1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 1995-05-31 prEN 2883 Edition P 1 May 1995 Comments should be sent within six months after the date of publication to AECMA Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE C 3 Chairman M. Are
2、na DITE 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 ENGLISH VERSION Aerospace series Nuts, hexagonal, self-locking, with counterbore and captive washer, in heat resisting
3、steel, Mos2 lubricated Classification : 1 I O0 MPa (at ambient temperature) / 31 5 OC Srie arospatiale Luft- und Raumfahrt crous hexagonaux, freinage interne, avec chambrage et rondelle captive, en acier rsistant chaud, lubrifis Mos2 ( temprature ambiante) 1315 OC Sechskantmuttern, selbstsichernd, m
4、it zylindrischer Aussenkung und Brdelscheibe, aus hochwarmfestem Stahl, Mos2-geschmiert (bei Raumtemperatur) I 315 OC Classification : 1 100 MPa Klasse : 1 100 MPa This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matr
5、iel Arospatial). It is published on green paper for the needs of AECMA-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 change
6、d to an extent that interchangeability is affected, physically or functionally, 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
7、 European Standard to CEN (European Committee for Standardization) for formal vote. COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesSTD*AECMA PREN 2883-ENGL 1995 = 10123LL 0012102 7bL M Page 3 prEN 2883 : 1995 1 Scope This standard spec
8、ifies the characteristics of self-locking hexagonal nuts, with counterbore and captive washer, in heat resisting steel, MOS, lubricated. Classification : 1 100 MPa I315 OC 2 Normative references IS0 5855-2 Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts IS0 5858 IS0 8538 IS0 87
9、88 EN 2000 EN 2424 EN 2491 EN 2516 EN 3042 TR 3791 Aerospace - Self-locking nuts with maximum operating temperature S 425 OC - Procurement specification Aerospace - Self -locking hexagon nuts with counterbore and captive washer, classification 1 100 MPa /235 OC Aerospace - Fasteners - Tolerances of
10、form and position for nuts Aerospace series - Quality assurance - EN aerospace products - Approval of the quality system of manufacturers Aerospace series - Marking of aerospace products Aerospace series - Molybdenum disulphide dry lubricants - Coating methods 3, Aerospace series - Passivation of co
11、rrosion resistant steels and decontamination of nickel base alloys 3) Aerospace series - Quality assurance - EN aerospace products - Qualification procedure Aerospace series - Materials for all metal self-locking nuts and thin wall inserts of temperature classes S 425 OC 4, 1 i Corresponds to the mi
12、nimum tensile stress which the nut is able to withstand at ambient temperature 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 characterisitcs, after ambient temper
13、ature 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 Technical Report at the date of publication of this standard Previous page is blank COPYRIGHT Association Europeene Des Constr
14、ucteurs de Materiel AerospaceLicensed by Information Handling ServicesSTD-AECMA PREN 2883-ENGL 1775 1012311 0012103 bTB Page 4 prEN 2883 : 1995 3 Required characteristics 3.1 See figure 1 and table 1. Dimensions and tolerances are : in conformity with IS0 8538, expressed in millimetres and apply bef
15、ore Mos2 lubrication. Configuration - Dimensions - Masses Detail 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 Nut : threaded element only, EN 2491 , thickness not specified Washer : EN 251 6, process clas
16、s appropriate to the material COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesPage 5 prEN 2883 : 1995 Diameter code 030 040 y( tv/)” Remove sharp edges 0,l to 0,4 Thread E2 F 2) G H J K L M N P Mass3) min. max. max. min. min. max. min.
17、min. min. MJ30,5-4H6H 4,2 4 6,7 4,6 3,4 5,2 3,8 1,2 1,6 0,4 MJ40.7-4H6H 5,3 5 8,4 6,2 4,4 6,4 4,8 1,5 2,2 0,85 OA - x-x Washer shall be free to rotate on the nut Form out-of-round in H 1) These values in micrometres apply before surface treatment. They do not apply to threads and sheared edges the s
18、urface texture of which will be as achieved by usual manufacturing methods. 2) Bearing surface diameter of the washer 3) Wrench pad engagment Figure 1 Table 1 COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesSTD-AECMA PREN 2883-ENGL 2795
19、 LOL23Ll 0012105 Y70 Description block Page 6 prEN 2883 : 1995 Identity block 4 Designation EXAMPLE : NOTE : If necessary, the 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
