1、CEN EN*K27723 93 E 3401.1589 0039773 7 I I EUROPEAN STANDARD NORME EUROPEENNE EUROPAISCHE NORM EN 27721: 1991 Octo ber 199 1 . UDC 621.882.215.091.6:620.1 Descriptors : Fasteners, screws, countersunk head screws, dimensions, dimensional measurements, standard gauges English version Countersunk head
2、screws - Head configuration and gauging (IS0 7721:19831 Vis tete fraisee - Configuration de la tte et vrification par calibre von Senkkpfen (IS0 7721:1983) (IS0 7721:1983) Senkschrauben - Gestaltung und Prfung This European Standard was approved by CEN on 1991-10-10 and is identical to the IS0 stand
3、ard as referred to. CEN members are bound to comply with the CENICENELEC 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
4、may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists 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 C
5、entral Secretariat has the same status as the 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 Europe
6、an Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, E-1050 Brussels (cl CEN 1991 Copyright reserved to all CEN members Ref. No. EN 27721:1991 E .CEN EN827723 93 = 3404589 0039772 9 Page 2 EN 27721:1991 FOREWORD I In
7、1990, IS0 7721:1983 was submitted to the CEN P.Q.-procedure. Following the positive result of the P.Q., CEN/BT agreed to submit IS0 7721:1983 without modifications to Formal Vote. In accordance with the Common CEN/CENELEC Rules, the following countries are bound to implement this European Standard :
8、 Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of the International Standard IS0 7721:1983 was approved by CEN as a European Standard without any modifications.
