AECMA PREN 3539-1993 Aerospace Series Nuts Anchor Self-Locking One Lug Fixed with Counterbore in Heat Resisting Steel MoS2 Lubricated Classification 1 100 MPa (at Ambient Temperat.pdf

1、CEN PRENx3539 93 = 3404569 0044678 430 Edition approved for publication AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months after the date of publication to C3 Chairman prEN 3539 Edition P 1 April 1993 EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AEROSP

2、ATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : Descriptors : ENGLISH VERSION Aerospace series Nuts, anchor, self-locking, one lug, fixed, with counterbore, in heat resisting steel, Mos2 lubricated Classification : 1 100 MPa (at ambi

3、ent temperature) / 315 OC Srie arospatiale Luft- und Raumfahrt fixes, simple patte, einseitiger Flansch, crous river, freinage interne, Annietmuttern, selbstsichernd, avec chambrage, mit zylindrischer Aussenkung, en acier rsistant chaud, lubrifis Mos2 Classification : 1 100 MPa ( temprature ambiante

4、) I315 OC aus hochwarmfestem Stahl, MoS2-geschmiert Klasse : 1 100 MPa (bei Raumtemperatur) I 31 5 OC This “Aerospace Series“ Prestandard 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

5、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 interchangeability is affected, physically

6、 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 (European Committee for Standardizat

7、ion) for formal vote. 1993-04-26 AECMA Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE Mr. ARENA I I aecma 199 COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCEN PRENx3539 93 = 3404589 0044b79 377

8、 O O O prEN 3539 Page 3 1 Scope This standard specifies the characteristics of one lug counterbored fixed anchor nuts, with a self- locking feature achieved by forming the upper portion out-of-round, in heat resisting steel, MOS, lubricated. Classification : 1 1 O0 MPa / 31 5 OC 2, 2 Normative refer

9、ences IS0 3168 IS0 5855-2 IS0 5858 IS0 8788 EN 2000 EN 2398 EN 2399 EN 2424 EN 2491 EN 3042 EN 3638 EN 3639 TR 3791 Aerospace - Self-locking, fixed, single-lug anchor nuts with counterbore, classification 1 100 MPa / 235 OC Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts Aerosp

10、ace - Self-locking nut 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 assurance - EN aerospace products - Approval of the quality system of manufacturers Heat resi

11、sting steel FE-PA92-HT - R, 2 900 MPa - Bars for machined bolts D I25 mm - Aerospace series 3, Heat resisting steel FE-PA92-HT - R, 2 900 MPa - Bars for forged bolts D I25 mm - Aerospace series 3, Aerospace series - Identification marking of standard fasteners 3, Aerospace series - Molybdenum disulp

12、hide dry lubricants - Coating methods 4, Aerospace series - Quality assurance - EN aerospace products - Qualification Aerospace series - Heat resisting steel FE-PA92HT - Solution treated - Sheet and strip - a I 3 mm 4) Aerospace series - Heat resisting steel FE-PA92HT cold worked and softened - Bars

13、 and wires for continuous cold forging or extrusion of fasteners - 3 mm I D I 30 mm - R, 2 900 MPa 4, Aerospace series - Materials for all metal self-locking nuts and thin wall inserts of temperature classes I425 OC 5, 1) Corresponds to strength class of the associated bolt, the 100 per cent load of

14、 which it is able to withstand, when tested 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 temperature has been restored. The maximum temperature is conditionn

15、ed by the surface treatment. 3) Published as AECMA Standard at the date of publication of this standard 4) In preparation at the date of publication of this standard 5) Published as AECMA Technical Report at the date of publication of this standard Previous page is blank COPYRIGHT Association Europe

16、ene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCEN PREN+3539 93 = 3404589 0044680 O99 prEN 3539 Page 4 3 Required characteristics 3.1 See figure 1 and table 1. Dimensions and tolerances are : in conformity with IS0 3168, expressed in millimetres and apply before

17、Mos2 lubrication. Form and position tolerances shall be in conformity with IS0 8788. Configuration - Dimensions - Masses 3.2 Materials EN 2398, EN 2399, EN 3638, EN 3639 or TR 379 3.3 Surface treatment EN 2491, thickness not specified O O COPYRIGHT Association Europeene Des Constructeurs de Materiel

18、 AerospaceLicensed by Information Handling ServicesCEN PREN*3539 93 = 3L104589 0044683 T25 = prEN 3539 Page 5 Remove sharp edges 0,l to 0,4 J Marking Radius = K12 1 1) These values in micrometres apply prior to surface treatment. The values do not apply to threads, punched holes or sheared edges, th

19、e surface texture of which will be as achieved by usual manufacturing 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 1) In accordance with IS0 5855.2. In the self-locking zone, the tolerances apply before formi

20、ng out-of-round. 2) Is to sharp comers (chamfered) or point of tangency (radiused). 3) Is applicable at the rivet hole location. 41 Diameter code 030 does not have counterbore. COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCEN PRENx35

21、39 93 H 3404589 0044b82 961 = Option Plain rivet holes prEN 3539 Page 6 Code - (hyphen) 4 Designation EXAMPLE : Description block NUT Identity block r I Hole code (see table 2) Diameter code (see table 1) NOTE : If necessary, the originator code 19005 shall be placed between the description block an

22、d the identity block. Table 2 K Dimpled or countersunk rivet holes 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