1、A. E.C. M .A. STAN DARD NORME A.E.G.M.A. A.E.C.M.A. NORM Edition approved for publication 15 May 1986 pr E N 2937 Issue P I May 1986 C8 Chairman Mr WILLIAMS Comments should be sent within six months after the date of publication decision A.E.C.M.A. 88, Bd. Malesherbes 75008 PARIS - FRANCE EDITE PAR
2、L?ASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AEROSPATIAL 88, boulevard Malesherbes, 75008 PARIS -TEL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Screws, hexagon head, thread to head, in heat resisting steel FE-PA92HT (A286) unplated Classification : 900 MPa/650 OC Srie
3、arospatiale Luft- und Raumfahrt Vis tte hexagonale, filete sous tte, en acier resistant chaud FE-PA92HT (A286) non revtu Classification : 900 MPa/650 OC Sechskantschrauben, Gewinde bis Kopf, aus hochwarmfestem Stahl FE-PA92Hf (A286) blank Klasse : 900 MPa/650 OC This standard is initially published
4、on green paper for the needs of AECMA-Members (Association Europenne des Constructeurs de Matriel Arospatial). It has been technically approved by the experts of the concerned AECMA Commission followhg comment by the manufacturers of the Member countries. After examination and signature of the AECMA
5、 Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be published in its final version on yellow paper as an AECMA Standard. prEN2937 page3 issue PI 1.Ccope and field of application. 1.1 This standard specifies the characteristics of screws wi
6、th hexagonal heads, fully threaded, in heat resisting steel FE-PA92-HT (A2861, in the tensile strength class 90OMPa. at room temperature, maximum test temperature of material 632 C. O 2. Ref ererice. ICO3353;1979:Aerospace construction;.rolled screw threads: runout and lead requirements. 1805855/1;i
7、98i:Aerospace construction - MJ threads - Part i: Basic profile. IS05855/2; 1981:Aerospace construction - MJ threads - Part 2: Dimensions far bolts and nuts. ENZ398 : Heat recii sting steel FE-PATZ-HT RM =TMPa, bars for machined bolts: Aerospace series. EN2397 :Heat resisting steel FE-PA92-HT, RM =H
8、MPa, bars for forged bolts: Aerospace series. EN2424 :Aerospace eriesgfasteners:identif icztion marking of. EN3043 :Aerospace eries,fasteners,screws and studs material FE-PATZ-HT ,class 900MPa1650“C. : technical specif ication. Ci. Required character i sti ts. 74 .J. L SonTiguration-dimens90ns-toler
9、ances. The configuration shall correspond with figurel, dimensions and tolerances shall correspond to figurei and tables1 i3 2. 3.2 Material. Heat resisting steel FE-PA92-HT to EN2398 or EN2399. 3.3 Surface treatment. Nonei, /= Previous page is blank L Break sharp Qdges 0,l to 0,4 - OJ003/ I A r Ide
10、ntity marking - Stihpe in this area at / manu facki rers opt i on Dia R S - code Max Min Mm Min Toi 030 0,4 0,2 6,O 5,88 O40 0,4 0,2 7,O 6,85 h12 Hexa on Lpfq-q W Max Min 1,4 1,15 1,8 1,45 . 6 places Dia Thread 030 MJ3x0,5 4h 6h 040 IMJ4 0,74h6h Figure1 Table 1 LqD . 1 diameter -IS0 3353 1 ThreUd OD
11、 I E IF Max I Min IMin !Min I I 3,68 I3,42 I 7,6 I 6,4 I I I Dimensions in mm GI H K Table 2 Length N code Di ameter codes Mass 1 Mass 040 004 4 0,67 1,31 1 v46 1,42 i ,7? 006 008 O10 012 1 016 6 0,76 8 0,85 10 0,94 12 1 ,O2 018 18 1,2? 2,24 020 20 1,38 2,40 - o22 22 1,47 2,55 024 24 1 ,56 2,71 026
12、26 1,65 2,8? I I 042 prENS?37 page5 Issue PI .- ,AECMA PREN2937 Ab- W 1OL23LL 0004523 B W I_ . prEN2997 page6 Issue PI 4. Designation. Each screw shall only be designated as fallows: Description bl ack Identif i cati on b1 ack Screw number of EN standard diameter code(5ef tablei) length code(see tab
13、le21 I Note: If necessary the deign code SSOOS may be introduced between the description block &nd the identity block. 5.Marking. Each screw 5haii be marked on the top surface of the head in accordance with EN2424,style D. 6. Technical specification. Screws to this standard shall conform to the requirements of EN3043,
