1、CEN PRENU28b7 92 3404589 003l13b2 750 Edition approved for publication Comments should be sent within six months after the date of publication decision 88. Bd Maleslierbec 75008 PARIS - FRANCE 1992-08-31 AECMA A. E. C. M. A. STAN DAR D prEN 2867 NORME A.E.C.M.A. Issue P 1 A.E.C.M.A. NORM August 1992
2、 EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AEROSPATIAL 88. boulevard Maleslierbec. 75008 PARIS - TEL 45-63-82-85 C3 Chairman Mr. ARENA UDC : Key words : ENGLISH VERSION Aerospace series Nuts, anchor, self-locking, floating, one lug, with counterbore, in heat resisting steel, Mo
3、s2 lubricated (at ambient temperature) / 31 5 OC Classification : 1 1 I O MPa Srie arospatiale Luft- und Raumfahrt crous river, freinage interne, flottants, simple patte, avec chambrage, en acier rsistant chaud, lubrifis Mos2 ( temprature ambiante) / 31 5 OC Gehause-Annietmuttern, selbstsichernd, be
4、weglich, einseitiger Flansch, mit zylindrischer Aussenkung, aus hochwarmfestem Stahl, Mos2 geschmiert (bei Raumtemperatur) / 31 5 OC Classification : 1 11 O MPa Klasse : 1 11 O MPa This Aerospace Series. pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Cons
5、tructeurs de Matriel Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approved b y the experts of the concerned Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not
6、 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 Member countries it will be submitted
7、as a draft European Standard to CEN (European Committee for Standardization) for final vote. COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCEN PREN*Z867 92 W 3404589 0033363 697 prEN 2867 Page 3 1 Scope and field of application This s
8、tandard specifies the characteristics of one lug, floating anchor nuts with counterbore and self-locking feature achieved by forming the upper portion out of round, in heat resisting steel, MOS, lubricated, classification 1 100 MPa / 315 OC 2). 2 References IS0 3224 IS0 5855-2 IS0 5858 IS0 8788 EN 2
9、000 EN 2398 EN 2399 EN 2424 EN 2491 EN 3042 EN 3638 EN 3639 TR 3791 Aerospace - Self-locking, floating, single-lug anchor nuts, with counterbore - Classification 1 100 MPa / 235 OC Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts Aerospace - Self-locking nuts with maximum operat
10、ing temperature less than or equal to 425 OC - Procurement specification Aerospace - Fasteners - Tolerances of form and position for nuts Aerospace series - Quality assurance - EN aerospace products - Approval of the quality systems of manufacturers Heat resisting steel FE-PA92-HT - Rm 2 900 MPa - B
11、ars for machined bolts D I 25 mm - Aerospace series 3, Heat resisting steel FE-PA92-HT - Rm 2 900 MPa - Bars for forged bolts D I25 mm - Aerospace series 3, Aerospace series - Identification marking of standard fasteners 3, Aerospace series - Molybdenum disulphide dry lubricants - Coating methods 4,
12、 Aerospace series - Quality assurance - EN aerospace products - Qualification procedure Aerospace series - Heat resisting steel FE-PA92HT - Solution treated - Sheet and strip - a I 3 mm 4) Aerospace series - Heat resisting steel FE-PA92HT cold worked and softened - Bars and wires for continuous cold
13、 forging or extrusion of fasteners - 3 mm I D 5 30 mm - R, 2 900 MPa 4, Aerospace series - Materials for all metal self-locking nuts and thin wall inserts of temperature classes I425 OC 5, 1) Corresponds to strength class of the associated bolt, the 100 per cent load of which it is able to withstand
14、, when tested at ambienftemperature, without breaking or cracking. 2) Maximum temperature that the nut is able to withstand, without permanent alteration to its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by the surface treatment. 31
15、Published as AECMA standard at the date of publication of the present standard 4) In preparation at the date of publication of the present standard 5) Published as AECMA technical report at the date of publication of the present standard Previous page is blank COPYRIGHT Association Europeene Des Con
16、structeurs de Materiel AerospaceLicensed by Information Handling Services_- CEN PREN*Zb7 92 W 3404589 0031364 523 W prEN 2867 Page 4 3 Required characteristics 3.1 See figure 1 and table 1, Dimensions and tolerances are : in conformity with IS0 3224, expressed in millimetres and apply before Mos2 lu
17、brication. 3.2 Materials EN 2398, EN 2399, EN 3638, EN 3639 or TR 3791 3.3 Surface treatment EN 2491, thickness not specified Configuration - Dimensions - Masses COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCEN PRENr28b7 92 = 3404589
18、 00313b5 4bT Break sharp edges 0,l to 0.4 i - . I j- W I - j- I I c Y-Y 2-4 prEN 2867 Page 5 lrernatives : counlersunk rivet holes (when specified by purchaser) may he dimpled or cut countersunk (al manufac twers opt ion1 Bearing face of the nut - - w Detail X Radius or chamfer IlThese values, in mi
19、crometres, apply before surface treatment. The values do not apply to threads and sheared edges the surface texture of which will be achieved by usual manufacturing methods. 2) Tooling marks are permitted in this area. Details of form, not stated, are at tne manufacturers option. Tolerances of form
20、and position shall be in conformity with IS0 8788, Figure 1 -7-T min. min. max. - K max. 11 12 13.5 16 18 - - - - Table 1 32.7 9.9 1.1 9.5 36.7 12 erances apply before forming out o round. 11. miax. I- 5 I 3.5 float miri. +-i+ 6.6 kg/1000 pieces approx. 141 Ijimeter code 030 does not include counter
21、bore. COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling ServicesCEN PREN*2Bb7 92 W 3404589 0031366 3Tb W prEN 2867 Page 6 4 Designation Example : I identity block I Description block O _- Number of this standard Diameter code (see table 1 I Hole
22、code (see table 2) Table 2 Note : If necessary, the originator code 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style N. See figure 1, 6 Technical specification IS0 5858 except for : - approval of manufacturers : EN 2000 - qualification of nuts : EN 3042 COPYRIGHT Association Europeene Des Constructeurs de Materiel AerospaceLicensed by Information Handling Services
