1、7- CEN PREN+3b53 92 W 3V04589 0033588 b03 after the date of publication decision A.E C M A Technopolis - 175. rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cdex - FRANCE 1992-1 1-1 7 A. E .C. M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM Mr. ARENA +c = prEN 3653 Edition P 1 November 1992 E
2、DITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AEROSPATIAL Technopolic - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cdex - T1 (1 ) 47 36.98.76 UDC : Key words : ENGLISH VERSION Aerospace series Nuts, anchor, self-locking, floating, self-aligning, one lug, in steel,
3、cadmium plated, Mos2 lubricated Classification : 900 MPa (at ambient temperature) / 235 OC . Srie arospatiale Luft- und Raumfahrt Ecrous river, freinage interne, flottants, orientables, simple patte, en acier, cadmis, lubrifis Mos2 Classification : 900 MPa (A temprature ambiante) / 235 OC Annietmutt
4、ern, selbstsichernd, schwenkbar, einstellbar, einseitiger Flansch. aus Stahl, verkadmet, Mos2 geschmiert Klasse : 900 MPa (bei Raumtemperatur) / 235 OC This .Aerospace Series. pie-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospat
5、ial). It is published on green paper for the needs of AECMA-Members. 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
6、 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 European Standard
7、to CEN (European Committee for Standardization) for final vote. Nota - Extra copies can tie supplied by B N.A E - Technupolis 54 - 199. rue Jean-Jacques Rousseau .- 921 38 ISSY LES MOULINEAUX CEDEX - Edition approved for publication Cornmerris should be sent within SIX months I C3 Chairman 0 aecrna
8、i9a - CEN PREN*3653 92 = 3404589 0033589 54T prEN 3653 Page 3 1 Scope and field of application This standard specifies the characteristics of one lug, floating, self-aligning anchor nuts with a self-locking feature achieved by forming the upper portion out of round, in steel, cadmium plated, Mos2 lu
9、bricated, classification 900 MPa l) / 235 OC 2). 2 References IS0 5855-2 IS0 5858 IS0 8788 EN 2000 EN 2133 EN 2424 EN 2491 EN 2542 EN 2543 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
10、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 systems of manufacturers Cadmium plating of steels with maximum specified tensile strength equal to o
11、r less than 1 450 MPa and copper and copper alloys - Aerospace series 3, Aerospace series - Identification marking of standard fasteners 3, Aerospace series - Molybdenum disulphide dry lubricants - Coating methods 4, Aerospace series - Steel FE-PL43S - Annealed - Bar and wire O, I 40 mm for prevaill
12、ing torque nuts 5) Aerospace series - Steel FE-PL43S - Annealed - Sheet and strip 0,3 2 a I 2 mm for prevailling torque nuts 5) Aerospace series - Quality assurance - EN aerospace products - Qualification procedure Aerospace series - Materials for all metal self-locking nuts and thin wall inserts of
13、 temperature classes 2 425 OC 1) Corresponds to strength class of the associated bolt, the 100 per cent load a. 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 i
14、ts original characteristics, after ambient temperature has been restored. The maximum temperature is conditionned by the surface treatment. 3) Published as AECMA standard at the date of publication of this standard 41 In preparation at the date of pubtication of this standard 5) Published as AECMA p
15、re-standard at the date of publication of this standard 6) Published as AECMA technical report at the date of publication of this standard Previous page is blank _- - - .r CEN PRENr3b53 92 = 3404589 0033590 261 prEN 3653 Page 4 3 Required characteristics 3.1 See figure 1 and table 1. Configuration -
16、 Dimensions - Masses ! Dimensions and tolerances are expressed in millimetres and apply after cadmium plating but before MOS, lubrication. 3.2 Materials EN 2452, EN 2453 or TR 3791 2 3.3 Surface treatment EN 2133, 5 ,um minimum on threads and all surfaces which can be contacted by a 20 mm diameter b
17、all. On all other surfaces a continuous cadmium plating shall be present, plus EN 2491, thickness not specified. (EN PRENx3653 92 3404589 0033593 IT8 Diritneter code 050 060 - Y -_ Thread II DE FH J K L M N Radial R T Mass kg11000 pieces miri. min. O max. max. iiiax. max. min. max. max. spprox. floa
18、t + 0.2 P MJ50.8-4HH 6.7 8.75 3.5 2.5 15.2 26.7 8.3 0.9 0.7 3.5 7.2 2.6 MJGx 1 -4H5ti 7.6 12.7 7.9 4 17 31.7 10.2 4 7.8 5.7 - prEN 3653 Page 5 - 080 MJ81-4H5ti Il Break sharp edges 0,l to 0,4 5 3 20.5 33.3 11.8 1.1 0.75 8.4 I 9.9 r -I 1 I In conformity with IS0 5855-2. In the self-locking zone the t
19、olerances apply before forming out of rouiid. i! Is ai)plicat)le at the rivet hole location. 4 I ,Marking R Ftoa t included Y-Y a 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 usua
20、l manufacturing methods. 2) Tooling marks are permitted in this area. 3) Detaiis of form not stated are at the manufacturers option. Tolerances of form and position shall be in conformity with IS0 8788. Figure 1 3, Table 1 prEN 3653 Page 6 4 Designation Example : i Description block Identity block N
21、umber 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 figurel. 6 Technical specification IS0 5858 except for : - approval of manufacturers : see EN 2000 ; - qualification of. products : see EN 3042.
