1、STD-AECMA PREN 4322-ENGL 2999 LO12321i 0015873 ObT Edition approved for publication 1999-01 -29 AECMA STANDARD NORME AECMA AECMA NORM Comments should be sent within six months after the date of publication to AECMA Gulledelle 94 8-1 200 BRUXELLES prEN 4321 Edition P 1 January 1999 PUBLISHED BY THE E
2、UROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 ICs: 49.030.20 Descriptors: Aircraft industry, double hexagonal head screw, nickel alloy, heat resistant material, silver coating, classification, dimension, surface
3、 treatment, designation ENGLISH VERSION Aerospace series Bolts, double hexagon head with lockwire holes, relieved shank, long thread, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), silver plated Classification: 1 550 MPa (at ambient temperature) i 650 “G Srie arospatiale Luft- und Raum
4、fahrt Vis tte bihexagonale avec trous de fil frein, ft dgage, filetage long, en alliage rsistant chaud base de nickel NI-PH2601 (Inconel 718), Classification: 1 550 MPa ( temprature ambiante) I650 “C Zwlfkantschrauben mit Lcher fr Sicherungsdraht, Dnnschaft, langes Gewinde, aus hochwarmfester Nickel
5、basislegierung NI-PH2601 (Inconel 718), Klasse: 1 550 MPa (bei Raumtemperatur) I 650 “C argentes versilbert This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECM
6、A-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 interchangeability is affected, physically or fun
7、ctionaily, without re-identification of the standard. Affer examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Sewices of the Member countries it wi/ be submitted as a draff European Standard to CEN (European Committee for Standardization) for
8、formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 92138 ISCY-LES-MOULINEAUX CEDEX C8 Chairman Mt Feltham aecma 1999 STD-AECMA PREN 4321-ENGL 1999 = 303233l 0035874 TTb Page 3 prEN 4321: 1999 I Scope This standard specifies the characteri
9、stics of double hexagon headed bolts with lockwire holes, relieved shank and long thread, in NI-PH2601, silver plated, for aerospace applications. Clascification: I 550 MPa 1) / 650 “C 2) 2 Normative references IS0 3353 IS0 4095 IS0 5855-2 EN 2424 EN 2786 EN 2952 EN 3666 EN 3833 Aerospace - Rolled t
10、hreads for bolts - Lead and runout requirements Aerospace - Bihexagonal drives - Wrenching configuration - Metric series Aerospace - MJ threads - Part 2: Limit dimensions for bolts and nuts Aerospace series - Marking of aerospace products Aerospace series - Electrolytic silver plating of fasteners 3
11、) Aerospace series - Heat resisting alloy NI-PH2601 - Solution treated and cold worked - Bar for forged fasteners - D I50 mm - 1 270 MPa I Rm I 1 550 MPa 3) Aerospace series - Heat resisting alloy NI-PH2601 - Solution treated and cold worked - Bar for forged fasteners - D I 50 mm - I 550 MPa 5 Rm I
12、1 830 MPa 3) Aerospace series - Bolts, MJ threads, in heat resisting nickel base alloy NI-PH2601 (Inconel 718) - Classification: 1 550 MPa (at ambient temperature) / 650 “C - Technical specification 3) 3 Required characteristics 3.1 See figure 1 and tables 1 and 2. Dimensions and tolerances are in m
13、illimetres. They apply after silver plating. Configuration - Dimensions - Tolerances - Masses 3.2 Material EN 3666 or EN 2952 with exception of final heat treatment which shall meet EN 3666 (reference heat treatment and relating mechanical properties). 3.3 Surface treatment EN 2786 Thickness: - thre
14、ad: 3 pm to 6 pm, shall be measured at the pitch diameter; - other areas may show complete coverage, without thickness requirement. 1) Minimum tensile strength of the material at ambient temperature 2) Maximum test temperature of the parts 3) Published as AECMA Prestandard at the date of publication
15、 of this standard Previous page is blank STD-AECMA PREN 4321-ENGL 1999 = 1012311 00B5875 932 = Page 4 prEN 4321 : 1999 Rolled 37 oq y- Values apply before silver plating. Remove sharp edges 0,l to 0,4. I +-II I I I Shape in this area at manutac turers option +10,4 I CI I C2 1 4 holes M deburred 1) W
16、hen the length of the shank is less than one times the nominal value of the shank diameter D, the run-out is measured at a distance equal to half the actual shank length. 2) For bolts having a shank length less than one times the nominal value of the shank diameter O, and for those threaded to head,
17、 the pitch diameter axis shall be used as the datum. Figure I STD.AECMA PREN 432L-ENGL 1777 H LOL23LL 00L587b 8-77 D Thread a D E FG Code Designation +_ 0,13 max. min. min. 050 MJ5x0,8-4h6h 4,48 9,l 8,3 6,8 060 MJ61-4h6h 5,35 10,6 9,8 7,8 . Table 1 100 120 MJlOx1,254h6h 9,19 16,7 15,7 11,8 MJl2x1,25
18、4h6h 11,19 19,9 18,8 13,7 I 070 IMJ7x1-4h6h 1 6,35 I 12,l I 11,3 I 8,8 Q 0,5 3,4 42 5,2 692 7,9 9,8 RI Sb T U V X Y z max. min. min. max. min. rnax. min. 0,5 0,3 72 2,9 2,5 3,7 3,2 0,13 8 2,3 3,2 2,8 4,6 4,l 0,15 0,7 0,5 9 2,6 3,7 3,3 5,4 4,9 0,18 0,12 0,003 10 2,8 4,l 3,7 5,7 5,2 0,15 0,2 0,8 12 3,
19、l 5,l 4,7 7,2 6,7 0,25 0,9 0,0025 14 3,5 6 5,6 8,5 8 0,18 0,3 016 Page 5 prEN 4321: 1999 I I I I 1,2 6,15 + 1,4 6,65 1,6 I 7,15 2 I 8,15 6,85 7,85 I I 2,4 9,35 9,05 7,4 _ STD*AECMA PREN 4323-ENGL 1999 1032331 0035877 705 = Page 6 prEN 4321: 1999 m u) v) i! E E i .- 5 - E m u) u) i! K E x .- 3: - 2 m
20、 u) 3 B i E 5 - i .- 2 m v) u) E E 5 - x .- E m v) u) z E E x .- 3 - 2 2: m c III 9 o +-t+ m STD.AECMA PREN 4321-ENGL 1999 m LO12311 OOL5B7B 641 Page 7 prEN 4321 : 1999 STD-AECMA PREN 4321-ENGL 1997 ZU12321 0015479 588 Page 8 prEN 4321 : 1999 4 Designation EXAMPLE: Description block Identity block E
21、N721 -080060 Number of this standard Thread code (see table 1) Length code (see table 2) NOTE: If necessary, the code 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style see table 3 and as indicated on figure 1. Table 3 I Threadcode I Style I 050 C I 060 to 120 I A I 6 Technical specification EN 3833
