1、BSI Standards PublicationBS EN 4138:2016Aerospace series Screws,pan head, offset cruciformrecess, coarse tolerance normalshank, medium length thread,in alloy steel, cadmium plated Classification: 1 100 MPa (atambient temperature) / 235 CBS EN 4138:2016 BRITISH STANDARDNational forewordThis British S
2、tandard is the UK implementation of EN 4138:2016. Itsupersedes BS EN 4138:2009 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/12, Aerospace fasteners and fastening systems.A list of organizations represented on this committee can beobtained on requ
3、est to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 90778 4ICS 49.030.20Compliance with a British St
4、andard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2016.Amendments issued since publicationDate Text affectedBS EN 4138:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4138 Mar
5、ch 2016 ICS 49.030.20 Supersedes EN 4138:2009English Version Aerospace series - Screws, pan head, offset cruciform recess, coarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated - Classification: 1 100 MPa (at ambient temperature) / 235 C Srie arospatiale - Vis tte cylin
6、drique, empreinte cruciforme dporte, tige normale tolrance large, filetage moyen, en acier alli, cadmies - Classification: 1 100 MPa ( temprature ambiante) / 235 C Luft- und Raumfahrt - Flachkopfschrauben, mit Flgelkreuzschlitz, mittlere Gewindelnge, aus legiertem Stahl, verkadmet - Klasse: 1 100 MP
7、a (bei Raumtemperatur) / 235 C This European Standard was approved by CEN on 27 September 2015. CEN members are bound to 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-d
8、ate lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translatio
9、n under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Fo
10、rmer Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMI
11、T EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4138:2016 EBS EN 4138:2016EN 4138:2016 (E) 2 Contents P
12、age European Foreword 3 1 Scope 4 2 Normative references 4 3 Required characteristics 5 4 Designation 8 5 Marking . 8 6 Technical specification 9 Annex A (informative) Standard evolution form . 10 BS EN 4138:2016EN 4138:2016 (E) 3 European Foreword This document (EN 4138:2016) has been prepared by t
13、he Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of AS
14、D, 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 September 2016, and conflicting national standards shall be withdrawn at the latest by September 2016. Attentio
15、n is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 4138:2009. According to the CEN-CENELEC Internal Regulations, the
16、national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
17、 Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 4138:2016EN 4138:2016 (E) 4 1 Scope This European Standard specifies the characteristics of screws, pan head, offset cruciform recess, c
18、oarse tolerance normal shank, medium length thread, in alloy steel, cadmium plated. Classification: 1 100 MPa1) / 235 C2)2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, o
19、nly the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2133, Aerospace series Cadmium plating of steels with specified tensile strength 1 450 MPa, copper, copper alloys and nickel alloys EN 2137, Steel FE-PL75 1100
20、MPa Rm 1250 MPa Bars De 100 mm Aerospace series EN 2424, Aerospace series Marking of aerospace products EN 2442, Steel FE-PL711 1100 MPa Rm 1300 MPa Bars and wires De 25 mm3)EN 3514, Steel FE-PL711 Hardened and tempered 1100 MPa Rm 1300 MPa Bar and wire for bolts De 25 mm EN 9100, Quality Management
21、 Systems Requirements for Aviation, Space and Defense Organizations EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts ISO 3353-1, Aerospace Lead and runout threads Part 1: Rolled external threads ISO 5855-2, Aerospace MJ threads Part 2: Limit d
22、imensions for bolts and nuts ISO 7689, Aerospace Bolts, with MJ threads, made of alloy steel, strength class 1 100 MPa Procurement specification ISO 7913, Aerospace Bolts and screws, metric Tolerances of form and position ISO 14275, Aerospace Drives, internal, offset cruciform, ribbed Metric series
23、ISO 14276, Aerospace Drives, internal, offset cruciform Metric series TR 3775, Aerospace series Bolts and pins Materials 1)Minimum tensile strength of the material at ambient temperature 2)Maximum temperature that the screw can withstand without continuous change in its original characteristics, aft
24、er return to ambient temperature. The maximum temperature is determined by the surface treatment 3)For new design, see EN 3514 BS EN 4138:2016EN 4138:2016 (E) 5 3 Required characteristics 3.1 Configuration Dimensions Masses See Figure 1 and Table 1. Dimensions and tolerances are expressed in millime
25、tres and apply after surface treatment. 3.2 Tolerances of form and position ISO 7913. 3.3 Materials EN 2137 and EN 2442 or TR 3775: alloy steel, classification 1 100 MPa. BS EN 4138:2016EN 4138:2016 (E) 6 3.4 Surface treatment EN 2133, thickness 8 m to 14 m, on all surfaces which can be contacted by
26、 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. Key 1 Thread 2 Marking 3 Conforms to ISO 3353-1 4 Drive 5 Shape optional 6 L4= L1+ (L2) Figure 1 BS EN 4138:2016EN 4138:2016 (E) 7 Table 1 Diameter code Threa
27、dsaD1D2D3D4D5E h12 0 0,3 min. nom. Tol. H13 nom. Tol. 030 MJ30,5 4h6h 3 6 4,7 2,3 0 0,5 1,8 0 0,2 040 MJ40,7 4h6h 4 8 6,7 3,0 1,1 2,4 050 MJ50,8 4h6h 5 10 8,7 3,4 0,5 1,5 3,0 060 MJ61 4h6h 6 12 10,7 4,2 3,6 0 0,3 070 MJ71 4h6h 7 14 12,7 5,2 1,9 4,2 080 MJ81 4h6h 8 16 14,7 6,2 4,8 100 MJ101,25 4h6h 1
28、0 20 18,7 7,9 2,4 6,0 120 MJ121,25 4h6h 12 24 22,7 9,8 7,2 Diameter code L1 0,2b, cL2L3R S Massd Length code nom. nom. Tol. max. min. e f 030 002 to 030 2 to 30 7,5 0,4 0 0,2 1,2 0,3 0,792 0,055 040 002 to 040 2 to 40 10,0 6,0 1,6 0,4 1,922 0,099 050 003 to 050 3 to 50 12,0 7,5 0,5 2,0 0,5 3,835 0,1
29、53 060 003 to 060 3 to 60 14,0 8,5 0,7 2,4 0,6 6,620 0,222 070 004 to 070 4 to 70 15,0 9,5 2,8 0,7 10,959 0,302 080 004 to 080 4 to 80 16,5 10,5 3,2 0,8 15,214 0,395 100 005 to 100 5 to 100 20,5 13,0 0,8 0 0,3 4,0 1,0 30,092 0,616 120 006 to 120 6 to 120 22,5 14,5 0,9 4,8 1,2 52,957 0,887 aIn accord
30、ance with ISO 5855-2. bIncrements: 1 for L1 100. cIf greater lengths are required, they shall be chosen using the above increments. The length code corresponds to the length L1, completed by one or two zeros to the left, where necessary, to obtain a three digit code. dApproximate values (kg/1 000 pi
31、eces), calculated on the basis of 7,85 kg/dm3, given for information purposes only. They apply to screws without holes. eValue for head and first L4. fIncrease for each additional millimetre of L4. BS EN 4138:2016EN 4138:2016 (E) 8 4 Designation EXAMPLE Description block SCREW Identity block EN4138D
32、050040AB Number of this standard Hole code (see Table 2) Diameter code (see Table 1) Length code (see Table 1) Drive code (see Table 3) Black colour code (see 3.4) NOTE If necessary the originator code I9005 shall be placed between the description block and the identity block. Table 1 Hole Code with
33、 D without (hyphen) Table 2 Drive Code ISO 14275 None ISO 14276 A 5 Marking See Table 4 and Figure 1. Table 3 Diameter code EN 2424 Style 030 and 040 N 050 to 120 B BS EN 4138:2016EN 4138:2016 (E) 9 6 Technical specification 6.1 General ISO 7689, except for clauses. 6.2 Approval of manufacturers EN
34、9100. 6.3 Qualification of screws EN 9133. BS EN 4138:2016EN 4138:2016 (E) 10 Annex A (informative) Standard evolution form MODIFICATION REASON AND VALIDATION Minus looks like a bullet a references too small Mixture of texts b reference too small Replacement ISO 7994 BY ISO14275 and ISO 14276 Roughn
35、ess symbol inside and above the drawing Add to all symbols: max e.g. Ramax 3,2 Ramax 0,8 Modify symbols according to ISO 1302. BS EN 4138:2016EN 4138:2016 (E) 11 MODIFICATION REASON AND VALIDATION L4is not defined and has no tolerance values. 6.a) Approval of manufacturers: see EN 9100; EN 2000 do n
36、ot exist anymore and replaced by EN 9100 This page deliberately left blankThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is incorporated by Royal Charter. British Standards a
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