1、STD-BSI BS EN 3304-ENGL 1997 = Lb2LibbS 05bbLi b7-m BRITISH STANDARD AEROSPACE SERIES Screws, 100“ countersunk reduced head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, Mos2 lubricated Classification: 1100 MPa (at ambient temperature) / 315 “C Th
2、e European Standard EN 3304 : 1996 has the status of a British standard ICs 49.030.20 BS EN 3304 : 1997 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 3304 : 1997 AmdNo. Committees responsible for this British Standard Date Text affected The preparation of this British
3、standard was enmsted to Technical Committee ACW12, Aerospace fasteners and fastening systems, upon which the following bodies were representea Associon of Eectronics, Telecommunications and Busines Equipment Industries British Indusiai Fasteners Federation Minisby of Defence Society of British Aeros
4、pace Companies Ltd. This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 16 February 1997 Q BSI 1997 Amendments issued since publication The foiiowing BSI references reiate t
5、o the work on this standard: Committee reference ACW12 Draft for comment 9W4426 DC ISBN O M#) 27026 4 Contents page Commiaees responsible inside front cover Nationai foreword ii Foreword 2 Specification 1 sccw 2 Normative references 3 Required- * cs 4 Designation 6 Marking 6 Technidspecificaon 7over
6、sized - bolts * * M STD-BSI BS EN 3304-ENGL 1997 Lb2LibbS 058bb50-ZZb BS EN 3304 : 1997 O BSI 1997 i I BS EN 3304 : 1997 National foreword This British Standard has been prepared by Technical Committee ACW12 and is the English ianguage version of EN 3304 : 1996 Am- series - - application : EN 2491,
7、5 pn to 10 pm. STD-BSI-BS EN 3304-ENGL 1777 1b24bb7-58bb5b 744 Page 5 EN 3304 : 1986 x O U r O (I 0) U L s m - Y m m .sO T .o01 STDOBSI BS EN 330q-ENGL 1797 Lb24bb7 058bb57 bBO Page 6 EN 3304 : 1996 “. -I O O0 I O0 “I I I I I e o I2 E P Q O Y c 2 (J o k 2 8 2 E s t Q e O C o E c 4 o) o O Y a U c O Q
8、 O 0 ea c - STD.BS BS -EN 330q-ENGL 1997 Lb29bb 058bb58 517 4 Designation EXAMPLE : Description block SCREW Page 7 EN 3304 : 1996 I Identity block Number of this standard Hole code (see table 2) Diameter code (see table 1) Length code (see table 1) Drive code (see table 3) Lubricant code (see 3.4) N
9、OTE : If necessary, the code 19005 shall be placed between the description block and the identity block. Table 2 without Table 3 Drive -T Code I IS0 7994 I R I IS0 7994 unribbed A l 5 Marking See table 4 and figure 1, indented. Table 4 I EN 2424 I Stvie Diameter code I 040 -1 - N 1 I 050to 200 I C+M
10、J STD*BSI BS EN 330i-ENGL 1997 Lb2LibbS 058bb59 i53 W Page 8 EN 3304 : 1996 6 Technical specification IS0 91 52, with the following modifications : 6.1 Approval of manufacturers EN 2000 6.2 Qualification of screws EN 3042 6.3 Requirements deleted - Double shear strength ; - Recess removal torque res
11、istance in acceptance. 7 Oversized bolts EN 4016 BS EN 3304 : 1997 List of references see national foreword. 6 BSI 1997 BS EN 3304 : 1997 BSI 389 ckjwick I Fax 0181 996 7400. BSI offers members an individual updating sewice called PLUS which ensures that subscribers automaticaUy receive the latest e
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16、ight, Designs and patents Act 1988 no extract may be reproduced, stored in a redeval system or transmiw in any form or by any means - electronic, photocopying, recording or otherwise - without prior written permission from BSL This does not preclude the free use, in the course of implementing the st
17、andard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implemen-on then the prior written permission of BSI must be obtained If pennission is granted, the terms may include roya payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager, BI, 389 Chiswick High Road, London W4 4AL ISBN O 580 27026 4 ACW12
