1、AECMA STANDARD NORME AECMA AECMA NORM prEN 2809 Edition P 3 September 2001 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION (AECMA-STAN) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: Supersedes edition P 2 September 1996 Descri
2、ptors: ENGLISH VERSION Aerospace series Nuts, hexagon, slotted I castellated, reduced height, normal across flats, in heat resisting steel, silver plated Classification : 900 MPa (at ambient temperature) I650 OC Srie arospatiale Ecrous hexagonaux crneaux, hauteur rduite, surpiats normaux, en acier r
3、sistant chaud, argents Classification : 900 MPa (a temprature ambiante) / 650 OC Luft- und Raumfahrt Flache Kronenmuttern, mit normaler Schlsselweite, aus hochwarmfestem Stahl, versilbert Klasse : 900 MPa (bei Raumtemperatur) / 650 OC Subsequent to the publication of extent that interchangeability i
4、s Aft er examina ti not be changed to an re-identification of the ement of AECMA-STAN it will be submitted as a I Replace page I of the previous edition by this- Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX Withdr
5、awal approved 2001-09-28 Mechanical Domain I Comments should be sent within six months after the date of Dublication to AECMA-STAN Gulledelle 94 Mr Feltham 8-1200 BRUXELLES 0 aecma 200 STD-AECMA PREN 2807-ENGL L99b LOL23LL U0120b0 482 Page 3 prEN 2809 : 1996 I Scope This standard specifies the chara
6、cteristics of hexagonal slotted / castellated nuts, reduced height, normal across flats, in heat resisting steel, silver plated. Classification : 900 MPa 1) / 650 OC 2) 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These
7、normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated
8、references the latest edition of the publication referred to applies. IS0 5855-2 Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts IS0 8788 Aerospace - Fasteners - Tolerances of form and position for nuts IS0 91 39 Aerospace - Plain or castellated nuts - Procurement specification
9、 3) IS0 961 8 Aerospace - Nuts, hexagonal, slotted (castellated), reduced height, normal across flats, with MJ threads, classifications : 450 MPa (at ambient temperature) / 120 OC - 450 MPa (at ambient temperature) / 235 OC - 600 MPa (at ambient temperature) / 425 OC - 900 MPa (at ambient temperatur
10、e) / 235 OC - 900 MPa (at ambient temperature) / 31 5 OC - 900 MPa (at ambient temperature) / 650 OC - 1 100 MPa (at ambient temperature) / 235 OC - 1 100 MPa (at ambient temperature) / 730 OC - 1 250 MPa (at ambient temperature) I 600 OC - Dimensions 3) EN 2000 Aerospace series - Quality assurance
11、- EN aerospace products - Approval of the quality system of manufacturers EN 2367 Aerospace series - Split pins in steel EN 2573 EN 2424 Aerospace series - Marking of aerospace products EN 2786 Aerospace series - Electrolytic silver plating of fasteners 4) TR 3823 Aerospace series - Materials for pl
12、ain and slotted hexagonal nuts 5) 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 to withstand, without permanent altera
13、tion to its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by the dimensions. 3) In preparation at the date of publication of this standard 4) Published as AECMA Prestandard at the date of publication of this standard 5) Published as AEC
14、MA Technical Report at the date of publication of this standard Previous page is blank Page 4 prEN 2809 : 1996 3 Required characteristics 3.1 See figure 1 and table 1. Configuration - Dimensions - Masses Dimensions and tolerances are : in conformity with IS0 9618, expressed in millimetres and apply
15、after surf ace treatment. Details of form not stated are at manufacturers option. 3.2 IS0 8788 Tolerances of form and position 3.3 Materials TR 3823 3.4 Surface treatment EN 2786, thickness : - on external surfaces : 5 pm to 15 pm - on pitch diameter : 5 pm minimum for nuts MJ6 and larger. Nuts MJ5
16、and smaller shall show complete coverage over complete profile. STD-AECIA PREN 2807-ENGL Remove sharp edges 0,1 to 0,4. lb LOL23LL 00lZb2 255 x-x Page 5 prEN 2809 : 1996 Y (4:l) Form (radius or chamfer) at bottom of slot at manufacturers option Form for diameter codes 060 to 200 1) These values in m
17、icrometres apply before surface treatment. They do not apply to threads the surface texture of which will be as achieved by usual manufacturing methods. 2) This dimension also applies to upper chamfer. All forms of entry (chamfer or radius) optional within these limiting dimensions. 3) Diameter M ma
18、y be tangential to, but not intrude on the flats. 4) Dimension G applies to height below slots and height of flats (diameter codes 060 to 200). Figure 1 Table 1 2) Approximate values kgll O00 pieces), given for information purposes only 3) In conformity with EN 2367 Page 6 prEN 2809 : 1996 4 Designa
19、tion EXAMPLE : NOTE : If necessary, the code 19005 shall be placed between the description block and the identity block. 5 Marking See table 2 and figure 1. Table 2 I EN2424 Style I Diameter code I 1 040to070 I N I I 080to200 I C+MJ -1 6 Technical specification IS0 9139, except for approval of manufacturers : see EN 2000.
