Colin Usher's Home Page
Return to Colin Usher's Engineering Web Page
Engineering Data - Comprehensive Thread Data
Engineering Data - Drill Sizes for Self Tapping Screws
Engineering Data - Spanner Jaw Sizes includes Hex Socket Screws
This site was last updated on the 17th February 2006
Text © Colin Usher 2007 Illustrations © Colin Usher 2007
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical or photocopying, recording or otherwise without the prior permission of the copyright holder. Except for private & non-profit use.