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1、INTERNATIONAL STANDARD IS0 12260 First edition 1996-l l-01 Aerospace - Screws, pan head, internal offset cruciform ribbed or unribbed drive, stepped shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa - Dimensions Akronaut
2、ique et espace - Vis B t&e cylindrique, B empreinte cruciforme d&POP&e, avec ou sans saillies antidbapantes, 2 fist dkgag6 et filetage MJ court ou de longueur moyenne, en matbriau m&al/ique, rev&tues OIJ non rev&es, des c/asses de rhistance infkrieures ou &gales B 1 100 MPa - Dimensions Reference nu
3、mber IS0 12260.1996(E) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:47:16 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 12260:1996(E) Forewo
4、rd IS0 (the International Organization for Standardization) is a worldwide fed- eration of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a techn
5、ical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
6、electrotechnical standardization. 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 bodies casting a vote. International Standard IS0 12260 was pr
7、epared by Technical Committee lSO/TC 20, Aircraft and space vehicles, Subcommittee SC 4, Aerospace fastener systems. 0 IS0 1996 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including
8、photocopying and microfilm, without permission in writing from the publisher International Organization for Standardization Case Postale 56 ? CH-1211 Geneve 20 ? Switzerland Printed in Switzerland ii Copyright International Organization for Standardization Provided by IHS under license with ISO Lice
9、nsee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:47:16 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD 0 IS0 IS0 12260:1996(E) Aerospace - Screws, pan head, internal offset cruciform ribbed or unribbed drive, stepped shank, sho
10、rt or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa - Dimensions 1 Scope This International Standard specifies the dimensions of pan head screws with internal offset cruciform ribbed or unribbed drive, stepped shank, short or me- di
11、um length MJ threads, in metallic material, coated or uncoated, with strength classes less than or equal to 1 100 MPa. This International Standard is applicable to the compi- lation of aerospace product standards. 2 Normative references The following standards contain provisions which, through refer
12、ence in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to in- vestigate the possibility of applying th
13、e most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid In- ternational Standards. IS0 286-2:1988, IS0 system of limits and fits - Part2. Tables of standard tolerance grades and limit deviations for holes and shafts. IS0 3353:1992, Aerosp
14、ace - Rolled threads for bolts - Lead and runout requirements. IS0 5855-2:1988, Aerospace - MJ threads - Part 2: Limit dimensions for bolts and nuts. IS0 7913:1994, Aerospace - Bolts and screws, met- ric - Tolerances of form and position. IS0 14275:-l), Aerospace - Drives, internal, offset cruciform
15、, ribbed - Metric series. IS0 14276:-l), Aerospace - Drives, internal, offset cruciform - Metric series. 3 Configuration and dimensions See figure 1 and table 1. Dimensions and tolerances are expressed in millimetres. They are applicable after any surface coating, but before the application of any l
16、ubricant. Tolerances of form and position are specified in IS0 7913. 1) To be published 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:47:16 MDTNo reproduction or networkin
17、g permitted without license from IHS -,-,- IS0 12260:1996(E) 0 IS0 Break sharp edges 0.1 to 0,4 R / t /J ! A A 0 _ 4” _.a .-.- .-. .-.- 4” 1 0” 8 a 8 g 8 1 _-.-. I I) I I) Shape optional Figure 1 Table 1 4 D2 4 D4 biameter code Thread 1) h12*) min - t.3 “Orn toI fU.3 080 MJ8x 1 - 4h6h 66 14.7 16 6,2
18、 100 MJlOx1,25 - 4h6h 8.3 18.7 20 7.9 120 MJ12x1.25-4h6h 10.3 22.7 24 9,8 I) In accordance with IS0 5855-2 !) See IS0 286-2 $1 Increments: 1 for Lt c 30 2for30 100 I) In accordance with IS0 14275 or IS0 14276 T 4 E K 7- L, 3) L2 rR I T I I Thread 1 Drive to1 max min code41 1.6 0.4 R4 2 0.5 R5 -00.2
19、2,4 0,6 R6 2.8 0.7 3.2 0.8 R8 4 1 RlO - :,J 4.8 1.2 R12 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:47:16 MDTNo reproduction or networking permitted without license from
20、 IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:47:16 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 12260:1996(E) ICS 49.040.20 Desc
21、riptors: aircraft industry, fasteners, threaded fasteners, MJ threads, screws, pan head screws, cross recessed screws, offset-cross recessed screws, dimensions, dimensional tolerances Price based on 2 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 20:47:16 MDTNo reproduction or networking permitted without license from IHS -,-,-