self-locking, fixed, 90 corner, reduced series, with counterbore, with MJ threads, coated or uncoated, classification 1 100 MPa / 235 OC, 1 100 MPa / 31 5 OC or 1 100 MPa / 425 OC - Dimensions Aerospace series - Quality assurance - EN aerospace produc
18、ts - Approval of the quality systems of manufacturers Heat resisting steel FE-PA92-HT - Rm 2 900 MPa - Bars for machined bolts - D S 25 mm - Aerospace series 3, Heat resisting steel FE-PA92-HT - Rm 2 900 MPa - Bars for forged bolts - D S 25 mm - Aerospace series 3J Aerospace series - Identification
19、marking of standard fasteners 3, Aerospace series - Molybdenum disulphide dry lubricants - Coating methods 4, Aerospace series - Quality assurance - EN aerospace products - Qualification procedure Aerospace series - Heat resisting steel FE-PA92HT - Solution treated - Sheet and strip - a3mm4) Aerospa
20、ce series - Heat resisting steel FE-PA92HT cold worked and softened - Bars and wires for continuous cold forging or extrusion of fasteners - 3 mm ID S 30 mm - 900 MPa I Rm I 1 100 MPa 4, Aerospace series - Materials for all metal self-locking nuts and thin wall inserts of temperature classes I425 OC
21、 1) The strength class of the nut corresponds to the minimum stress which the nut is able to withstand, at ambient temperature, without breaking or cracking. 2) Maximum temperature that the nut is able to withstand, without permanent alteration to its original characteristics, after ambient temperat
22、ure has been restored. The maximum temperature is conditioned by the surface treatment. 3) In preparation at the date of publication of this standard 4) Published as AECMA standard at the date of publication of this standard 5) Published as AECMA technical report at the date of publication of this s
23、tandard Previous page is blank COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCEN PRENr3750 93 = 3404589 0040069 373 prEN 3750 Page 4 3 Required characteristics 3.1 See figure 1 and table I. Dimensions and tolerances are : in conformit
24、y with IS0 91 56, expressed in millimetres and apply before Mos2 lubrication. Form and position tolerances shall be in conformity with IS0 8788 and those specified in table 1. 3.2 Materials EN 2398, EN 2399, EN 3638, EN 3639 or TR 3791 Configuration - Dimensions - Masses 3.3 Surface treatment EN 249
25、1, thickness not specified COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCEN PRENx3750 93 3404589 0040070 095 Diameter Thread l) E F G H J2) K L M N 3, R Mass code kgll O00 pieces min. min. max. Max. max. max. max. aux. approx. 040 MJ
26、40,7-4H6H 6 8,5 4,4 2,2 6,2 4 12,7 5,8 1 2,5 1,0 050 MJSxO,8-4H6H 7 9,9 5,5 2,4 7,3 4,5 14,2 6,9 1,3 060 MJ6xl-4H5H 8 11,3 6,5 2,7 8,7 5 16,2 8,l 1,2 3 1,8 1) In accordance with IS0 5855-2. In the self-locking zone, the tolerances apply before forming out-of- round. 2) Is to sharp corners (chamfered
27、) or point of tangency (radiused). 31 Is applicable at the rivet hole location. - prEN 3750 Page 5 Remove sharp edges 0,l to 0,4 1)These values in micrometres apply before surface treatment. The values do not apply to threads and sheared edges the surface texture of which will be achieved by usual m
28、anufacturing methods. 2)Tooling marks are permitted in this area. 3) Details of form not stated are at the manufacturers option. Figure 1 3, Table 1 COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCEN PRENa3750 93 M 3404589 004007L T2L
29、M prEN 3750 Page 6 4 Designation EXAMPLE : Description block Identity block EN3 7 5 0-060 Number of this standard Diameter code (see table 1) NOTE : If necessary, the originator code 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style N. See figure 1 6 Technical specification IS0 5858 except for : - Approval of manufacturers : see EN 2000 ; - Qualification of products : see EN 3042. COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling Services
