1、O e Edition approved for publication 18 January 1988 - AECMA PREN3013 88 LOl123Ll 0004674 7 _- A. E. C, M .A. STAN DARD paEN 3013 NORME A.E.C.M.A. Issue P 1 A.E.C.M.A. NORM January 1988 Comments should be sent within six months C8 Chairman Mr. WILLIAMS after the date of publication decision A.E.C.M.
2、A. 88, Bd. Malesherbes 75008 PARIS - FRANCE DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AEROSPATIAL 88, boulevard Malesherbes, 75008 PARIS - TL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Nuts, self-locking, bihexagonal in heat resisting nickel base alloy NI-PI O1
3、 HT (Waspaloy) completely silver plated Classification : 121 O MPa/730 OC Srie arospatiale Luft- und Raumfahrt crou bihexagonal, auto-freinant, Zwlfkantmuttern, selbstsichernd en acier rsistant chaud base de nickel NI-Pl O1 HT (Waspaloy) Classification : 121 O MPa/730 OC aus hochwarmfester Nickelbas
4、islegierung NI-PIO1 HT (Waspaloy) Klasse : 121 O MPa/730 OC entirement argent ganz versilbert This Aerospace Series pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs ofAECMA-M
5、embers. It has been technically approvedby the experts of the concerned AECMA Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shallnot be changed to an extent that interchangeability is affected, physically or functional
6、ly, 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 European Standard to CEN (European Committee for Standardization) for final
7、 vote. c aecma 1988 8 d) O AECMA PREN3013 88 m - 101iZ3LL 000Llb7b O = - - Issue P 1 prEN3013 Page 3 1 Scope and field of application This standard specifies the properties of bihexagonal, internally self-locking nuts, produced by deformation of one end of the nut. These nuts are intended for use in
8、 aeronautical assemblies, which are stressed mainly in tension. The material limits their use to a tensile strength level of 1210 MPa and a temperature of 730 OC. 2 References IS0 4095, IS0 5855/1, IS0 5855/2, EN 2959, EN 3220, EN 2424, EN 2786, EN 3005, Fasteners for aerospace construction - Bi-hex
9、agonal wrenching configuration Aerospace construction - MJ threads - Part 1 : Basic profile Aerospace construction - MJ threads - Part 2 : Dimensions for bolts and nuts Aerospace series - Heat resisting nickel base alloy (NI-PlOlHT) - Solution treated and cold worked - Bar for hot upset forging for
10、fasterners 3 D 30 mm 1) Aerospace series - Heat resisting nickel base alloy (NI-PlOlHT) - Cold worked and softened - Bar and wire ,or COII dimensions and tole- rances shall conform with the figure and the table. Details of form, not stated are at the manufacturers option. Dimensions apply after coat
11、ing. 3.2 Material Heat resisting nickel base alloy NI-PlOlHT to EN 2959 or ER 3220. 3.3 Surface treatment Silver coat to EN 2786, coating thickness 5 to 15 Hm, On nuts MJ6 and larger, the coating thickness shall be no less talan 5 Mm measured at the pitch diameter, Nuts IfJ5 and smaller shall show c
12、omplete coating coverage on the threads, - - Previous page i) In preparation. is,blank- _ 026 2MR108 7T4 AECMA Issue P 1 prEN3013 Page 4 YARKING AREA s- i PREN3013 BB m 1012311 OOOqb77 2 m -J 1 OR CONCAVE, BUT SHU MOT BE 6 PLACES L-jjJ REMOVE SHARP EMS 0.1 TO 0.4 1 Thread (5) i 050 MJ 5x0,8 - 4H6H D
13、esignation FORM OUT OF ROUND iH THIS AREA TO ACHIEVE THE SELF LOCKING TORWE Figure - Configuration Table - Dimensions and masses Dimensions in millimetres 160 MJ161,50-4H5H 22 1) These values do not apply to the thread. Threads surface will be as achieved by normal methods of manufacture. These valu
14、es are to be applied before silver-coating. (2) Bihexagonal wrenching configuration IS0 4095 on length N. (3) All forms of entry (radius or chamfer) optional within this limiting dimensions. (4) Wrench pad engagement (5) !Ihread according to IS0 5855. In self-locking zone the tolerances apply before
15、 forming out of round. 0262MR1087T4 P O AECMA PREN3013 88 m LOL231L 0004b78 4 II _ - Issue P 1 prEN3013 Page 5 4 Designation Each bihexagonal nut shall only be designated as in the following example : Description block Identity block NUT EN3 O 1 3 -1 I Number of EN standard 1 050 = Diameter (see table) Note : If necessary, the design code S9005 may be introduced between the description block and identity block. 5 Marking Each bihexagonal nut will be marked in accordance with EN 2424 class A. 6 Technical specification The bihexagonal nuts shall conform with the requirements of EN 3005.
