1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 1999-09-30 prEN 4497 Edition P 1 September i999 C3 Chairman Mr Visconti Comments should be sent within six months after the date of publication to AECMA Gulledelle 94 B-I 200 BRUXELLES PUBLISHED BY THE EUROPEAN ASSOCIATION OF AER
2、OSPACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 1 O - Fax. (+32) 2 775 81 11 ICs: 49.030.20 Descriptors: aircraft industry, aircraft equipment, screw, cheese head screw, cross recess screw, titanium alloy, screw thread, specification, characteristic, dimension, mass,
3、 dimensional tolerance, surface treatment, designation, marking ENGLISH VERSION Aerospace series Screws, pan head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, with aluminium pigmented coating Classification: I I00 MPa (at ambient temperature) / 3
4、15 OC Srie arospatiale Vis tte cylindrique, empreinte cruciforme dporte, ft normal tolrance serre, filetage court, en alliage de titane, anodises, avec revtement alumino-organique Classification : 1 100 MPa ( temprature ambiante) / 315 OC Luft- und Raumfahrt Flachkopf-Paschrauben, mit Flgelkreuzschl
5、itz, kurzes Gewinde, aus Titanlegierung, anodisiert, mit Aluminium pigmenttete Beschichtung Klasse: 1 100 MPa (bei Raumtemperatur) I315 “C This Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on gre
6、en paper for the needs of AECMA-Members. It has been technically approved by the experts of fhe concerned Technical Committee following comment by the Member countries. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability
7、is affecfed, 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 wil/ be submitted as a draft European Standard to CEN (European Com
8、mittee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199. rue Jean-Jacaues Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX STD-AECMA PREN 4477-ENGL 1777 118 LOL23LL 0036540 868 Page 3 prEN 4497: 1999 1 Scope This standard specifies the characteri
9、stics of screws, pan head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, with aluminium pigmented coating. Classification: 1 100 MPa I)/ 315 “C 2, 2 Normative references IS0 3353 IS0 5855-2 IS0 7913 IS0 7994 IS0 9152 EN 2000 EN 2424 EN 3042 EN 4016
10、 EN 4474 MIL-L-87132B TR 3775 Aerospace - Rolled threads for bolts - Lead and runout requirements Aerospace - MJ threads - Part 2: Limit dimensions for bolts and nuts Aerospace - Bolts and screws, metric - Tolerances of form and position Aerospace - Internal drive, offset cruciform recess (Torq-Set
11、8) for rotary fastening devices - Metric series Aerospace - Bolts, with MJ threads, in titanium alloys, strength class 1 100 MPa - Procurement specification Aerospace series - Quality assurance - EN aerospace products - Approval of the quality system of manufacturers Aerospace series - Marking of ae
12、rospace products Aerospace series - Quality assurance - EN aerospace products - Qualification procedure Aerospace series - Oversized bolts 3, Aerospace series -Aluminium pigmented coating - Coating methods 3, Lubricant, Cetyl Alcohol, I -Hexadecanol, Application to Fasteners 4, Aerospace series - Bo
13、lts and pins - National materials 5, I) Minimum tensile strength of the material at ambient temperature 2) Maximum temperature that the screw can withstand without continuous change in its original characteristics, after return to ambient temperature. The maximum temperature is determined by the coa
14、ting. 3) Published as AECMA Prestandard at the date of publication of this standard 4) Published by: Department of Defense (DoD), the Pentagon, Washington, D.C.20301, USA 5) Published as AECMA Technical Report at the date of publication of this standard Previous page is blaiik Page 4 prEN 4497: I999
15、 STD=AECflA PREN 4497-ENGL L m 3032333 0036543 7T4 M 3 Required characteristics 3.1 Configuration - Dimensions - Masses See figure 1 and table 1. Dimensions and tolerances are expressed in millimetres and apply after coating (tolerance on shank diameter before coating is also specified). Details of
16、form not stated are left to the manufacturers discretion. 3.2 IS0 7913 Tolerances of form and position 3.3 Materials TR 3775 (titanium alloy, strength class 1 100 MPa) 3.4 Surface treatments EN 4474 Lubrication with cetylic alcohol (chlorine free) according to MIL-L-87132 STD.AECMA PREN 4477-ENGL 17
17、79 1111 LOL23LL 00Lb542 630 Page 5 prEN 4497: I999 Values in micrometres apply prior to surface treatment. Y7 YI Break sharp edges 0,l to 0,4. 4 Key 1 2 Thread 3 Marking 4 Drive: see table 3. 5 Conforms to IS0 3353 a Shape optional One hole diameter D, (optional) Figure I STD-AECMA PREN 4497-ENGL L9
18、99 BI L0123bl 0016543 577 II Page 6 prEN 4497: 1999 Table 1 Diameter Thread a D, 1 code I nom. I TOI. before coating I 040 IMJ4x0,7-4h6h I 4 I t I 5 - 0,030 - 0,045 050 I MJ5x0,8-4h6h I 060 IMJ6x1-4h6h I61 I 070 IMJ7x1-4h6h 171 I 8 - 0,033 - 0,048 080 MJ81-4h6h I 1 O0 MJIOxl,25-4h6h I 10 I 120 lMJIx
19、1.25-4h6h I 12 1 Io,o5, 0,036 after O coating -0,3 min. nom. TOI. - 0,Ol o - 0,035 - 0,013 - 0,038 10 I 8.7 I 3.4 I 20 I 18,7 I 7,9 I 24 I 22,7 I 9,8 1 - 0,041 E I j n; 1 Toi. o - 0,3 274 a In accordance with IS0 5855-2, except the thread major diameter “d max.“ which shall be equal to D, min. - 0,0
20、25. increments: 1 for Li I30 2 for 30 i Li 5 100 4 for L, 100 If greater lengths are required, they shall be chosen using the above increments The length code corresponds to length i, Approximate values (kgll O00 pieces), calculated on the basis of 4,45 kg/dm3, for information purposes only. They ap
21、ply tc Value for head and first L4 Increase for each additional millirnetre of L,. completed by one or two zeros to the left, where necessary, to obtain a three digit code. screws without holes. e STD-AECMA PREN 4497-ENGL 1799 IB L0423LL 0036544 403 Page 7 prEN 4497: 1999 Number of this standard 4 D
22、esignation EXAMPLE: Hole code (see table 2) Diameter code (see table I) Description block 1 Identity block Holes With Code D Drive IS0 7994 IS0 7994 unribbed Code R A 5 Marking 050 to 120 See table 4 and figure 1, indented. Table 4 C+MJ Diameter code I EN 2424 Style 6 Technical specification IS0 9152, except for clauses: - Approval of manufacturers: see EN 2000; - Qualification of screws: see EN 3042. 7 Oversized bolts EN 4016
