On Thu, 26 Nov 2009 14:43:19 -0600, the infamous "Pete C."
scrawled the following:


I have a BOSS with the micrometer locknut stuck at the bottomed out zero
position. So far Kroil has not released it, nor has considerable torque
applied from channel locks via some 1/8" hard rubber to protect the
knurl.

Non-p/c application of freon 12 to the shaft with heated rubber pads
to the nut? (Keep it away from the plastic base.)

Have you tried moving it back and forth, alternating tightening and
loosening, while attempting to rotate the micrometer (? not familiar
with the Boss)? Sometimes moving both at once can rock it loose.

--
Some days, it's not even worth chewing through the restraints.