1、CEN PREN*Zbb 92 3404589 0031357 373 Edition approved for publication 1992-08-31 A. E.C. M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM Comnients should be sent within six montlis after the date o publication decision A E.C.M A 88. Bd Malesherbes 75008 PARIS - FRANCE prEN 2866 Issue P 1 August 1992
2、 EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AEROSPATIAL 88. boulevard Malesherbes, 75008 PARIS - TEL 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Nuts, anchor, self-locking, floating, one lug, with counterbore, in steel, cadmium plated, Mos2 lubricated (at ambi
3、ent temperature) / 235 OC Classification : 1 i i O MPa Srie arospatiale Luft- und Raumfahrt crous river, freinage interne, flottants, simple patte, avec chambrage, en acier, cadmis, lubrifis Mos2 Classification : 1 110 MPa ( temperature ambiante) / 235 OC Gehause-Annietmuttern, selbstsichernd, beweg
4、lich, einseitiger Flansch, mit zylindrischer Aussenkung, aus Stahl, verkadmet, Mos2 geschmiert Klasse: 1 110 MPa (bei Raumtemperatur) / 235 OC This i(2866 92 m 3404589 0031358 22T prEN 2866 Page 3 1 Scope and field of application This standard specifies the characteristics of one lug, floating ancho
5、r nuts with counterbore and self-locking feature achieved by forming the upper portion out of round, in steel, cadmium plated, MOS, lubricated, classification 1 100 MPa ) / 235 2). 2 References IS0 3224 IS0 5855-2 IS0 5858 IS0 8788 EN 2000 EN 2133 EN 2424 EN 2491 EN 2542 EN 2543 EN 3042 TR 3791 Aero
6、space - 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 operating temperature less than or equal to 425 OC - Procurement specification
7、 Aerospace - Fasteners - Tolerances of form and position for nuts Aerospace series - Quality assurance - EN aerospace products - Approval of the quality systems of manufacturers Cadmium plating of steels with maximum specified tensile strength equal to or less than 1 450 MPa and copper and copper al
8、loys - Aerospace series 3, Aerospace series - Identification marking of standard fasteners 3, Aerospace series - Molybdenum disulphide dry lubricants - Coating methods 4, Aerospace series - Steel FE-PL43S - Annealed - Bar and wire De I 40 mm for prevailing torque nuts 5) Aerospace series - Steel FE-
9、PL43S - Annealed - Sheet and strip 0,3 I a 2 2 mm for prevailing torque nuts 5) Aerospace series - Quality assurance - EN aerospace products - Qualification procedure Aerospace series - Materials for all metal self-locking nuts and thin wall inserts of temperature classes 5 425 OC 1 ) Corresponds to
10、 strength class of the associated bolt, the 1 O0 per cent load of which it is able to withstand, when tested at ambient temperature, without breaking or cracking. 2) Maximum temperature that the nut is able to withstand, without permanent alteration to its original characteristics, after ambient tem
11、perature has been restored. The maximum temperature is conditioned by the surface treatment. 3) 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 pre-standard at the date of public
12、ation of the present standard 6) Published as AECMA technical report at the date of publication of the present standard Previous page is blank _ -_ - CEN PREN*Z8bb 92 a 3404589 003iY 37 “ Break sharp edges 0.1 to 0.4 i _J 1 iw I i Y-Y h! -A M 4-v this area to achieve K Float inclusive I prEN 2866 Pa
13、ge 5 Alterna lives : counlersurik rivet holes (when specif ied by purchaser) may be dimpled or cut countersunk!at manuf oc turers option) , /; , Bearing face of the nut - Y./ De tail X Radius or chamfer 1) These values, in micrometres, apply before surface treatment. The values do not apply to threa
14、ds and sheared edges the surface texture of which will be achieved by usual manufacturing methos. 2) Tooling marks are permitted in this area. Details of form, not stated, are at the manufacturers option. Tolerances of form and position shall be in conformity with IS0 8788. Figure 1 Table 1 1) In co
15、nformity with IS0 5855-2. In the self-locking zone the tolerances apply before 21 Is to sharp corners (chamfered) or point of tangency (radiusedl. 3) Is applicable at the rivet hole location. 3,5 2.5 -I mning out of round. 4) Diameter code 030 doos not include counterbore. I -. - CEN PRENr28bb 92 34
16、04589 0033363 814 = prEN 2866 Page 6 Description block 4 Designation Example : Identity block NUT Number Hole code of (see this table standard 2) i Diameter code (see table 1 I Table 2 I 1 Option Code 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
