1、- STD-AECMA PREN 22b4-ENGL 1975 1012311 00125q5 780 D for pubkation 1995-03-31 AECMA STANDARD NORME AECMA AECMA NORM - can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau 92138 ISSY - LES - MOULINEAUX CEDEX - FRANCE prEN 2264 Edition 2 March 1995 CDITe PAR LASSOCIATION EURO
2、PEENNE DES CONSTRUCTEURS DE MATERIEL AEROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 ICs : 49.040.20 Supersedes edition 1 November 1982 Descriptors : Aircraft industry, fastener, nut : fastener, anchor nut, self-locking nut, alloy st
3、eel, specification, dimension, dimensional tolerance, surface treatment, designation, marking ENGLISH VERSION Aerospace series Nuts, anchor, self-locking, floating, two lug, incremental counterbore, in alloy steel, cadmium plated, Mos2 lubricated Classification : 900 MPa (at ambient temperature) I 2
4、35 OC Srie arospatiale crous river, freinage interne, flottants, double patte, chambrage trs profond, en acier alli, cadmis, lubrifis MOS, Classification : 900 MPa ( temprature ambiante) / 235 OC Luft- und Raumfahrt Annietmuttern, selbstsichernd, beweglich, beiderseitiger Flansch, mit unterschiedlic
5、h tiefer zylindrischer Aussenkung, aus legiertem Stahl, verkadmet, Mos2-geschmiert Klasse : 900 MPa (bei Raumtemperatur) / 235 OC This “Aerospace series“ Standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on y
6、ell0 w paper in three equivalent versions (English, French, German). It will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Edition approved I The equivalent versions in French and German lanauaaes I STD-AECMA PREN 22b4-ENGL 1775 m 1012311
7、001254b bL7 m Page 3 prEN 2264 : 1994 1 Scope This standard specifies the characteristics of self-locking, floating, two lug anchor nuts, with incremental counterbore, in alloy steel, cadmium plated, Mos2 lubricated. Classification : 900 MPa ) / 235 OC 2, 2 Normative references This European Standar
8、d incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to thi
9、s European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. IS0 5855-2 IS0 5858 Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts Aerospace - Self-locking nuts with maximum operating
10、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 systems of manufacturers Cadmium plating of steels with maximum specified tensi
11、le strength equal to or less than 1 450 MPa and copper and copper alloys - Aerospace series 3, Aerospace series - Marking of aerospace products Aerospace series - Molybdenum disulphide dry lubricants - Coating methods 4, Aerospace series - Steel FE-PL43S - Annealed - Bar and wire - De I 40 mm for pr
12、evailing torque nuts 5) Aerospace series - Steel FE-PL43S - Annealed - Sheet and strip - 0,3 S a I 2 mm for prevailing torque nuts 5) EN 3042 Aerospace series - Quality assurance - EN aerospace products - Qualification procedure TR 3791 Aerospace series - Materials for all metal self-locking nuts an
13、d thin wall inserts of temperature classes I 425 OC 6, IS0 8788 EN 2000 EN 2133 EN 2424 EN 2491 EN 2542 EN 2543 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) M
14、aximum 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 cadmium plating. 3) Published as AECMA Standard at the date of publication of this standard 4
15、) In preparation at the date of publication of this standard 5) Published as AECMA Prestandard 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 STD-AECMA PREN 22bli-ENGL 1995 LO123L1 OOL25q7 553 Page
16、 4 prEN 2264 : 1995 3 Required characteristics 3. i Configuration - Dimensions - Masses See figure 1 and table 1. Dimensions and tolerances are expressed in millimetres and apply after cadmium plating but before lubrication. Details of form not stated are at the manufacturers option. 3.2 IS0 8788 To
17、lerances of form and position 3.3 Materials Threaded element : EN 2542, EN 2543 or TR 3791 Cage : EN 2543 or TR 3791 3.4 Surface treatments EN 2133, 5 ,um min. on threads and all surfaces which can be contacted by a 20 mm diameter ball. On all other surfaces, a continuous deposit shall be present. E
18、N 2491, thickness not specified, mandatory on threads, optional on other surfaces STD-AECMA PREN 22bli-ENGL 1995 W LOL23LL 00125li8 49T Page 5 prEN 2264 : 1994 T rnax. 4.5 4,6 5,5 Remove sharp edges 0,l to 0,4 Z Radial float min. 0.5 0,5 0,5 Z K Float inclusive U I Y-Y A - i- , Threaded element /“ I
19、 I X (4:l) Radius or chamfer 1) 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 A Diameter Thread
20、Counterbore I code I I lEIF 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 I 4) Approximate values (kg/l O00 pieces), calculat
21、ed on the basis of 7,85/kg/dm3, given for information purposes only 1 - _ STD-AECMA PREN 2264-ENGL 1795 9 LOL23LL OOL25Li7 32b 9 Page 6 prEN 2264 : 1995 Description block 4 Designation EXAMPLE : Identity block EN2264-06008 Diameter code (see table 1) NOTE : If necessary, the code I9005 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.
