The new issue of James Walker’s ‘O’
Ring Guide is available to industrial
users and specifiers of ‘O’ ring
sealing systems.

New to Issue 6 is the range of BS
EN ISO 3601-1 rings, including
aerospace sizes with their tolerances.

Other ranges covered are inch and
equivalent metric sizes to BS 1806
and SAE AS 568, both of which are
still widely referenced by industry
worldwide. Charts for BS 4518
metric sizes, JW Chart 17000 inch
sizes, originally developed by James
Walker for the British Royal Navy,
and non-standard rings, are also given.

Issue 6 is downloadable in PDF
format from www.jameswalker.biz. It
is also available as a printed brochure.