1、STD-AECMA PREN 4511-ENGL 2DUU LUL23LL OOL77OL b37 = AECMA STANDARD prEN 4591 NORME AECMA Edition P 1 AECMA NORM February 2000 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Far. (+32) 2 775 81 11 Edition approved for
2、publication 2000-02-29 ICs: 49.030.30 Comments should be sent within six months C3 Chairman after the date of publication to Gulledelle 94 AECMA Mr Visconti 8-1200 BRUXELLES Descriptors: aircraft industry, fastener, nut (fastener), floating nut, self-locking nut, nickel alloy, heat resistant materia
3、l, classification, dimension, surface treatment, designation, marking ENGLISH VERSION Aerospace series Nuts, barrel, self-locking, floating, self-aligning, in heat resisting nickel base alloy, Mos2 lubricated Classification: 1 550 MPa (at ambient temperature) / 315 OC Srie arospatiale Luft- und Raum
4、fahrt Sel bsteinstellende, aus hochwarmfester Nickelbasislegierung, lubrifis Mosz Mosz-gesc hmiert Klasse: I 550 MPa (bei Raumtemperatur) I315 OC crous porte cylindrique, freinage interne, en alliage rsistant chaud base de nickel, Classification : I 550 MPa ( temperature ambiante) / 315 OC flottants
5、, orientables, freibewegliche, selbstsichernde Tonnenmuttern, This Herospace Series“ Prestandar has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA- Members. It has been technically approved by
6、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 or functionally, without re-identification of the sta
7、ndard. 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 Sfandard to CEN (European Committee for Standardization) for formal vote. STD. AECflA PHEN Il!iIL*-ENGI- ,
8、ZOUO LU12333 0037902 575 E Page 3 prEN 4591 : 2000 I Scope This standard specifies the characteristics of self-locking, floating, self-aligning barrel nuts, in heat resisting nickel alloy, Mos2 lubricated. Classification: 1 550 MPa 1) / 31 5 “C 2) 2 Normative references IS0 5855-2 Aerospace - MJ thr
9、eads - Part 2: Limit dimensions for bolts and nuts IS0 5858 Aerospace - Nuts, self-locking, with maximum operating temperature less than or equal to 425 “C - Procurement specification IS0 8788 Aerospace - Fasteners - Tolerances of form and position for nuts IS0 12278 Aerospace - Nuts, barrel, self-l
10、ocking, floating, self-aligning, with MJ thread, Classifications: 900 MPa (at ambient temperature) I235 “C, 1 100 MPa (at ambient temperature) I 235 OC, 1 250 MPa (at ambient temperature) / 235 “C and 1 550 MPa (at ambient temperature) I 235 “C - Dimensions EN 2000 Aerospace series - Quality assuran
11、ce - EN aerospace products - Approval of the quality system of manufacturers EN 2424 Aerospace series - Marking of aerospace products EN 2491 Aerospace series - Molybdenum disulphide dry lubricants - Coating methods EN 3042 Aerospace series - Quality assurance - EN aerospace products - Qualification
12、 procedure EN 3666 Aerospace series - Heat resisting alloy NI-PH2601 - Solution treated and cold worked - Bar for forged fasteners - D I 50 mm - 1 550 MPa 2 R, I I 830 MPa 3) 1) Corresponds to the minimum tensile stress which the nut is able to withstand at ambient temperature without breaking or cr
13、acking 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 characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by the surface treatment. 3) Published
14、 as AECMA Prestandard at the date of publication of this standard STB=AECMA PREN 459L-ENGI- 2UOU IB LOL233L 0037703 401 Page 4 prEN 4591: 2000 3 Required characteristics 3.1 See figure I and table 1. Dimensions and tolerances are: in conformity with IS0 12278 (except for temperature class), expresse
15、d in millimetres and apply before Mos2 lubrication. Details of form not stated are at the manufacturers option. Configuration - Dimensions - Masses 3.2 IS0 8788 Tolerances of form and position 3.3 Material EN 3666 3.4 Surface treatment EN 2491, thickness not specified, mandatory on threads, optional
16、 on other surfaces Remove sharp edges 0,l to 0,4. b Page 5 prEN 4591 : 2000 3 1 Key 1 Marking 2 Thread element 3 Cradle a sheared edges the surface texture of which will be as achieved by usual manufacturing methods. These values in micrometres apply before surface treatment. They do not apply to th
17、reads, punched holes or Thread Form out-of-round in this area to achieve the self-locking torque requirement. Tooling marks permissible in this area Means of retaining nut in cradle are manufactureis option providing envelope and performance requirements are met. d e Minimum radial float: 0,4 Figure
18、 I STD.AECMA PKEN li593-ENGl.- 20013 A 3012333 0027705 Page 6 prEN 4591: 2000 Installation hole size Mass Table 1 I I l i Diameter Thread a H K N P T max. max. -0,25 O max. O +0,25 10,6 I 9,5 I 3,35 1 6,8 I 8,2 I 13 I 6,80 I 070 (MJ7x1-4H5H I 13,9 I 15 14 I 8,20 I 080 lMJ8x1-4H5H I 14,9 I 17 15 I 9,
19、50 I 100 (MJlOx1,25-4H5H I 17,9 1 20 15 I 12,5 I 4,6 I 1018 I 12 18 I 13,60 I 120 I MJ12x1,25-4H5H 1 21,9 I 24 18,l I 15,7 I 5,7 I 12,8 I 14,2 22 I 37,20 I 140 IMJ14x1,5-4H5H I 25,9 I 28 22,2 I 17,2 I 6,5 I 14,8 I 16,5 26 I 63,50 I 160 IMJ16x1,5-4H5H 1 29,9 1 32 25,7 I 19,5 I 7,55 I 16,8 I 18,6 30 1
20、 81,70 I 180 (MJ18xII5-4H5H 1 32,9 I 36 26,2 I 22 I 8,45 I 18,8 I 20,8 33 I 104,30 I 200 (MJ20x1,5-4H5H 1 36,9 I 40 29,3 I 25,5 I 9,6 I 20,8 I 23 37 I 150,OO I 32,l I 26 I 10,35 I 22,8 I 25,2 41 I 181,OO I 35 I 28,6 I 11,251 1 24,8 I 27,5 44 I 210,oo I a in accordance with IS0 5855-2. In the ceif-lo
21、cking zone, the tolerances apply before forming out-of-round. Approximate values (kg/l O00 pieces), given for information purposes only I 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.
