1、A.E.C.M.A. STANDARD NORME A.E.C.M.A. A.E.C.M.A. NORM Edition approved for publication Comments should be sent within six months after the date of publication decision 1991-03-01 A.E.C.M.A. 88, Bd. Malesherbes -7 75008 PARIS - FRANCE prEN 3706 Issue P 1 March 1991 C8 Chairman Mr. WILLIAMS 7 DITE PAR
2、LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88, boulevard Malesherbes, 75008 PARIS -TL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Headless threaded plugs, cross recess, in aluminium alloy 5086 Srie arospatiale Bouchons filets, sans tte, empreinte cruciforme, e
3、n alliage daluminium 5086 Luft- und Raumfahrt Verschlupschraube ohne Kopf mit Kreuzschlitz, aus Aluminiumlegierung 5086 This Aerospace Series pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green pap
4、er for the needs of AECMA-Members. It has been technically approved by 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 be changed to an extent that interchangeability is affected, p
5、hysically 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 Committee for Sta
6、ndardization) for final vote. -. aecma 1991 CEN PRENr370b 91 3404589 0011923 8 / prEN 3706 Page 3 1 Scope and field of application This standard specifies characteristics of headless threaded plugs, cross recess, in aluminium alloy 5086, for aerospace purpose. 2 Keferences IC0 5855-1, Aerospace - MJ
7、 Threads - Part 1 : General requirements IC0 965-3, IS0 general purpose metric screw threads - Tolerances - Fart 3 : Deviations for constructional threads EN 2424, EN 2699, Aerospace series - Aluminium alloy (5086) - Annealed and straightened Aerospace series - Identification marking of standard fas
8、teners 1) (H 111) - Drawn bar - 6 D 50 mm 1) Aerospace series - Headless threaded plugs - Installation holes 2) - EH 3707, 3 Required characteristics 3.1 Configuration : See figure. Dimensions and tolerances : - see figure and table ; - dimensions are in mi2limetres. 3.2 Material EN 2699 Configurati
9、on - Dimensions - Tolerances 1) fiiblished as AECMA standard at the date of publication of the present standard 2) Publ.ished as AECMA pre-standard at the date of publication of the present standard I , Y -_ Previous page -=. is blank VEN ,7706 Page 4 Dia. OD 11 L z 0A code f0,25 O O 060 MJ6xl ,O0 -
10、 4g5g 6 o15 3 070 MJ7xl ,O0 - 4g5g 7 018 4 080 MJ8xl ,O0 - 4g5g 8 018 5 100 MJlOxl ,O0 - 4g5g 8 018 6 120 MJI2xl ,O0 - 4959 8 112 6 140 MJ14xl ,O0 - 4g5g 8 112 7 160 MJI6_1,00 - 4959 10 112 7 200 MJ20xl ,O0 - 4959 1 O 112 7 +0,3 +0,3 180 MJ18xl ,O0 - 4g5g 10 112 7 CEN PREN*370b 91 M 3404589 OOLL924
11、T I B C X Y +0,2 +0,3 min. min. O -0,l O,8 019 1,56 0,4 O,6 1 114 I ,84 0,12 115 211 2,55 1,34 1,34 115 211 2,55 2 237 3,28 134 2 217 3,28 1,54 1,54 2 2,7 3,28 2 2,7 3,28 134 I-_ 1 1 1,84 - - ._I_ _. ._ Thread surface will be achieved by normal methods of manufacturing. 0D 1 L +k- 0,5 to 0,7 t5 120
12、0 Ox Table 1 Y Detail I Break sharp edges Oll to 0,3 See &tait I - t 0,2 R=0,5 O Figure 1 ,7 i- prEN 3706 Page 5 4 Jlesignation Examph : Pescrip tio 11 b Lock Prm Identity block EN3706-080 Nuinber of the stand.ard !)innieter code (see table) I Note : If necessary, the originator code I9005 shalJ. be placed between the description block and the identity block. 5 Piarking Accordi.tiq to EN 2424, category G G Inctdhtion hol-es See EN 3707
