No. 1

Two box spanners for nuts measuring 5/32" and 7/32" across flats, the smaller one being fitted inside the larger.  For nuts fitted on G.E.C. Co.ís manual-type relays.

No. 2

Four box spanners, mounted in star form, for nuts 5/32", 3/16", 7/32" and 1/4". The length of each spanner is 7/8".

No. 3

Tubular spanner, 5.25" long, through the inside of which is fitted a box spanner 7" long fitted with a fixed tommy bar.  For nuts 1/2" and 5/16" across flats. Provided for armature-back-stop nut and locking nut fitted on S.T. & C. Co.ís by-path uniselectors.

BACK Home page BT/GPO Telephones Search the Site Glossary of Telecom Terminology Quick Find All Telephone Systems

Last revised January 01, 2008