1、CEN PREN*4L2L 94 3404589 0062655 955 W AECMA STANDARD NORME AECMA AECMA NORM prEN 4121 Edition P 1 February 1994 _ DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL Technopolis - 175, rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cedex - Tl. (1) 47.36.98.76 UDC : Descr
2、iptors : ENGLISH VERSION Aerospace series Shank nuts, serrated, self-locking, in heat resisting steel FE-PA92HT (A2861, silver plated on thread Classification : 1 100 MPa (at ambient temperature) I 650 OC Srie arospatiale Luft- und Raumfahrt crous dentels sertir, freinage )terne, en acier rsistant c
3、haud FE-PA92HT (A2861, Einnietmuttern, verzahnt, selbstsichernt-, aus hochwarmfestem Stahl FE-PA92HT (A286), argents sur filetage Gewinde versilbert Classification : 1 100 MPa Klasse : 1 100 MPa ( temprature ambiante) / 650 OC (bei Raumtemperatur I650 OC This “Aerospace Series“ Prestandard has been
4、drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). 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 following comment by the Member countries. S
5、ubsequent 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 standard. After examination and signature of the AECMA Standard Checking Centre (NPSI and formal
6、 agreement of the Official Services of the Member 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. - Technopoiis 54 - 199, rue Jean-Jacques Rousseau - 921 38 ISSY-LES-MOULINEAU
7、X CEDEX - C8 Chairman - Comments should be I after the date of publication to Edition approved for publication 1994-02-28 AECMA Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cedex - FRANCE M. Williams I I aecma 1991 Copyright Association Europeene des Constructeurs de Mater
8、iel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-CEN PRENx4121 94 m 3404589 0062656 891 Page 3 prEN 4121 : 1994 I Scope This standard specifies the characteristics of self-locking serrated shank nuts in FE-PA9
9、2HT, silver plated on thread, for aerospace applications. Classification : 1 100 MPa / 650 OC *) 2 Normative references IS0 5855-2 Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts EN 2399 Heat resisting steel FE-PA92-HT - R, 2 900 MPa - Bars for forged bolts - D I25 mm - Aerospa
10、ce series 3, EN 2424 Aerospace series - Identification marking of standard fasteners 3, EN 2786 Aerospace series - Metallic silver coating - Technical specification 4, EN 3004 Aerospace series - Nuts, self-locking, in heat resisting steel FE-PA92HT (A2861 - Classification : 1 100 MPa / 650 OC - Tech
11、nical specification 4, EN 3064 Aerospace series - Self-locking serrated shank nuts - Assembly procedure 4, EN 3065 Aerospace series - Installation holes for self-locking serrated shank nuts - Design specification 4) EN 3639 Aerospace series - Heat resisting steel FE-PA92HT, cold worked and softened
12、- Bars and wires for continuous cold forging or extrusion of fasteners - 3 mm I D I30 mm - 900 MPa I R, 5 1 100 MPa 5, 3 Required characteristics 3.1 Configuration - Dimensions - Tolerances - Masses See figure 1 and table 1. Dimensions and tolerances are in millimetres. They apply after silver plati
13、ng. 3.2 Materials EN 2399 or EN 3639 3.3 Surface treatment EN 2786 on thread only Thickness : - Thread 2 MJ6 : 5 ,um min. on thread flanks ; - Thread MJ5 : shall show complete coverage, without thickness requirement. Coating may extend to counterbore and chamfers at manufacturers option, without thi
14、ckness requirement. 1) The strength class of the bolt concerned which can withstand the load at ambient temperature when tested at 100 % load without cracking or breaking of the nut. 2) Maximum test temperature of the parts 3) Published as AECMA Standard at the date of publication of this standard 4
15、) Published as AECMA Prestandard at the date of publication of this standard 5) In preparation at the date of publication of this standard Previous page is blank - Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo repr
16、oduction or networking permitted without license from IHS-,-,-CEN PRENx4121 94 3404589 00b2b57 728 - Thread A B 1 C D max. I min. max. I min. min. Page 4 prEN 4121 : 1994 FG min. Values apply before silver plating. Thread surface will be as achieved by normal methods of manufacture ( Form out-of-rou
17、nd in this area to achieve the self-locking requirement (tooling marks permissible). Remove sharp edges 0,i too,4 I MJ5xOI8-4H6H MJ6x1-4H5H MJ7xl-4H5H MJ8xl-4H5H Marking 6,3 10,l 9,8 6,8 6,l 0,9 5,12 7,7 11,5 11,2 8,6 7,s 6,56 8,4 12,7 12,4 97 9 114 8.10 915 10 9,3 Stvle 1 Diameter code 050 060 070
18、080 Number of teeth J ao f 1 O E K Wire S U Mass kg/l O00 Style Style max. min. max. min. No. P max. min. max. min. 1 2 1,71 1,97 102O 8,98 8,75 8,17 7,91 2 1,2 10,638 10,547 2,73 3,02 3.46 3.04 O2 10,28 10,05 9,44 9,18 3 1,5 12,536 12,445 2,9 2,l 3.58 4,21 102O 86O30 7,38 7,15 6,62 6,36 3 1,0 8,730
19、 8,639 2,4 1,6 Diameter 060 070 k Style 2 P (wire) . Z NOTE : Configurations, style 1 or style 2, are admitted. Figure 1 Table 1 I 080 II) Applicable before forming out-of-round max. Table 1 (concluded) Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under l
20、icense with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-CEN PREN*4LZL 94 3404589 0062658 664 Description block NUT Page 5 prEN 4121 : 1994 Identity block EN41 21 -080 4 Designation EXAMPLE : Number of this standard I Thread code (see table 1) NOTE : If ne
21、cessary, the code 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style A, as indicated on figure 1. 6 Technical specification EN 3004 7 Installation holes EN 3065 b 8 Installation procedure EN 3064 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-
