1、CEN PREN*40LL 93 = 3404589 0046829 498 Edition approved for publication 1993-06-30 AECMA STANDARD NORME AECMA AECMA NORM C8 Chairman Mr. Williams Comments should be sent within six months after the date of publication to AECMA Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux C
2、edex - FRANCE prEN 4011 Edition PI June 1993 DITE 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 Descriptors : ENGLISH VERSION Aerospace series Nuts, bihexagonal, self-locki
3、ng, in heat resisting nickel base alloy NI-PIOOHT (Inconel 718), silver plated Classification : I 550 MPa (at ambient temperature) I600 OC Srie arospatiale Luft- und Raumfahrt crous bihexagonaux, freinage interne, en alliage rsistant chaud base de nickel NI-PI OOHT (Inconel 71 81, argents ( tempratu
4、re ambiante) / 600 OC Zwlfkantmuttern, selbstsichernd, aus hochwarmfester Nickelbasislegierung NI-PI OOHT (Inconel 71 81, versilbert (bei Raumtemperatur) / 600 OC Classification : 1 550 MPa Klasse : 1 550 MPa This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (As
5、sociation 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. Subsequent to the publication of this prestanda
6、rd, 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 (NPS) and formal agreement of the Official Services of the Mem
7、ber countries it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. aecrna 199 CEN PREN*4OLL 93 3404589 O046830 LOT prEN 401 1 Page 3 This standard specifies the characteristics of self-locking bihexagonal nuts in NI-PI OOHT, silver plated
8、, for aerospace applications. Classification : 1 550 MPa )/ 600 OC 2, 2 Normative references IS0 4095 Fasteners for aerospace construction - Bi-hexagonal wrenching configuration IS0 5855-2 Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts EN 2424 EN 2786 EN 2952 Aerospace series
9、- Identification marking of standard fasteners 3, Aerospace series - Electrolytic silver plating of fasteners 4, Aerospace series - Heat resisting nickel base alloy (NI-P100HT) - Solution treated and cold worked - Bar for hot upset forging fasteners - 3 I D I30 mm 5, Aerospace series - Nuts, self-lo
10、cking, with MJ threads, in heat resisting nickel base alloy NI-P100HT (Inconel 7181, silver plated - Classification : 1 550 MPa (at ambient temperature) / 600 OC - Technical specification 4, O EN 4047 3 Required characteristics 3.1 See figure 1 and table I. Dimensions and tolerances are in millimetr
11、es. They apply after silver plating. Configuration - Dimensions - Tolerances - Masses O 3.2 Material EN 2952 3.3 Surface treatment EN 2786 Thickness : - External surfaces : 5 ,um to 15 pm ; - Thread 2 MJ6 : 5 ,um min. shall be measured at the pitch diameter ; - Thread MJ5 : shall show complete cover
12、age, without thickness 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
13、 this standard 4) In preparation at the date of publication of this standard 5) Published as AECMA Prestandard at the date of publication of this standard 0 Previous page is blank CEN PREN*40LL 93 = 340459 004b83L O46 prEN 401 1 Page 4 Thread *) Code Designation O50 MJ50,8-4H6H 060 MJGxl-4H5H 070 MJ
14、7xl-4H5H Values applicable before silver plating. Mass parts E F H J K L M N Y 2 kg/l000 max. min. max. max. min. min. min. max. N 5,8 5,2 7 7 9,l 8,3 2 4,9 1,68 8,l 7,3 9 9,l 12,l 11,3 1,2 2,6 6,l 3 29 7,l 6,3 8 8,l 10,6 9,8 2r3 53 0,1 0,2 2,4 fu;rn area requt (tool Remove sharp edges 0,l to 0,4 De
15、tails of form not stated are left to manufacturers discretion. 1) All forms of entry (radius or chamfer) are permissible within these limiting dimensions. Figure 1 Table 1 O - CEN PRENx40LL 93 3404589 004b832 T82 prEN 401 1 Page 5 4 Designation EXAMPLE : Description block 1 identity block Thread code (see table 1) I NOTE : If necessary, 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 0 6 Technical specification EN 4047
