1、A. E. C a M .A. STAN DAR D NORM E A. E.C. M .A. A.E.C.M.A. NORM Edition approved for publication Comments should be sent within six months after the date of publication decision 88, Bd. Malesherbes 5th October 1989 A.E.C.M.A. 75008 PARIS - FRANCE prEN 3033 Issue P 1 October 1989 C8 Chairman Mr. WILL
2、IAMS DIT PAR LASSOCIATION EUROPEENNE DES CONSTRUCTEURS DE MATRIEL AEROSPATIAL 88, boulevard Malesherbes, 75008 PARIS - TL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Nuts, self-locking, hexagonal with captive washer, in heat resisting steel FE-PA92HT (A286), uncoated Classificati
3、on : 1 I O0 MPa/425 OC Arie arospatiale Luft- und Raumfahrt Ecrous hexagonaux avec rondelle captive auto-freinant, en acier rsistant chaud FE-PA92HT (A286), non revtu Classification : 1 1 O0 MPa/425 OC Sechskantmuttern, selbstsichernd mit Brdelscheibe, aus hochwarmfestem Stahl FE-PA92HT (A286), blan
4、k Klasse : 1 1 O0 MPa/425 QC This derospace Series pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs ofAECMA-Members. It has been technically approvedby the experts of the con
5、cerned Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and s
6、ignature 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 Standardization) for final vote. AECMA PREN3033 89 Wp101Z31h 0004309_0- = prEN 3033 Page 3 1 Sco
7、pe and field of application This standard specifies the dimensions of self-locking, uncoated hexagonal nuts with captive washer and MJ-thread in heat resisting steel FE-PA92 HT (A286) for aerospace applications. Maximum test temperature of the parts is 425 OC. 2 References IS05855/1 IS05855/2 EN2399
8、 EN2424 EN2516 EN3152 EN3638 EN3639 Aerospace - MJ threads - Part 1: General requirements Aerospace - MJ threads - Part 2: Limit dimensions for bolts and nuts Heat resisting steel FE-PA92 HT - Rm2900 MPa - Bars for forged bolts DS 25 mm - Aerospace series i) Aerospace series - Identification marking
9、 of standard fasteners i) Aerospace series - Passivation of corrosion resistant steels 2) Aerospace series - Nuts, self-locking - In heat resisting steel FE-PA92 HT (A286) - Classification: 1100 MPat425 OC - Technical specification 3) Aerospace series - Heat resisting alloy FE-PA92 HT - Solution tre
10、ated - Sheet or strip ad 3 mm 2) Aerospace series - Heat resisting alloy FE-PA92HT - Rm. 3 900 MPa - Cold worked and softened - Bar and wire for continuous cold forging or extrusion for fasteners 35D530 mm 2) 3 Required characteristics 3.1 Configuration - Dimensions - Tolerances Configuration shall
11、be in accordance with the figure; dimensions, tolerances and masses shall conform with the figure and the table. Details of form, not stated are at the manufacturers option. 3.2 Material Nut: Heat resisting steel FE-PA92 HT according to EN2399, EN3638 or EN3639. Washer: Heat resisting steel FE-PA92
12、HT according to EN3638 or steel FE-PA15. 3.3 Surface treatment Nut: None Washer: Passivated to EN2516 1) Published as AECMA standard. 2) In preparation. 3) Published as AECMA pre-standard. AECMA PREN3033 87 1012311 0004710 7 W- prEN 3033 Page 4 Remove sharp edges 0.1 to 0.4 mn Lm t 0,4 A harking in
13、those permlsslble Bearing surface may be flat to concave, but Washer shall be free shall not be convex ta rotate on the nut Form out of round in this area to achieve the self -locking torque requ I remen ts tool marks acceptable lys or Threads surface will be achieved by normal methods of manufactur
14、e Figure - Configuration Table 1 - Dimensions and masses Dimensions in millimetres Thread 1) E F2) G H K L M N3) 11 h12 060 M J61,0-4H5H I 070 I MJ7x1,0-4H5H I8,7 18 I I I I l I I I I I I O80 MJ81,0-4H5H 10,9 10 15,4 7, 12 9 I 44 I 392 I I I I I I I l I I 100 MJ10x1925-4H5H 1392 12 h13 18,6 9,6 14,7
15、 11 0,4 3,8 120 MJl21925-4H5H 1595 14 21,7 11,4 18,5 13 0,4 4,5 0,1: 0,l - kg/1000 approx. 0,4 10,7 1) Thread in conformity with IS05855 part 1 and part 2. In the self-locking zone, the tolerances apply before forming out-of-round. 2) Across flats dimensions apply before forming out-of-round, but fi
16、nished nuts shall fit a standard socket wrench. 3) Wrench pad engagement. 4) These values apply before forming out-of-round. prEN 3033 Page 5 4 Designation Each hexagonal nut shall only be designated as in the following example: Description block I Identity block NUT Number of EN Standard Thread cod
17、e (see table 1) Note - If necessary, the design code I9005 may be introduced between the description block and the identity block. 5 Marking Each hexagonal nut shall be marked in accordance to EN2424, class F. 6 Technical specification The hexagonal nuts shall conform to the requirements of EN3152.
