BS EN 3305-1997 Screws 100 countersunk reduced head offset cruciform recess close tolerance normal shank short thread in alloy steel cadmium plated - Classification 1100 MPa (at a.pdf

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1、BRITISH STANDARD AEROSPACE SERIES BS EN 3305:1997 Screws, 100 countersunk reduced head, offset cruciform recess, close tolerance normal shank, short thread, in alloy steel, cadmium plated Classification: 1100MPa (at ambient temperature)/235 C The European Standard EN 3305:1996 has the status of a Br

2、itish Standard ICS 49.030.20BSEN 3305:1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1997 BSI 12-1998 The following BSI references relate to the work o

3、n this standard: Committee reference ACE/12 Draft for comment 92/74426 DC ISBN 0 580 27024 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee ACE/12, Aerospace fasteners and fastening systems, upon which the following bodi

4、es were represented: Association of Electronics, Telecommunications and Business Equipment Industries British Industrial Fasteners Federation Ministry of Defence Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No. Date CommentsBSEN3305:1997 BSI 12-1998 i Contents

5、 Page Committees responsible Inside front cover National foreword ii Foreword 2 1 Scope 3 2 Normative references 3 3 Required characteristics 3 4 Designation 6 5 Marking 6 6 Technical specification 6 7 Oversized bolts 6 Figure 1 4 Table 1 5 Table 2 6 Table 3 6 Table 4 6 Table 5 6 List of references

6、Inside back coverBSEN 3305:1997 ii BSI 12-1998 National foreword This British Standard has been prepared by Technical Committee ACE/12 and is the English language version of EN 3305:1996 Aerospace series Screws, 100 countersunk reduced head, offset cruciform recess, close tolerance normal shank, sho

7、rt thread, in alloy steel, cadmium plated Classification: 1100 MPa (at ambient temperature)/235 C, published by the European Committee for Standardization (CEN). EN 3305:1996 was produced as a result of international discussions in which the United Kingdom took an active part. A British Standard doe

8、s not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred to Corresponding British

9、Standard EN 2000:1991 BS EN 2000:1992 Quality assurance EN aerospace products Approval of the quality system of manufacturers EN 2424:1995 BS EN 2424:1995 Marking of aerospace products EN 3042:1991 BS EN 3042:1992 Quality assurance EN aerospace products Qualification procedure ISO 3353:1992 BS 2A 23

10、1:1993 Rolled threads for bolts. Lead and runout requirements ISO 5855-2:1988 BS 6293 Aerospace. MJ threads Part 2:1994 Limit dimensions for bolts and nuts ISO 7689:1988 BS A 300:1989 Specification for procurement of alloy steel bolts with strength classification 1100 MPa and MJthreads ISO 7913:1994

11、 BS 2A 296:1995 Bolts and screws, metric Tolerances of form and position ISO 7994:1985 BS A 297:1987 Specification for internal drive, offset cruciform recess (Torq-Set ) for rotary fastening devices. Metric series Summary of pages This document comprises a front cover, an inside front cover, pages

12、i and ii, the EN title page, pages 2 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN

13、 3305 September 1996 ICS 49.040.20 Descriptors: Aircraft industry, screw, countersunk head screw, cross recessed screw, alloy steel, specification, dimension, dimensional tolerance, surface treatment, designation, marking English version Aerospace series Screws, 100 countersunk reduced head, offset

14、cruciform recess, close tolerance normal shank, short thread, in alloy steel, cadmium plated Classification: 1 100 MPa (at ambient temperature)/235 C Srie arospatiale Vis tte fraise 100 rduite, empreinte cruciforme dporte, tige normale tolrance serre, filetage court, en acier alli, cadmies Classific

15、ation: 1100MPa ( temprature ambiante)/235 C Luft-und Raumfahrt 100 Senk-Paschrauben mit kleinem Kopf, mit Flgelkreuzschlitz, kurzes Gewinde, aus legiertem Stahl, verkadmet Klasse: 1 100 MPa (bei Raumtemperatur)/235 C This European Standard was approved by CEN on 1996-06-29. CEN members are bound to

16、comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central

17、 Secretariat or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the

18、official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen

19、 de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 3305:1996 E CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue d

20、e Stassart 36, B-1050 BrusselsEN3305:1996 BSI 12-1998 2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of

21、 the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 1997, and conflicting

22、 national standards shall be withdrawn at the latest by March 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland,

23、Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.EN3305:1996 BSI 12-1998 3 1 Scope This standard specifies the characteristics of screws, 100 countersunk reduced head, offset cruciform recess, close tolerance normal shank, short thread, in

24、alloy steel, cadmium plated. Classification: 1 100 MPa 1) /235 C 2) 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed

25、hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. ISO 3353, Aerospace Rolled thre

26、ads for bolts Lead and runout requirements. ISO 5855-2, Aerospace MJ threads Part 2: Limit dimensions for bolts and nuts. ISO 7689, Aerospace Alloy steel bolts with strength classification 1 100 MPa and MJ threads Procurement specification. ISO 7913, Aerospace Bolts and screws, metric Tolerances of

27、form and position. ISO 7994, Aerospace Internal drive, offset cruciform recess (Torq-Set ) for rotary fastening devices Metric series. EN 2000, Aerospace series Quality assurance EN aerospace products Approval of the quality system of manufacturers. EN 2133, Aerospace series Cadmium plating of steel

28、s, with maximum specified tensile strength equal to or less than 1 450 MPa, copper, copper alloys and nickel alloys 3) . EN 2424, Aerospace series Marking of aerospace products. EN 3042, Aerospace series Quality assurance EN aerospace products Qualification procedure. EN 4016, Aerospace series Overs

29、ized bolts 4) . TR 3775, Aerospace series Bolts and pins National materials 5) . 3 Required characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table 1. Dimensions and tolerances are expressed in millimetres and apply after surface treatment. 3.2 Tolerances of form and position ISO

30、7913 3.3 Materials TR 3775 (alloy steel, strength class 1 100 MPa) 3.4 Surface treatment EN 2133, 6 m to 10 m, on all surfaces which can be contacted by a 20 mm diameter ball. On all other surfaces, a continuous deposit shall be present, but no value is specified. Black colour option: code B 1) Mini

31、mum 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 surface treatment. 3) Published as AECMA Standa

32、rd at the date of publication of this standard 4) Published as AECMA Prestandard at the date of publication of this standard 5) Published as AECMA Technical Report at the date of publication of this standardEN 3305:1996 4 BSI 12-1998 Figure 1EN 3035:1996 BSI 12-1998 5 Table 1 Diameter code Thread a

33、D 1 D 2 D 3 D 4 D 5 D 6 E F G H L 1 0,2 bc L 2 L 3 R Mass d nom. Tol. max. min. nom. Tol. H13 min. max. Code nom. nom. Tol. e f 040 MJ40,7-4h6h 4 0,010 0,035 6,25 5,45 4,82 3 1,1 0,08 0,6 0,4 0,95 003 to 040 3 to 40 7,5 5 0,4 0,42 0,10 050 MJ50,8-4h6h 5 7,8 6,8 5,79 3,4 0,5 1,5 0,1 0,85 0,5 1,18 004

34、 to 050 4 to 50 9 6 0,5 0,87 0,15 060 MJ61-4h6h 6 9,4 8,2 7,71 4,2 0,71 0,6 1,43 005 to 060 5 to 60 10 7 0,7 1,55 0,22 070 MJ71-4h6h 7 0,013 0,038 10,95 9,75 9 5,2 1,9 0,82 1,67 006 to 070 6 to 70 11 2,53 0,30 080 MJ81-4h6h 8 12,5 11,3 10,28 6,2 0,93 1,9 006 to 080 6 to 80 11,5 7,5 3,46 0,39 100 MJ1

35、01,25-4h6h 10 15,6 14,4 12,86 7,9 2,4 1,15 2,36 008 to 100 8 to 100 14,5 9 0,8 7,09 0,62 120 MJ121,25-4h6h 12 0,016 0,041 18,75 17,55 15,43 9,8 1,4 2,85 010 to 120 10 to 120 16 10 0,9 12,71 0,89 140 MJ141,5-4h6h 14 21,85 20,65 18 11,5 3 1,62 3,31 010 to 140 10 to 140 19 12 1,1 18,20 1,21 160 MJ161,5

36、-4h6h 16 25 23,8 20,57 13,5 1,87 3,8 010 to 160 10 to 160 20,5 12,5 25,06 1,57 180 MJ181,5-4h6h 18 28,1 26,9 23,14 15,5 3,8 2,09 4,27 011 to 180 11 to 180 22,5 14,5 1,3 35,24 2 200 MJ201,5-4h6h 20 0,020 0,045 31,2 30 25,71 17,5 2,32 4,74 012 to 200 12 to 200 24,5 15 47,85 2,47 a In accordance with I

37、SO 5855-2, except the thread major diameter “d max.” which shall be equal to D 1min. 0,025. b Increments: 1 for L 1 # 30 2 for 30 100 c If greater lengths are required, they shall be chosen using the above increments. The length code corresponds to the length L 1 , completed by one or two zeros to t

38、he left, where necessary, to obtain a three digit code. d Approximate values (kg/1 000 pieces), calculated on the basis of 7,85 kg/dm 3 , given for information purposes only. They apply to screws without hole. e Value for first L 4 f Increase for each additional millimetre of L 4 . 0 0 08 , 0 0 5 ,

39、0 0 2 , 0 0 3 ,EN3305:1996 6 BSI 12-1998 4 Designation NOTEIf necessary, the code 19005 shall be placed between the description block and the identity block. Table 2 Table 3 5 Marking See Table 4 and Figure 1, indented. Table 4 6 Technical specification ISO 7689, with the following modifications: 6.

40、1 Approval of manufacturers EN 2000 6.2 Qualification of screws EN 3042 6.3 Other modified requirement Tensile strength test loads: see Table 5. Table 5 6.4 Requirements deleted Cold rolling; Double shear strength; Tension fatigue strength; Head to shank fillet work effect. 7 Oversized bolts EN 4O16

41、 Hole Code with D without - (hyphen) Drive Code ISO 7994 R ISO 7994 unribbed A Diameter code EN 2424 Style 040 N 050 to 200 C + MJ Loads in kilonewtons Diameter code Minimum tensile strength test loads 040 4,71 050 7,57 060 10,77 070 13,61 080 18,34 100 28,66 120 42,80 140 58 160 61,76 180 79,68 200

42、 99,52BSEN3305:1997 BSI 12-1998 List of references See national foreword.BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

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