1、AECMA STANDARD NORME AECMA AECMA NORM prEN 4590 Edition P I February 2000 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 1 O - Fax. (+32) 2 775 81 I 1 ICs: 49.030.99 Descriptors: aircraft industry, fastener, nut (fastener)
2、, self-locking nut, spring washer, corrosion resistant steel, classification, dimension, surface treatment, designation, marking ENGLISH VERSION Aerospace series Retainers, spring, sheet metal, for self-locking barrel nuts, in corrosion resisting steel, passivated Srie arospatiale Luft- und Raumfahr
3、t Ressorts de retenue en tle pour crous porte cylindrique, freinage interne, en acier rsistant la corrosion, passivs Blechsicherungsfedern fr selbstsichernde Tonnenmuttern, aus korrosionsbestndigem Stahl, passiviert This Herospace Series“ Prestandard has been drawn up under the responsibility of AEC
4、MA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA- Members. It has been technically approved by the experts of the concerned Technical Cornmittee following comment by the Member countries. Subsequent to the publication of this Prestandard, t
5、he technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-iden tification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member
6、countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 92138 ISSY-CES-MOULINEAUX CEDEX I I Edition approved for publication I Comm
7、ents should be sent within six months after the date of publication to 2000-02-29 AECMA Gulledelle 94 8-1200 BRUXELLES C3 Chairman Mr Visconti I l 0 aecma 201 STD=AECMA PREN Y59Cl-ENGL 20110 6 70123LL 0037897 388 = Page 3 prEN 4590: 2000 1 Scope This standard specifies the characteristics of sheet m
8、etal spring retainers in corrosion resisting steel, passivated, for use with self-locking barrel nuts EN 4591. 2 Normative references IS0 5858 Aerospace - Nuts, self-locking, with maximum operating temperature less than or equal to 425 “C - Procurement specification IS0 8788 Aerospace - Fasteners -
9、Tolerances of form and position for nuts IS0 12280 Aerospace - Retainers, spring, sheet metal, for self-locking barrel nuts - Dimensions EN 2000 Aerospace series - Quality assurance - EN aerospace products - Approval of the quality system of manufacturers EN 2424 Aerospace series - Marking of aerosp
10、ace products EN 2516 Aerospace series - Passivation of corrosion resisting steels and decontamination of nickel base alloys EN 2540 Aerospace series - Steel FE-PM3902 (X7CrNiAll7-7) - Air melted - Solution treated and precipitation hardened - Sheet and strip - a I 6 mm - 1 240 MPa I R, I I 450 MPa C
11、 1) EN 3042 Aerospace series - Quality assurance - EN aerospace products - Qualification procedure EN 3638 Aerospace series - Heat resisting alloy FE-PA2601 (XGNiCrTiMoV26-15) - Consumable electrode remelted - Solution and precipitation treated - Sheet, strip and plate - 03 mm I a I 10 mm 1) EN 4591
12、 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 “C 1) I) Published as AECMA Prestandard at the date of publication of this standard prN 4590: 2000 3 Required chara
13、cteristics 3.1 See figure 1 and table 1. Dimensions and tolerances are; in conformity with IS0 12280, expressed in millimetres and apply after suriace treatment. Details of form not stated are at the manufacturers option. Configuration - Dimensions - Masses 3.2 IS0 8788 Tolerances of form and positi
14、on 3.3 Materials EN 2540 or EN 3638 3.4 Surface treatment EN 2516, process class appropriate to the material STD-AECMA PREN LI57-ENGL ZGOn E LO32313 0037877 350 Page 5 prEN 4590: 2000 To burr. Index type - Code A 2 pT?y -i- m -+-I Clearance type - Code B Key 1 2 Marking a vertical movement. undesira
15、ble. when installed in the installation hole specified in the companion barrel nut standard EN 4591. Barrel nut outline, shown for reference purposes. See companion nut standard EN 4591. Retainers shall be supplied in the open position as shown by phantom lines. Index type retainers code “A“ are use
16、d in blind areas where index feature locates in hole to prevent rotation or Clearance type retainers code “6“ are used where nut is accessible or where bolt hole in far side of barrel cavity is Code “6 type nut retainers and nut assembly shall require a push out force in accordance with tabulated va
17、lues b d Figure I STB=ACCMA PKEN l459U-ENGL 213011 U LO12311 003,7900 7T2 W Page 6 prEN 4590:2000 Push out force N min. Table I Mass a 9 0,78 0,97 1,17 1,36 2,90 3,20 3,60 4,02 I 0844 I L 220 44 18,8 28 23 393 22,3 3 240 48 19,9 32 25 42,5 24,3 313 0,38 0,49 0,515 a Approximate values (kg/l O00 piec
18、es), given for information purposes only 4 Designation EXAMPLE: Description block I Identity block RETAINER I EN4590A060 TT Number of this standard Type code (see figure I) Diameter code (see table I) 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 I 6 Technical specification IS0 5858, except for: - Approval of manufacturers: see EN 2000; - Qualification of products: see EN 3042.
