ISO 9268 INTERNATIONAL STANDARD First edition 1988-12-15 INTERNATIONALORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXKAYHAPOAHAA OPAHM3AUMH O CTAHAAPTW3ALWM Implants for surgery - Metal bone screws with conical under-surface of head Dimensions Implants chirurgicaux -- Vis metalliques a embase conique pour os - Dimensions Refercncce number ISO 9268 : 1988 (E) Not for Resale ISO 9268 : 1988 (E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member 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, govern- mental 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. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 9268 was prepared by Technical Committee ISO/TC 150, Implants for surgery. This first edition cancels and replaces the first editions of ISO 5835-3 : 1986 and ISO 5835-4 : 1983, of which it constitutes a technical revision. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. International Organization for Standardization, 1988 ? Printed in Switzerland ed without license from IHS Not for Resale ISO 9268 : 1988 (E) INTERNATIONAL STANDARD Implants for surgery - Metal bone screws with conical under-surface of head - Dimensions Introduction 2 Reference 0 Iso 6018 : 1987, Orthopaedic implants General require- This International Standard lays down requirements for surgical ments for marking, packaging and labelling. bone screws as given in the Scope. It is necessary to bear in mind that there may be a need for bone screws for particular applications, which are not covered by this Standard or by IsO 5835. Such special bone screws may differ in part from the Code for screw thread standardized forms or may combine parts from these two 3 product Standards. The following code shall be used to identify the type of screws However, there are certain areas of the design of screws such complying with this International Standard : as the drive connections, the shape of the under-surface of the head and the thread form that are critical from the point of view Type of thread Code of use in surgery. These areas are those in which there is an HC Symmetrical thread instruments such as screwdrivers (IS0 8319-2) or taps, drills Asymmetrical thread HD and countersink cutters. No variation is permitted in these areas. Scope and field of application Dimensions and tolerances 1 This International Standard specifies the dimensions and tol- Screws with symmetrical thread form HC 4.1 erances of metal bone screws with conical under-surface of the head used in surgery. 4.1.1 Screws with single-slot drive connection NOTE - The interrelationship of International Standards dealing with Screws with single-slot drive connections shall be as given in bone screws, bone plates and relevant tools is shown for information in figure 1 and table 1. annex A. 1 Copyright International Organization for Standardization ted without license from IHS Not for Resale