1、A. E. C. M ,A. STAN DAR D NOR ME A. E.C. M .A. A.E.C.M.A. NORM Edition approved for publication 28th February 1990 prEN 3636 Issue P 7 February 1990 Comments should be sent within six months C8 Chairman A.E.C.M.A. Mr. WILLIAMS after the date of publication decision 88, Bd. Malesherbes 75008 PARIS -
2、FRANCE DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88, boulevard Malesherbes, 75008 PARIS - TL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Screws, reduced pan head, offset cruciform recess, relieved shank, long thread, in heat resisting steel FE-PA92HT
3、(A286), silver plated Classification : 900 MPa/650 OC Srie arospatiale Vis tte cylindrique, rduite, empreinte cruciforme dporte, tige rduite, filetage long, en acier rsistant chaud FE-PA92HT A286), argentes Classification : 900 MPa/650 OC Luft- und Raumfahrt Flachkopfschrauben mit geripptem Flgelkre
4、uzschlitz, Dnnschaft, langes Gewinde, aus hochwarmfestem Stahl FE-PA92HT (A286), versilbert Klasse : 900 MPa/650 OC This .Aerospace Series pre-standard has been drawn up under the responsbility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper f
5、or the needs of AECMA-Members. It has been teehnicaliy 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 shallnot be changed to an extent that interchangeability is affected, physic
6、ally 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 Standard
7、ization) for final vote. 1 Scope This standard specifies the requirements for head screws with relieved shank and long thread in heat resisting steel FE-PA92HT, silver plated, tensile strengh class 900 MPa at room temperature. The maximum test temperature of the material is 650C. offset cruciform re
8、cess pan 2 References IS0 3353 : Aerospace construction - Rolled threads - Run-out and lead threads IS0 5855/1 IS0 5855/2 IS0 7994 EN 2424 EN 2786 EN 3043 EN 2398 EN 2399 : Aerospace construction - MJ threads - Part 1 : General requirements : Aerospace construction - MJ threads - Part 2 : Limit dime
9、nsions for bolts and nuts : Aerospace - Internal drive, offset cruciform recess for rotary fastening devices - Metric series : Aerospace series - Identification marking of standard fasteners i) : Aerospace series - Metallic silver plating of metals except titanium, aluminium and their alloys 2) : Ae
10、rospace series - Bolts, screws and studs in heat resisting steel FE-PA92HT - Classification : 9QO Ml?a/650“C - Technical specification3) : Heat resisting steel FE-PA92HT - RM 900 MPa - Bars for machined bolts D i 25 mm - Aerospace-series i) : Heat resisting steel FE-PA92HT - RM 900 MPa - Bars for fo
11、rged bolts D - 3 Required characteristics 3.1 Configuration - Dimensions - Tolerances Configuration : See figure. Dimensions and tolerances : See figure and tables 1 and 2, dimensions in millmetres. 3.2 Material Heat resisting steel FE-PA92HT : See EN 2398 or EN 2399. 3.3 Surface coating Silver coat
12、 all over : See EN 2786 categorie A, coating thickness 3 to 6 pm on the thread flanks, mesured at the pitch diameter. 1) Published as AECMA standard at the date of publication of the present s tandard. 2) In preparation at the date of publication of the present standard. 3) Published as AECMA pre-st
13、andard at the date of publication of the present standard. AECMA PREN363b 90 201232L 000bLLL = prEN 3636 Page 4 Break sharp edges 0,l lo 0,4 4 7 I In conformity 3- with IS0 3353 Y a- - 0 on flank - Thread - -1 0 ( Nx0,003 ) ( Figure - Configuration Markin P Manufacturer Table 1 - Dimensions I 0,s 0,
14、3 max 7 min I z 1,2 1 0,3 !0,11 Recess number to IS0 7994 R3 R3,5 R4 AECMA PREN3b3b 90 30123l13 0006342 b ! prEN 3636 Page 5 Table 2 - Dimensional codes, lengths Diameter code Length 2) code 004 006 008 O10 012 014 O 16 O18 020 022 024 026 028 030 032 034 036 038 040 042 044 046 048 050 05 2 054 056
15、 058 060 062 064 066 068 070 N h,3 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 030 Max 1,40 1,40 1,40 1,40 1,40 1,40 4 6 8 10 12 14 16 18 20 22 24 26 28 30 W Min. 1,15 1,15 1,15 1,15 1,15 1,15 2,50 4,50 6,50 8,50 10 , 50 12,50 14,50 16,50 18,50
16、20,50 22,50 24,50 26,50 28,50 040 Max. W Min. 1 ,ao 1,80 1,8Q 1,80 1,80 1,80 4 6 8 10 12 14 . 16 18 20 22 24 26 28 30 32 34 36 38 40 42 1,45 1,45 1,45 1,45 1,45 1,45 2,50 4,50 6,50 8,50 10,50 12,50 14,50 16 , 50 18,50 20,50 22,50 24,50 26 , 50 28,50 30,50 32 50 34,50 36,50 38,fO 40,50 050 Max. W Min
17、. 2,lO 2,lO 2,lO 2,lO 2,lO 2,lO 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 1,70 1,70 1,70 1,70 2,50 4,50 6,50 8,50 10,50 12,50 14,50 16 , 50 18,50 . 20,50 22,50 24,50 26,50 28,50 30,50 32,50 34,50 36 I 50 38,50 40,50 42,50 44,50 46,50 48,50 50 , 50 52,50 1570 1370 1)
18、The preferred length range lies within the bold lines. If greater lengths are necessary they shall be chosen in steps of 2 mm fm lengths L less than 100 mm and in multiples of 4 above 100 mm. The length code corresponds to the length L in millimeters completed by zeroes to the left, where necessary
19、to obtain a 3 digit code. AECMA PREN363b 90 m LOL231L 00061113 m prEN 3636 Page 6 4 Designation Each screw shall only be designated as in the following example : Description block Identity block Diameter Number Length of code code EN (see standard (see table table t- 2) 1) SCREW REDUCED PAN EN3636-0
20、30-010 Note : If necessary the originator code I9005 may be introduced between the description block and identity block, 5 E Marking ch screw shall be marked in the position shown on the figure in with the styles shown in table 4 as defined by EN 2424. Table 4 - Marking styles Diameter code Marking style 030 - 040 F 050 L ccord nc e 6 Technical specification See EN 3043.
