1、A. E. C. M .A. STAN DARD . NORME A.E.C.M.A. A.E.C.M.A, NORM prEN 3379 Issue P 1 October 1989 DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88, boulevard Malesherbes, 75008 PARIS - TEL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Bolts, double hexagon head,
2、 close tolerance in heat resisting nickel base alloy NI-PI O1 HT (Waspaloy), uncoated for increased height nuts Classification : 121 O MPa/730 OC Srie arospatiale Luft- und Raumfahrt Vis de prcision tte bihexagonale en alliage rsistant chaud base de nickel NI-P1 O1 HT (Waspaloy), non revtu pour crou
3、 renforc, Classification : 121 O MPa/730 OC Zwlfkant-Papschrauben aus hochwarmfester Nickelbasiclegierung NI-Pl O1 HT (Waspaloy), blank fr hohe Muttern, Klasse : 121 O MPa/730 OC This .Aerospace Series pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constr
4、ucteurs de Matriel Arospatial). It is published on green paper 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
5、 changed to an extent 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
6、a draft European Standard to CEN (European Committee for Standardization) for final vote. Nota - Extra copies can be supplied by B.N.A.E. - 8, rue Moreau-Vauthier - 92100 BOULOGNE-BILLANCOURT Edition approved for publication 5th October 1989 Comments should be sent within six months after the date o
7、f publication decision A.E.C.M.A. 88, Bd. Malesherbes 75008 PARIS - FRANCE C8 Chairman Mr. WILLIAMS aecma 1989 - - I AECMA PREN3377 7 101E!&k 000&24 ! - prEN 3379 Page 3 1 Scope and field of application This standard specifies the dimensions of uncoated double hexagon head bolts, close tolerance, wi
8、th MJ-thread, thread length for increased height nuts, in heat-resisting nickel base alloy NI-PlOlHT for aerospace applications. Maximum test temperature of the part is 730 OC. These bolts are to be used in aerospace fastening systems mainly stressed in shearing force. 2 References EO 3353 Aerospace
9、 construction - Rolled threads - Runout and lead threads IS0 4095 Fasteners for aerospace construction - Bi-hexagonal wrenching configuration 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 Aeros
10、pace series - Identification marking of standard fasteners i) EN 2582 Aerospace series - Bolts - In heat resisting nickel base alloy NI-PlOlHT (Waspaloy) - Classification: 1220 MPa / 730 OC - Technical specification 2) EN 2959 Aerospace series - Heat resisting nickel base alloy NI-PlOlHT - Solution
11、treated and cold worked - Bar for hot upset forging for fasteners 3 050 = Length code (see table 2) 1 Note - If necessary, the design code i9005 may be introduced between the description block and the identity block. 5 Marking Each double hexagon head bolt, close tolerance, shall be marked in accordance with EN 2424, class A. 6 Technical specification The double hexagon head bolts, close tolerance shall conform to the requirements of EN 2582.
