1、A. E.C.M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM prEN 3294 Issue P 1 October 1989 DIT PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATRIEL AEROSPATIAL 88, boulevard Malesherbes, 75008 PARIS -TL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Bolts, T-head, close tolerance
2、 heat resisting nickel base alloy NI-PIO1 HT (Waspaloy), uncoated for increased height nuts Classification : 121 O MPa/730 OC Srie arospatiale Luft- und Raumfahrt T- Kopf - Papschrau ben aus hochwarmfester Nickelbasislegierung NI-PI O1 HT (Waspaloy), blank fr hohe Muttern Klasse : 121 O MPa/730 OC
3、Vis de prcision tte anti-rotation T en alliage rsistant chaud base de nickel NI-PI O1 HT (Waspaloy), non revtu pour crou renforc Classification : 121 O MPa/730 OC This Aerospace Series pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matrie
4、l Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approvedby 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 ext
5、ent that interchangeability 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 S
6、tandard to CEN (European Committee for Standardization) for final vote. Nata - Extra copies can be supplied by B.N.A.E. - 8, rue Moreau-Vauthier - 921 O0 BOULOGNE-BILLANCOURT Edition approved for publication Comments should be sent within six months C8 Chairman after the date of publication decision
7、 Mr. WILLIAMS I A.E.C.M.A. I 88, Bd. Malesherbes 5th October 1989 75008 PARIS - FRANCE 0 aecma 1989 AECMA PREN3Z7i1 87 M LO&-Wl c1005271 7 I prEN 3294 Page 3 1 Scope and field of application This standard specifies the dimensions of uncoated T-head bolts, close tolerance, with MJ- thread, thread len
8、gth for increased heigth nuts, in heat resisting nickel base alloy NI-PlOlHT for aerospace applications. Maximum test temperature of the parts is 730 OC. These bolts are to be used in aerospace fastening systems mainly stressed in shearing force. 2 References IS0 3353 Aerospace construction - Rolled
9、 threads - Runout and lead threads IS0 5855/1 Aerospace - MJ threads - Part 1: General requirements IS0 5855/2 Aerospace - MJ threads - Part 2: Limit dimensions for bolts and nuts EN 2424 Aerospace series - Identification marking of standard fasteners 1) EN 2582 Aerospace series - Bolts in heat resi
10、sting nickel base alloy NI-PlOlHT (Waspaloy) - Classification: 1210 MPa/730 OC - Technical specification 2) EN 2959 Aerospace series - Heat resisting nickel base alloy NI-PlOlHT - Solution treated and cold worked - Bar for hot upset forging for fasteners 36 D S 30 mm 2) Aerospace series - Heat resis
11、ting nickel base alloy NI-PlOlHT - Cold worked and softened - Bar and wire for continuous forging or extrusion for fasteners - 36 D c I I+l O, ZSlBk- E )i 3 I+lO,lZlB Break sharp edges 0.1 ta 0.4 Figure - Configuration Table 1 - Dimensions Dimensions in millimetres Code Description C D E K Q R S X Y
12、 4) max. min. f7 max. min. max. min. t 0,5 max. min. max. min. O50 MJ5xOJ8-4h 6h 5) 6,3 6,l 5 11,6 11,l 3,4 2,9 3,5 0,5 0,3 8,4 8,l 060 MJ6x1-4h 6h 5) 7,3 7,l 6 12,5 12,O 3,9 3,4 4,2 0,7 0,5 9,5 9,2 070 MJ7x1-4h 6h 5) 8,4 8,2 7 13,9 13,4 4,5 4,O 5,2 0,7 0,5 10,5 10,2 O80 MJBx1-4h 6h 5) 9,4 9,2 8 14,
13、5 14,O 5,O 4,5 6,2 0,7 0,5 11,5 11,2 0,15 100 MJ10x1.25-4h 6h 5) 11.2 11.0 10 17.0 16.5 5.8 5.3 7.9 0.8 0.6 13.3 13.0 0.0015 0,12 0,002 - 1) When the length of the shank is less than one time the nominal value of the shank diameter, D, the run-out is 2) Total strainghtness with reference to nominal
14、length N. 3)For bolts having a shank length less than one time the nominal value of the shank diameter, D, the pitch 4) According to IC0 5855 / 1 and 2. 5) The tolerance on the thread major diameter shall be modified as shown in the figure. measured at a distance equal to half the actual shank lengt
15、h. diameter axis shall be used as datum. I 050 I 060 I 070 1 loo I Nominal diameter code AE-CAA PREN329Y 1OL_2311 00_05_2_93_ O E . prEN 3294 Page 5 Table 2 - Lengths and masses Masses (8,25 kg/dm): kg/1000 parts Dimensions in millimetres t AECMA PREN3274 87 a L0223LL 0005274 2 El prEN 3294 Page 6 4
16、 Designation Each T-head bolt, close tolerance, shall only be designated as in the following example: Description block BOLT Iden ti ty block EN 3,29 4-0 y O O 5f Number of EN-standard 080 = Nominal diameter code -0 (see 050 = table Length 1) 2) code * Note - If necessary, the design code I9005 may be introduced between the description block and the identity block. 5 Marking Each T-head bolt, close tolerance, shall be marked in accordance with EN 2424, class A. 6 Technical specification The T-head bolts, close tolerance shall conform to the requirements of EN 2582.
