1、 AECMA PREN*4239 96 1012311 0030535 T57 AECMA STANDARD prEN 4219 NORME AECMA Edition P 1 AECMA NORM May 1996 Edition approved for publication 1996-05-31 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 6-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81
2、 11 Comments should be sent within six months after the date of publication to AECMA Gulledelle 94 8-1 200 BRUXELLES ICs : 49.040.20 Descriptors : ENGLISH VERSION Aerospace series Nuts, hexagon, self-locking by domed plastic cap, normal height, normal across flats, in corrosion resisting steel, pass
3、ivated Classification : 900 MPa (at ambient temperature) / 120 OC Srie arospatiale Luft- und Raumfahrt crous hexagonaux borgnes, Sechskant-Hutmuttern, freinage interne par calotte plastique, hauteur normale, surplats normaux, en acier rsistant la corrosion, passivs Classification : 900 MPa ( temprat
4、ure ambiante) / 120 OC selbstsichernd mit Plastikhaube, mit normaler Schlsselweite, aus korrosionsbestndigem Stahl, passiviert Klasse: 900 MPa (bei Raumtemperatur) I 120 OC This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace
5、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 Committee folio wing comment by the Member countries. Subsequent to the publication of this Prestandard, the technical content shall not be changed t
6、o an extent that 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 Eu
7、ropean 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 - 921 38 ISSY-LES-MOULINEAUX CEDEX C3 Chairman Mi Arena I aecma 1996 AECMA PREN*42L% 96 = LOL23LL 0030537 82T W Page 3 pr
8、EN 4219 : 1996 I Scope This standard specifies the characteristics of hexagonal nuts, self-locking by domed plastic cap, normal height, normal across flats, in corrosion resisting steel, passivated. Classification : 900 MPa 1) / 120 OC 2). 2 Normative references IS0 5855-2 Aerospace - MJ threads - P
9、art 2 : Limit dimensions for bolts and nuts IS0 5858 Aerospace - Self-locking nuts with maximum operating temperature less than or equal to 425 OC - Procurement specification IS0 8788 Aerospace - Fasteners - Tolerances of form and position for nuts EN 2000 Aerospace series - Quality assurance - EN a
10、erospace products - Approval of the quality system of manufacturers EN 2424 Aerospace series - Marking of aerospace products EN 2516 Aerospace series - Passivation of corrosion resistant steels and decontamination of nickel base alloys 3) EN 3042 Aerospace series - Quality assurance - EN aerospace p
11、roducts - Qualification procedure 3 Required characteristics 3.1 See figure 1 and table 1. Dimensions and tolerances are expressed in millimetres and apply after surface treatment. Details of form not stated are at the manufacturers option. Configuration - Dimensions - Masses 3.2 IS0 8788 Tolerances
12、 of form and position 3.3 Materials Threaded element : FE-PA1801 Plastic cap : polyamide 6.6 3.4 Surface treatment EN 251 6, process class appropriate to the material 1) Corresponds to the minimum tensile stress which the nut is able to withstand at ambient temperature without breaking or cracking w
13、hen 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 plastic cap. 3) Published as AECMA Sta
14、ndard at the date of publication of this standard AECMA PRENs4219 96 W 3032333 0030538 7bb W Diameter code 030 040 050 060 080 Page 4 prEN 4219 : 1996 Thread l) E F H L M N P R S T U Mass2) min. max. min. max. min. min. min. max. min. max. 7,6 7 5 MJ30,5-4H6H 7,7 3,2 5.4 0,4 1,8 4,8 5,6 2 0,91 MJ40,
15、7-4H6H h12 8,s 4.2 +Or6 6,4 2.4 5,8 6,6 2,6 1 ,O7 MJ50.8-4H6H 8,7 8 9,s 5,2 7,4 0,2 3.2 6,6 7,6 3,2 6 1.49 MJ6x1-4H5H 10,9 10 12,5 6,3 +0,8 9,s 4 7,8 9,8 3,9 7,2 2,90 MJ8x1-4H5H 14,3 13 15.7 8.3 o 12,2 5,5 10.8 12.9 5,2 9,5 6,17 o O, 5 hl 3 Remove sharp edges 0,l to 0,4 “I I x-x Threaded element N O
16、 O O (7 9 c 1) These values in micrometres apply before surface treatment. They do not apply to threads the surface texture of which will be as achieved by usual manufacturing methods. 2) Ali forms of entry (chamfer or radius) option within these limiting dimensions 3) Form of contour within these l
17、imiting dimensions is at the manufacturers option. Diameter M may be tangential to, but shall not intrude on the flats. 4) Minimum recommended bolt entry to insure satisfactory locking performance. 5) Maximum recommended bolt entry to avoid contact with the top of the cap. Figure 1 AECMA PREN+4219 9
18、b m 1012311 0010539 bT2 Description block NUT Page 5 prEN 4219 : 1996 Identity block EN421 9-050 4 Designation EXAMPLE : I - Number of this standard Diameter code (see table 1) 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 1. 6 Technical specification IS0 5858, except for : - - Approval of manufacturers : see EN 2000 ; Qualification of products : see EN 3042.
