1、A.E.C. M.A. STANDARD NORM E A. E.C. M .A. A.E.C.M.A. NORM Lb prEN2939 Issue P 1 May 1986 EDITE PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATERIEL AEROSPATIAL 88, boulevard Malesherbes, 75008 PARIS - TEL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series thread to head, in heat re
2、sisting steel FE-PA92HT (A286) unplated Classification : 900 MPa/650 OC Screws, I OOo countersunk head, Torq-Set recess, Luft- und Raumfahrt 03 Senkschrauben 1000. flgelkreuzschlitz, Vis tte fraise 1000, empreinte Torq-Set , Gewinde bis Kopf, aus hochwarmfestem Stahl FE-PA92HT (A286) blank Klasse :
3、900 MPa/650 OC Srie arospatiale filete sous tte, en acier rsistant chaud FE-PA92HT (A286) non revtu Classification : 900 MPa/650 OC This standard is initially published on green paper for the needs of AECMA-Members (Association Europenne des Constructeurs de Matriel Arospatial). It has been technica
4、lly approved by the experts of the concerned AECMA Commission following comment by the manufacturers of the Member countries. 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 published in its
5、final version on yellow paper as an AECMA Standard. Nota - Extra copies can be supplied bv B.N.A.E. - 8, rue Moreau-Vauthier - 92100 BOULOGNE-BILLANCOURT Edition approved for publication Comments should be sent within six monfhs after the date of Publication decision 15 May 1986 A.E:C.M.A. 88, Bd. M
6、alesherbes 75008 PARE - FRANCE C8 Chairman Mr WILLIAMS ?3 aecma 1986 AECMA PREN2939 Ab m LOL23LL OOOL1530 5 m prEN2939 page3 Issue PI 1.Scope and field of application. 1.1 This standard specifies the ch racteristics of screws with locountersunk heads,TORB-CET recess, fully threaded, in heat resistin
7、g steel FE-FA92-HTI4286), in the tensile strength cia55 9OMFa. at room temperature, maximum test temperature of material 650 C. w O 2. Reierences. IS03353;197?:Aerospace c0nstruction;rolled screw thr-eads: runout and lead requirements. IS05855/1;1981:Aerospace construction - MJ threads - Part 1: Bas
8、ic profile. IS05855/2;1981:Aerospace construction - MJ threads - Part 2: Dimensions for bolts and nuts. ISC7994; 19m: Aerospace - Internal drive o.Ff set cruciform recess (Torq-Cet 1 for rotary fastening devices - Metric series. R EN2398 :Heat resisting steel FE-PA9Z-HT, RM =39OMPa, bars for machine
9、d bolts: Aerospace series. EN2SS? :Heat t-esisting steel FE-FAW-HT? RM =)9OMPa, bars for forged bolts: Aerospace series. EN2424 :aerospace series;fasteners:identification marking of. EN3043 :Aerospace series,fasteners,screws and studs material FE-PAW-HT,class SQMPa/650C. : technical specif kcation.
10、3, Required char acteri sti csj. T .J. i Soniiguration-dimensons-orce- The configuration shall correspond with figurel, dimensions and tolerances shall carrespand to figurel and tables1 3: 2. .-e 3.3 h1akW-l a! . Heat resisting steel FE-PAW-HT to EN2398 or EN2399. - 3.3 Sur+ace treatment. Nane. Prev
11、ious page I I is blank - AECMA PREN2939 86 10L23Ll OOOL153L 7 Surface texture 3 d 2 prENZ939 page4 Issue 21 r- Rolled 08 d, 0,8 $- 030 040 Break sharp edges 0,i to OIL, MJ3x0,5 4h6h 2,81 2,55 MJ4074hbf.i 3,68 3/42 TTorq -set recess (HI- -c d-1 Not concave 1 I 111, -Pso 3353 Thread - f R y O Rolled I
12、 f - u -. di ameter /Al - Q 0,003/1 A - Figure I Table 1 I OCO IMJ5x0,84h6h I 4,61 (4,35 1 050 Dimensions in mm 6,O I 5,4 14,s I l,4 I0,06 I 8,O I 7,2 I 5,78 I 1/87 I0,08 I I 10,O I 9,O I 7,71 I 2,38 I0,IO I R w Max o, 4 0,4 0,5 I0,3 13,981 3,58 Recess No IS0 7994 R4 R5 1 I AECMA PREN2739 86 m LOL23
13、LL 0004532 7-mp N prEN293? .page5 Issue PI Diameter codes 030 040 050 Mass I Mass I Mass Length 008 6 I 010 0,43 U,84 I 012 8 lG = 020 0,51 0,9? 1,75 0,60 1,15 2,QU I 022 18 20 028 o315 U32 u34 036 038 040 p _ 0,96 1,77 3,u0 1 ,O5 1,93 3,25 o42 It-& 22 24 Table 2 1,14 2,08 T ay50 1,22 2,24 3,75 28 1
14、,40 2,55 4,28 36 38 40 42 1,31 2,25 2,50 0,87 1,62 1,76 3,18 5,25 5,50 i ,84 .2* , 3s i ,?3 3,44 5,?5 2,152 3,64 &,00 T 32 1,58 2,86 4,75 34 1,67 3,02 5,00 Table 2 (continued) Mass quoted in Kq/1000 Length N Di ameter codes 1 code I Mass I I 4. Designation. Each screw shall only be designated as fol
15、lows: Descri p t i on b 1 oc k I dent i fi cati on bl oc: k Screw diameter code(see table11 number of EN standard length code(see table21 Note: If necessary the design code C90S may be introduced between the description block and the identity block. 5.Marking. Each screw shall be marked on the top surface of the head-in accardance with EN2424, diameters 3 & 4 style J, diameter 5 style C. b.Technirs.1 speci+icatisn. Screws to this standard shall canfarm to the requirements of. EN3043.
