1、 AECMA PRENx353b 96 LOL23LL OOL075L TbL AECMA STANDARD prEN 3536 NORME AECMA Edition P 2 AECMA NORM February 1996 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - B-1200 BRUXELLES - Tel. (32) 2 775 81 10 - Fax. (32) 2 775 81 11 ICs : 49.040.20 Supersedes issue P
2、1 March 1991 Descriptors : Edition approved for publication ENGLISH VERSION C3 Chairman Comments should be sent within six months after the date of publication to Aerospace series Nuts, hexagon, self-locking, in heat resisting steel, Mos2 lubricated Classification : 1 100 MPa (at ambient temperature
3、) / 31 5 OC Srie arospatiale Luft- und Raumfahrt crous hexagonaux, freinage interne, en acier rsistant chaud, lubrifis Mos2 ( temprature ambiante) / 315 OC Sechskantmuttern, selbstsichernd, aus hochwarmfestem Stahl, MoS2-geschmiert (bei Raumtemperatur) / 315 OC Classification : 1 100 MPa Klasse : 1
4、100 MPa This “Aerospace Series” Prestandard has been drawn upc under the responsibility of AECMA (The European Association of Aerospace Industries). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee fol
5、lowing comment by the Member countries. Subsequent to the publication of this Prestandard, 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 signature of the AECMA
6、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 formal vote. 1996-02-29 AECMA Gulledelle 94 E-1 200 BRUXELLES Mr Arena I I I aecrna 1996 - AECMA
7、PREN*353b 96 1012311 0010752 TB Page 3 prEN 3536 : 1996 1 Scope This standard specifies characteristics of self-locking hexagonal nuts, with flange, in heat resisting steel, Mos2 lubricated. Classification : 1 1 O0 MPa 1) / 31 5 OC 2). 2 Normatives references IS0 5855-2 IS0 5858 IS0 7995 IS0 8788 EN
8、 2000 EN 2424 EN 2491 EN 3042 TR 3791 Aerospace - MJ threads - Part 2 : Limit dimensions for bolts and nuts Aerospace - Self-locking nuts with maximum operating temperature less than or equal to 425 OC - Procurement specification Aerospace - Nuts, hexagonal, self-locking, with MJ threads, coated or
9、uncoated, classification 1 100 MPa / 235 OC, 1 100 MPa / 315 OC or 1 100 MPa I425 OC - Dimensions Aerospace - Fasteners - Tolerances of form and position for nuts Aerospace series - Quality assurance - EN aerospace products - Approval of the quality system of manufacturers Aerospace series - Marking
10、 of aerospace products Aerospace series - Molybdenum disulphide dry lubricants - Coating methods 3) Aerospace series - Quality assurance - EN aerospace products - Qualification procedure Aerospace series - Materials for all metal self-locking nuts and thin wall inserts of temperature classes 5 425 O
11、C 4) 1) Corresponds to the minimum tensile stress which the nut is able to withstand at ambient temperature without breaking or cracking when tested with a bolt of a higher strength class. 2) Maximum temperature that the nut is able to withstand, without permanent alteration to its original characte
12、ristics, after ambient temperature has been restored. The maximum temperature is conditioned by the Mos2 lubricant. 3) Published as AECMA Standard at the date of publication of this standard 4) Published as AECMA Technical Report at the date of publication of this standard Previous page is blank AEC
13、MA PREN*353b 96 m 3032333 0030753 834 m Page 4 prEN 3536 : 1996 3 Required characteristics 3.1 See figure 1 and table 1. Configuration - Dimensions - Masses Dimensions and tolerances are : in conformity with IS0 7995, expressed in millimetres and apply before Mos2 lubricating. Details of form not st
14、ated are at the manufacturers option. 3.2 IS0 8788 Tolerances of form and position 3.3 Materials TR 3791 3.4 Surface treatment EN 2491, thickness not specified AECMA PRENu3536 96 10L23LL 0030754 770 Page 5 prEN 3536 : 1996 Remove sharp edges 0,l to 0,4 x-x L 1) These values in micrometres apply befo
15、re surface threatment. They do not apply to threads and sheared edges the surface texture of which will be as achieved by usual manufacturing methods. 2) Tooling marks are permitted in this area. 3) All forms of entry (chamfer or radius) are permissible within these limiting dimensions. Figure 1 Tab
16、le 1 1) In accordance with IS0 5855-2. In the self-locking zone the tolerances apply before forming out-of-round. 2) These dimensions apply before forming out-of-round, but finished nuts shall fit a standard socket wrench. 3) Wrench pad engagement 4) Approximate values (kg/l O00 pieces), given for i
17、nformation purposes only AECMA PRENx353b 96 W LOL23LL 0030755 607 = Description block NUT Page 6 prEN 3536 : 1996 Identity block EN3536-050 4 Designation EXAMPLE : Diameter code (see table 1) NOTE : If necessary, the code 19005 shall be placed between the description block and the identity block. 5 Marking EN 2424, style N. See figure 1. 6 Technical specification IS0 5858, except for : - Approval of manufacturers : EN 2000 ; - Qualification of products : EN 3042.
