GGG-B-461 Revision A, August 17, 1966
BLOCK, STEP, MACHINISTS
Includes all amendments and changes through Cancellation Notice 1, November 27, 2012
Additional Comments: CNCL NO S/S
This specification covers step blocks used for clamp supports and set-ups on laboratory and machine shop equipment.
This specification does not include all types of step blocks (machinists') that are commercially available, but is intended to cover only those generally used by the Federal Government.
Step blocks covered by this specification shall be of the following types, as specified (see 6.2):