AECMA PREN 2856-1989 Aerospace Series Nuts Anchor Self-Locking Fixed Closed Corner Reduced Series with Counterbore Classification 1100 MPa 235 Degrees Celsius Issue P 1《航空和航天系列 90度.pdf

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1、DRAFT FOR PUBLIC COMMENT Latest date for receipt of comments Technical Committee ACE 1 I Aerospace fasteners and fastening systems Document 8971739 DC DRAFT STANDARDS AEROSPACE SERIES Nuts, anchor, self locking, fixed, reduce series with counter bore: Classification : 1100 MPa/235OC, 90“ corner (PrE

2、N 2855), closed corner (PrEN 2856). This draft is now available for public comment and your views and technical comments on it would be appreciated. If you have no specific comments to make but find it generally acceptable it would be helpful if you would notify US accordingly. Suggestions entailing

3、 revision of the text should indicate the preferred wording. Please quote the relevant clause number against any comment. The Co-ordination of the requirements of this draft with those of any related standards is of particular importance and you are invited to point out any areas where this may be n

4、ecessary. All comments should be sent to the Conmittee Secretary Mr, B. Wakeford at the London/?iG%XKaEm address below. The comments received will be passed to the committee concerned for their consideration; no acknowledgement will normally be sent. Requests for further copies of this draft should

5、be sent to: Keynes MK14 6LE. ith an addressed label, Orders not accompanied by a remittance will be subject to a delay. THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD Head Office 2 Park Street London WU 2BS Telephone 01-629 9000 Telex 266933 BSILON G Head Office 825777 BSIMK

6、G Sales the dimensions and toJerances shall conform to the values shown in the figue and in the table, after cadmium plating but before MOS The dimensions are in coni ith IS0 9156 and the eometrical golerances with IS0 8788. rcato* 2 Details of form not defined are at bhe option of the manufacturer.

7、 4.2. Surface roughness See figure. Values apply prior to cadmium plating and uiation They do not apply eo the thread, sheared edges and punched edges ; the surface roughness will be as achieved by normal methods of manfactuKe 4.3 Materials Steel EN 2542 or EN 2543. 4-4 Surface treatement Cadmium pl

8、ating EN 2133, 5jm mnimum on the threads and ab1 areas which can be contacted by a 20 mm diameter ball. Un ali other areasB a ntinuou deposit shall be present, but no minimum value is specified. Lubrication by Mos2 EN 2491, mandatory on threads, optionaP on other surfaces. t Copyright Association Eu

9、ropeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 2855 Page 5 Issue P I a Group of 2 holes 2,5 + 82 2 holes, Figure - onfiguration Table - Dimensions and mass Dimensions in

10、 millimetres 1) In conformity with IS0 5855 part 2. In the self-locking zone, the tolerances opply 2) Is to sharp corners (chamfered) or point of tangency (radiused). 3) Is applicable at the rivet hole location. before deformation. Copyright Association Europeene des Constructeurs de Materiel Aerosp

11、atial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 2855 Page 6 Issue P 1 5 DeSigXlatiQE Each nut shall only be designated ab in the follwig exanpie Deceription block Identity block EN21 I_ O60 = Thread code (see table

12、) I Hte : If necessary the originator eode 19005 may be oau ewee Lhe description block and the fdetity block. Each nut shall be rked in any of ehe positions shown on ehe fi an with EN 2424, style Eu. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under lice

13、nse with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-issue P 1 EDITE PAR ASOCIATIO the ienins and tolerances shall conform to the values shown in the figure and in the table, after cadmium plating but before HoS The dimensions are in conformity with IS0 32

14、22 and the with IS0 8788, lubiaon 2 Dtails of form not defined are at the option of the 4.2. Surface roughness See figure. Values apply prior to cadmium platirtg and iatin They do not apply to the thread, sheared edges and punche edges ; the surface roughness will be as achieved by normal methods of

15、 manufacture. 4.3 Piaterials Steel EN 2542 or EN 2543. 4.4 Surface treaternent Cadmium plating EN 2133, 5pm ni on the threads and all areas which can be contacted by a 20 mm diameter ball. On all other areas, a oQus shall be present, but no mi ni mu value is specified. Lubrication by MOS EN 2491, ma

16、ndatory on threads, optional on other surfaces. 2 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 2854 Page 5 Issue P a. Pai in . t imnsion$ in mi

17、llimetres - I) in conformity with IS0 5855 part 2, In the self-locking zone, the tolerances apply before deformation. 2) Is to sharp corners (chamfered) or point of tangency (radiused). 3) Is applicable at the rivet hole location. Copyright Association Europeene des Constructeurs de Materiel Aerospa

18、tial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-FrEN 2856 Page 6 Issue P 1 Number of E%; stndar O60 = Thread ceGe (see table) Note . ff ilocrss3ry the originator code H9G05 nay be toa bw the description block and the ide

19、ntity block Each nut shall be rnarkeci xn ary or the posftions shown on the ffgure fn accordance with ER 2424, s%yle RB Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-