1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 1481:2011Slotted pan head tappingscrews (ISO 1481:2011)BS EN ISO 1481:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 148
2、1:2011.It supersedes BS EN ISO 1481:1995 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee FME/9/3, Fasteners - Product Standards.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not pu
3、rport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 68772 3ICS 21.060.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStand
4、ards Policy and Strategy Committee on 31 August 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 1481 August 2011 ICS 21.060.10 Supersedes EN ISO 1481:1994English Version Slotted pan head tapping screws (ISO 1481:2011) Vis tle tte cyl
5、indrique large fendue (ISO 1481:2011) Flachkopf-Blechschrauben mit Schlitz (ISO 1481:2011) This European Standard was approved by CEN on 1 July 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status
6、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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, Germa
7、n). A version in any other language made by translation 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,
8、 Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATI
9、ON COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 1481:2011: EBS EN ISO 1481:2011EN ISO 1481:2011 (E) 3 Fo
10、reword This document (EN ISO 1481:2011) has been prepared by Technical Committee ISO/TC 2 “Fasteners“ in collaboration with Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publicati
11、on of an identical text or by endorsement, at the latest by February 2012, and conflicting national standards shall be withdrawn at the latest by February 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC sh
12、all not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 1481:1994. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bu
13、lgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement noti
14、ce The text of ISO 1481:2011 has been approved by CEN as a EN ISO 1481:2011 without any modification. BS EN ISO 1481:2011ISO 1481:2011(E) ISO 2011 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO memb
15、er bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, government
16、al and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Direct
17、ives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodie
18、s casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 1481 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 1
19、3, Fasteners with non-metric thread. This second edition cancels and replaces the first edition (ISO 1481:1983), which has been technically revised. BS EN ISO 1481:2011BS EN ISO 1481:2011INTERNATIONAL STANDARD ISO 1481:2011(E) ISO 2011 All rights reserved 1Slotted pan head tapping screws 1 Scope Thi
20、s International Standard specifies the characteristics of slotted pan head tapping screws with thread sizes from ST 2,2 to ST 9,5 inclusive. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited
21、applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 225, Fasteners Bolts, screws, studs and nuts Symbols and descriptions of dimensions ISO 1478, Tapping screws thread ISO 2702, Heat-treated steel tapping screws Mechanical properties
22、 ISO 3269, Fasteners Acceptance inspection ISO 3506-4, Mechanical properties of corrosion-resistant stainless steel fasteners Part 4: Tapping screws ISO 4042, Fasteners Electroplated coatings ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C ISO 899
23、2, Fasteners General requirements for bolts, screws, studs and nuts ISO 10683, Fasteners Non-electrolytically applied zinc flake coatings ISO 16048, Passivation of corrosion-resistant stainless-steel fasteners BS EN ISO 1481:2011ISO 1481:2011(E) 2 ISO 2011 All rights reserved3 Dimensions See Figure
24、1 and Table 1. Symbols and descriptions of dimensions are specified in ISO 225. a) Type C b) Type F c) Type R aDimension a shall be measured at the core diameter of the first full thread. Figure 1 Slotted pan head tapping screw BS EN ISO 1481:2011ISO 1481:2011(E) ISO 2011 All rights reserved 3Table
25、1 Dimensions Dimensions in millimetres Thread size ST 2,2 ST 2,9 ST 3,5 ST 4,2 ST 4,8 ST 5,5 ST 6,3 ST 8 ST 9,5Pa0,8 1,1 1,3 1,4 1,6 1,8 1,8 2,1 2,1 a max. 0,8 1,1 1,3 1,4 1,6 1,8 1,8 2,1 2,1 damax. 2,8 3,5 4,1 4,9 5,5 6,3 7,1 9,2 10,7 max. 4,0 5,6 7,0 8,0 9,5 11,0 12,0 16,0 20,0 dkmin. 3,7 5,3 6,6
26、7,6 9,1 10,6 11,6 15,6 19,5 max. 1,3 1,8 2,1 2,4 3,0 3,2 3,6 4,8 6,0 k min. 1,1 1,6 1,9 2,2 2,7 2,9 3,3 4,5 5,7 nom. 0,5 0,8 1 1,2 1,2 1,6 1,6 2 2,5 max. 0,70 1,00 1,20 1,51 1,51 1,91 1,91 2,31 2,81 n min. 0,56 0,86 1,06 1,26 1,26 1,66 1,66 2,06 2,56 r min. 0,10 0,10 0,10 0,20 0,20 0,25 0,25 0,40 0,
27、40 rfref. 0,6 0,8 1,0 1,2 1,5 1,6 1,8 2,4 3,0 t min. 0,5 0,7 0,8 1,0 1,2 1,3 1,4 1,9 2,4 w min. 0,5 0,7 0,8 0,9 1,2 1,3 1,4 1,9 2,4 Type C 2,0 2,6 3,2 3,7 4,3 5,0 6,0 7,5 8,0 Type F 1,6 2,1 2,5 2,8 3,2 3,6 3,6 4,2 4,2 y ref. Type R 2,7 3,2 3,6 4,3 5,0 6,3 lbType C and Type R Type F nom. min. max. mi
28、n. max. 4,5 3,7 5,3 3,7 4,5 6,5 5,7 7,3 5,7 6,5 9,5 8,7 10,3 8,7 9,5 13 12,2 13,8 12,2 13,0 Range 16 15,2 16,8 15,2 16,0 of 19 18,2 19,8 18,2 19,0 preferred 22 21,2 22,8 20,7 22,0 lengths 25 24,2 25,8 23,7 25,0 32 30,7 33,3 30,7 32,0 38 36,7 39,3 36,7 38,0 45 43,7 46,3 43,5 45,0 50 48,7 51,3 48,5 50
29、,0 aP = pitch of the thread. bSizes with lengths marked with a dash () cannot be manufactured. BS EN ISO 1481:2011ISO 1481:2011(E) 4 ISO 2011 All rights reserved4 Specifications and reference International Standards See Table 2. Table 2 Specifications and reference International Standards Material S
30、teel, in accordance with ISO 2702 Stainless steel General requirements ISO 8992 Thread ISO 1478 Steel grade/ hardness class A2-20H, A4-20H, A5-20H Mechanical propertyInternational Standard ISO 2702 ISO 3506-4 Product grade A Tolerances International Standard ISO 4759-1 As processed Finish Coating Re
31、quirements for electroplating are specified in ISO 4042. Requirements for non-electrolytically applied zinc flake coatings are specified in ISO 10683. Additional requirements or other finishes or coatings shall be agreed between the supplier and the purchaser. Requirements for passivation are specif
32、ied in ISO 16048. Acceptability Acceptance inspection is specified in ISO 3269. 5 Designation EXAMPLE 1 A slotted pan head tapping screw with thread size ST 3,5, nominal length l = 16 mm made of steel (St) in accordance with ISO 2702 and rounded end (Type R) is designated as follows: Tapping screw I
33、SO 1481 - ST 3,5 16 - St - R EXAMPLE 2 A slotted pan head tapping screw with thread size ST 3,5, nominal length l = 16 mm made of stainless steel (A4-20H) in accordance with ISO 3506-4 and rounded end (Type R) is designated as follows: Tapping screw ISO 1481 - ST 3,5 16 - A4-20H - R BS EN ISO 1481:2
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