1、 ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM ASD-STAN prEN 2894 Edition P3 2017-07 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Rue Montoyer, 10/5 - B-1000 Brussels, Belgium - Tel +32 2 775 81 26 - Fax +32 2 775 81 31 - www.asd-stan.org ICS: Descriptor
2、s: ENGLISH VERSION Aerospace series Nuts, bihexagonal, self-locking, with counterbore, in heat resisting nickel base alloy, passivated, MoS lubricated Classification: 1 550 MPa (at ambient temperature) / 315 C Luft- und Raumfahrt Zwlfkantmuttern, selbstsichernd, mit zylindrischer Aussenkung, aus hoc
3、hwarmfester Nickelbasislegierung, passiviert, MoS-geschmiert Klasse: 1 550 MPa (bei Raumtemperatur) / 315 C Srie arospatiale crous bihexagonaux, freinage interne, avec chambrage, en alliage rsistant chaud base de nickel, passivs lubrifis MoS Classification: 1 550 MPa ( temprature ambiante) / 315 C T
4、his “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned
5、 Domain following member comments. 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 standard. After examination and review by users and formal a
6、greement of ASD-STAN, the ASD-STAN prEN will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving the EN t
7、he status of a national standard and by withdrawing any national standards conflicting with the EN. ASD-STAN Technical Committee approves that: “This document is published by ASD-STAN for the needs of the European Aerospace Industry. The use of this standard is entirely voluntary, and its applicabil
8、ity and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” ASD-STAN reviews each standard and technical report at least every five years at which time it may be revised, reaffirmed, stabilized or cancelled. ASD-STAN invit
9、es you to send your written comments or any suggestions that may arise. All rights reserved. No parts of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written
10、permission of ASD-STAN. Order details: E-mail: salesasd-stan.org Web address: http:/www.asd-stan.org/ Edition approved for publication 1stJuly 2017 Comments should be sent within six months after the date of publication to ASD-STAN Mechanical Domain prEN 2894:2017 (E) 2 Contents Page Foreword 3 1 Sc
11、ope 4 2 Normative references 4 3 Required characteristics 4 3.1 Configuration Dimensions Mass 4 3.2 Tolerances of form and position 5 3.3 Material . 5 3.4 Surface treatments . 5 4 Designation 6 5 Marking . 6 6 Technical specification 6 (informative) Standard evolution form 7 Annex ABibliography 8 pr
12、EN 2894:2017 (E) 3 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Mechanical Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication.
13、prEN 2894:2017 (E) 4 1 Scope This standard specifies the characteristics of self-locking bihexagonal nuts, with counterbore, in heat resisting nickel base alloy, passivated, MoS2lubricated. Classification: 1 550 MPa1)/ 315 C2). 2 Normative references The following documents, in whole or in part, are
14、 normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2424, Aerospace series Marking of aerospace products
15、EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods EN 2516, Aerospace series Passivation of corrosion resistant steels and decontamination of nickel base alloys EN 2952, Aerospace series Heat resisting alloy NI-PH2601 Solution treated and cold worked; bar for forged faste
16、ners D 50 mm, 1270 MPa Rm 1550 MPa3)ISO 4095, Aerospace Bihexagonal drives Wrenching configuration Metric series4)ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts4)ISO 5858, Aerospace Nuts, self-locking, with maximum operating temperature less than or equal to 425 C Procu
17、rement specification4)ISO 8788, Aerospace Nuts, metric Tolerances of form and position4)3 Required characteristics 3.1 Configuration Dimensions Mass See Figure 1 and Table 1. Dimensions and tolerances are expressed in millimetres and apply after passivation but before MoS2lubrication. Details of for
18、m not stated are at the manufacturers option. 1) Corresponds to the minimum tensile stress which the nut is able to withstand at ambient temperature without breaking or cracking when tested with a bolt of a higher strength class. 2) Maximum temperature that the nut is able to withstand, without perm
19、anent alteration to its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by the surface treatment. 3) Published as ASD-STAN Prestandard at the date of publication of this standard (http:/www.asd-stan.org/). 4) Published by: ISO Internation
20、al International Standardisation Organisation (http:/www.iso.ch/). prEN 2894:2017 (E) 5 3.2 Tolerances of form and position See ISO 8788. 3.3 Material See EN 2952. 3.4 Surface treatments EN 2516, process class appropriate to the material. EN 2491, thickness not specified. The surface values in micro
21、metres apply before surface treatment. They do not apply to threads the surface texture of which will be as achieved by usual manufacturing methods. Key 1 28 to 50 2 Thread 3 90 to 120 4 Form out-of-round in this area to achieve the self-locking torque requirement 5 Marking a Also applies to lower c
22、hamfer. All forms of entry (chamfer or radius) optional within these limiting dimensions. b Tooling marks are permitted in this area. c Wrench pad engagement. d Bihexagonal configuration in accordance with ISO 4095 over length N. Figure 1 prEN 2894:2017 (E) 6 Table 1 Diameter code ThreadaF G H J K M
23、 N P Massbmax. max. min. min. min. min. min. 050 MJ50,84H6H 7 9,1 9,4 5,5 8,3 1,2 2 2,4 2,52 060 MJ614H5H 8 10,6 10,8 6,5 9,8 2,3 2,7 4,29 070 MJ714H5H 9 12,1 11,8 7,5 11,3 2,6 5,91 080 MJ814H5H 10 13,6 13,1 8,5 12,8 2,8 8,77 100 MJ101,254H5H 12 16,8 16 10,5 15,8 3,1 2,9 13,16 120 MJ121,254H5H 14 19
24、,9 18 12,5 18,8 1,4 3,5 22,98 140 MJ141,54H5H 17 23 20,7 14,5 21,9 1,7 4 3,2 30,28 160 MJ161,54H5H 19 26 23,2 16,5 24,9 1,9 4,7 42,82 180 MJ181,54H5H 22 29,1 25,7 18,5 28 2,1 5,6 59,52 200 MJ201,54H5H 24 32,3 28,2 20,5 31,2 2,3 6,8 77,28 220 MJ221,54H5H 27 35,4 30,7 22,5 34,3 2,5 8,3 110,73 240 MJ24
25、24H5H 30 38 33,7 24,5 36,9 2,7 10,1 3,7 130,55 aIn accordance with ISO 5855-2. In the self-locking zone, the tolerances apply before forming out-of-round. bApproximate values (kg/1 000 pieces), calculated on the basis of 8,195 kg/dm3, given for information purposes only. 4 Designation EXAMPLE NOTE I
26、f necessary, the code I9005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style N. See Figure 1. 6 Technical specification ISO 5858, except for: Approval of manufacturers: The manufacturers operations shall be an approved production organisation for aerospa
27、ce products and shall demonstrate that it has implemented and is able to maintain a quality system (e.g. according to EN 9100 or another in aerospace accepted and established quality management system). Qualification of products: The product qualification shall be performed to the process as defined
28、 in e.g. EN 9133 to achieve a qualification approval from the controlling Certification Authority (CA). prEN 2894:2017 (E) 7 Annex A(informative) Standard evolution form MODIFICATION REASON AND VALIDATION Key MbCoat currently defined by the standard reference for prEN 2894:1995-03 P1. MaChanged. M r
29、eference is not well defined. A standard reference is proposed with Maand was corrected in Figure 1. prEN 2894:2017 (E) 8 Bibliography 1 EN 9100, Aerospace series Quality Management Systems Requirements (based on ISO 9001:2000) and Quality systems Model for quality assurance in design, development, production, installation and servicing (based on ISO 9001:1994) 2 EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts
