1、 STDSAECMA PREN 4267-ENGL 1777 = 1012311 0013309 875 9 Edition approved for publication AECMA STANDARD prEN 4269 NORME AECMA Edition P 1 AECMA NORM July 1997 Comments should be sent within six months after the date of Dubiication to C3 Chairman PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDU
2、STRIES (AECMA) Gulledelle 94 - 6-1 200 BRUXELLES - Tel. +32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs : 49.040.20 Descriptors : ENGLISH VERSION Aerospace series Nuts, anchor, self-locking, floating, two lug, reduced series, with counterbore, in steel, cadmium plated, MOS, lubricated Classification :
3、 1 100 MPa (at ambient temperature) I 235 OC Srie arospatiale crous river, freinage interne, flottants, double patte, srie rduite, avec chambrage, en acier, cadmis, lubrifis MOS, Classification : 1 100 MPa ( temprature ambiante) I235 OC Luft- und Raumfahrt Annietmuttern, selbstsichernd, beweglich, b
4、eiderseitiger Flansch, mit zylindrischer Aussenkung, aus Stahl, verkadmet, Mos,-geschmiert Klasse : I 100 MPa (bei Raumtemperatur) I 235 OC This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on g
5、reen paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee following comment by the Member countries. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeabilit
6、y 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 as a draft European Standard to CEN (European C
7、ommittee for Standardization) for formal vote. 1997-07-31 AECMA Gulledelle 94 B-1200 BRUXELLES Mr Arena STD-AECMA PREN 42bq-ENGL 1797 1012311 O013310 597 M Page 3 prEN 4269 : 1997 1 Scope This standard specifies the characteristics of self-locking, floating, two lug anchor nuts, reduced series, with
8、 counterbore, in steel, cadmium plated, Mos2 lubricated. Classification : 1 1 O0 MPa 1) / 235 “C 2) 2 Normative references IS0 5855-2 IS0 5858 IS0 8788 IS0 7332 Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts Aerospace - Self-locking nuts with maximum operating temperature less
9、 than or equal to 425 “C - Procurement specification Aerospace - Fasteners - Tolerances of form and position for nuts Metric fasteners for aerospace construction - Nuts, anchor, self-locking, floating, two lug, reduced series, with ounterbore - Strength classification : 1 1 O0 MPa - Maximum operatin
10、g temperature 235 “C Aerospace series - Quality assurance - EN aerospace products - Approval of the quality system of manufacturers Aerospace series - Cadmium plating of steels with maximum specified tensile strength equal to or less than 1 450 Mpa, copper, copper alloys and nickel alloys 3) Aerospa
11、ce series - Marking of aerospace products Aerospace series - Molybdenum disulphide dry lubricants - Coating methods 3, Aerospace series - Quality assurance - EN aerospace products - Qualification procedure Aerospace series - Materials for all metal self-locking nuts and thin wall inserts of temperat
12、ure classes s 425 “C 4) EN 2000 EN 2133 EN 2424 EN 2491 EN 3042 TR 3791 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 t
13、o withstand, without permanent alteration to its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by the surface treatment. 3) Published as AECMA Standard at the date of publication of this standard 4) Published as AECMA Technical Report a
14、t the date of publication of this standard Previous page is blank STD-AECMA PREN q2bS-ENGL 2997 D LO12321 0023322 Y23 D Page 4 PrEN 4269 : 1997 3 Required characteristics 3.1 See figure 1 and table 1. Dimensions and tolerances are : in conformity with IS0 7323, expressed in millimetres and apply ate
15、r cadmium plating but before Mos2 lubrication. Details of form not stated are at the manufacturers option. Configuration - Dimensions - Masses The cap shall remain joined (type of attachment at the users discretion) to the nut at the maximum operating temperature. See test conditions in IS0 5858. 3.
16、2 Tolerances of form and position IS0 8788 3.3 Materials TR 3791 3.4 Surface treatments EN 2133, 5 pm min. on threads and all surfaces which can be contacted by a 20 mm diameter ball. On all other surfaces, a continuous deposit shall be present. EN 2491, thickness not specified STD-AECMA PREN 42b7-E
17、NGL 1797 10L2311 O013312 3bT Page 5 prEN 4269 : 1997 W Dl a U c c W s d QI U W U a QI L c k a E! f 2 3 c O .- c L 3 ul t .- .e - N X Y .- $1 3 U I I 7 I STD-AECMA PREN LiZbS-ENGL 2777 3032312 0033333 2Tb Page 6 PrEN 4269 : 1997 L IC u lw C C - E g 5 .- 8 E c c Q s s C .- L C CJ .- F STD.AECMA PREN 4
18、2b-ENGL L797 m 10123L1 0013314 132 9 Plain rivet holes + cap Page 7 prEN 4269 : 1997 B 4 Designation EXAMPLE : Description block I Identity block NUT I EN4269-060 Number of this standard IIT Rivet hole and cap code (see table 2) Diameter code (see table 1) NOTE : If necessary, the code 19005 shall be placed between the description block and the identity block. Table 2 Option I Code I - (hyphen) Plain rivet holes I 5 Marking EN 2424, style N. See figure 1. 6 Technical specification IS0 5858, except for : - Approval of manufacturers : see EN 2000 ; - Qualification of products : see EN 3042.
