ASD-STAN PREN 3712-1991 Aerospace Series Nuts Anchor Self-Locking One Lug Fixed Reduced Series with Counterbore in Steel Cadmium Plated MoS2 Lubricated Classification 1100 MPa (at .pdf

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1、;CEN PRENr3912 93 3404589 0030887 3 Edition approved for publication 1991-03-01 7 a a a a - I- Comments should be sent within six months after the date of publication decision A.E.C.M.A. 88, Bd. Malesherbes 75008 PARIS - FRANCE A. E.C. M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM prEN 3712 Issue

2、 P I March 1991 DITE 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 Nuts, anchor, self-locking, one lug, fixed, reduced series, with counterbore, in steel, cadmium plated, M

3、os2 lubricated Classification : 1 1 O0 MPa (at ambient temperature) /235 OC Srie arospatiale Luft- und Raumfahrt crous river, freinage interne, fixes, simple patte, srie rduite, avec chambrage, en acier, cadmis, lubrifis MOS, Classification : 11 O0 MPa ( temprature ambiante) /235 OC Annietmuttern, s

4、elbstsichernd, einseitiger verkrzter Flansch, mit zylindrischer Aussenkung, aus Stahl, verkadmet, Mos2 geschmiert Klasse : 11 O0 MPa (bei Raumtemperatur) /235 OC This .Aerospace Series. pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matri

5、eArospatial): It is published on green paper for the needs ofAECMA-Members. It has been technically approved by the experts of the concerned Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technicalcontent shall not be changed to an exten

6、t that interchangeability is affected, 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 will be submitted as a draft European Sta

7、ndard to CEN (European Committee for Standardization) for final vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 92138 ISSY LES MOULINEAUX CEDEX C3 Chairman Mr.ARENA r j - - aecrna 1991 prEN 3712 Page 3 1 Scope and field of application Tliis s

8、tandard specifies characteristics for one lug, reduced series, caunterbared, fixed anchor nuts, with a self-locking feature achieved by forming the upper portion out- -round, n steel, cadmium plated, Mos2 lubricated, classification 1100 MPa Pf/235 “C 23 . 2 References IS0 3191, IS0 5855-2, IS0 58S8,

9、 EN 2133, EN 2424, EN 2491 EN 2542, EN 2543, EN 3042, EN 3704, Aerospace - Self-locking, fixed, single-lug anchor nuts, reduced series, with counterbore, strength classification 1100 MPa and maximum operating temperature 235 OC Aerospace - MJ Threads - Part 2 : Limit dimensions for bolts and nuts Ae

10、rospace - Self-locking nuts with maximum operating temperature less than or equal to 425 OC - Procurement specification 3) Aerospace - Fasteners - Tolerances of form and position for nuts Aerospace series - Quality assurance - EN aerospace products - Approval of the quality system of manufacturers 4

11、) Cadmium plating of steels with maximum specified tensile strength equal to or less than 1450 MPa and copper and copper alloys - Aerospace series 4) Aerospace series - Identification marking of standard fasteners 4) Aerospace series - Molybdenum disulphide dry film lubrcants applied to fasteners 3)

12、 Aerospace series - Steel FE-PL43S - Annealed - Bar and wire D Aerospace series - Steel FE-PL43S - Anneaied - Sheet and strip 0,3 -I a 2 mm for prevailing torque nuts 5) 40 mm for prevailing torque nuts 5) e- Aerospace series - Quality assurance - EN aerospace products - Qualification procedure 4) A

13、erospace series - Substitute materials for ail metal self-locking nuts and thin wall inserts 3) 1) Corresponds to strength class of the associated bolt, the 100 per cent load of which it: is able to withstand, when tested at ambient temperature, without breakiiig or cracking. 2) - qualification of products : EN 3042. - I

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