1、AECMA PREN*3834 95 m l10123Ll 0009750 342 M AECMA STANDARD prEN 3834 NORME AECMA Edition P 2 AECMA NORM September 1995 Edition approved for publication PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81
2、11 ICs : 49.040.20 C3 Chairman Comments should be sent within six months after the date of publication to ENGLISH VERSION Aerospace series Nuts, anchor, self-locking, floating, two lug, incremental counterbore, in corrosion resisting steel, MOS* lubricated Classification : 900 MPa (at ambient temper
3、ature) 1 315 OC Srie arospatiale Luft- und Raumfahrt crous river, freinage interne, chambrage trs profond, en acier rsistant la corrosion, lubrifis Mos2 Classification : 900 MPa ( temprature ambiante) I 31 5 OC Annietmuttern, selbstsichernd, beweglich, mit unterschiedlich tiefer zylindrischer Aussen
4、kung, aus korrosionsbestndigem Stahl, Mos2-geschmiert Klasse : 900 MPa (bei Raumtemperatur) / 315 OC flottants, double patte, beiderseitiger Flansch, This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is publ
5、ished 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 changed to an extent that interch
6、angeability 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 European Standard to CEN (
7、European Committee for Standardization) for formal vote. 1995-09-30 AECMA Gulledelle 94 B-1200 BRUXELLES M. Arena I I I aecma 199 COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling Services AECIA PRENx334 95 = LOL2311 0009752 115 = Page 3 prEN 383
8、4 : 1995 1 Scope This standard specifies the characteristics of self-locking, floating, two lug anchor nuts, with incremental counterbore, in corrosion resisting steel, Mos2 lubricated. Classification : 900 MPa 1 I315 OC 2, 2 Normative references IS0 5855-2 IS0 5858 IS0 8788 EN 2000 EN 2424 EN 2491
9、EN 3042 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 and position for nuts Aerospace series - Quality
10、assurance - EN aerospace products - Approval of the quality systems 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 Ae
11、rospace series - Materials for all metal self-locking nuts and thin wall inserts of temperature classes I425 OC 4, 1) Corresponds to the minimum 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
12、) 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 the Mos2 lubricant. 3) In preparation at the date of publication of this standard 4) Published
13、 as AECMA Technical Report at the date of publication of this standard COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling Services AECMA PRENx3834 95 LOL23LL 0009753 05L Page 4 prEN 3834 : 1995 3 Required characteristics 3.1 See figure 1 and table
14、 1. Configuration - Dimensions - Masses Dimensions and tolerances are expressed in millimetres and apt. 1 before Mos2 lubrication. Details of form not stated are at the manufacturers option. 3.2 IS0 8788 Tolerances of form and prosition 3.3 Materials TR 3791 3.4 Surface treatment EN 2491, thickness
15、not specified COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesAECMA PREN*3834 95 = 1012311 0009754 T98 = Page 5 prEN 3834 : 1995 6,3 ( 3,2 ) Remove sharp edges 0,l to 0,4 Y -Y Marking R A b Z - K Hoa t inclusive c + cr 8- X cv X (4:l 1)
16、 These values in micrometres apply before surface treatment. They do not apply to threads and sheared edges 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 Thread Counterbore E f G code A 060 1 MJ
17、6x1-4H5H 11 22 1 6,2 04 080 MJ8x1-4H5H 11 22 8,2 08 10 I 10 Radial float 4,5 1) In accordance with IS0 5855-2. In the self-locking zone the tolerances apply before forming out-of-round. 2) Measured at sharp corners (chamfered) or point of tangency (radiused) 3) Measured at the rivet hole location 4)
18、 Approximate values (kg/l O00 pieces), calculated on the basis of 7,85 kg/dm3, given for information purposes only COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesPage 6 prEN 3834 : 1995 4 Designation EXAMPLE : Description block Identit
19、y block Number of this standard Diameter code (see table 11 Counterbore 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. 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
