MIL-STD-1258(WC)
30 June 1972
DEFINITIONS
3.
3.1 For the purpose of this standard the following definitions
shall apply.
3.1.1 Borescope. A precision optical instrument with self-contained
illuminator used for the visual examination of the internal surfaces of
barrel bores.
3.1.2 Blister. An enclosed raised spot on the surface of chromium
plate where the chromium has failed to adhere to the base metal because
of entrapped gases or inadequate surface preparation.
3.1.3 Electrode Burn. A rough or otherwise unsatisfactory area on
one side of the barrel bore produced by the application of an excessive
current density to that area. This excessive current density area is
caused by an off center electrode.
3.1.4 Flaking or Peeling. Chiplike pieces of chromium plate that
have separated partially or wholly from the base metal.
3.1.5 Frost. A multitude of small, closely-packed nodules on the
surface of the chromium plate giving it a mild rough appearance which
resembles frost.
3.1.6 Inclusion. Particles of impurities that occur in the steel
as intermittent or joined globules or streaks along the longitudinal
axis of the barrel.
A small, somewhat rounded mass of chromium deposit
3.1.7 Nodule.
of irregular shape.
A small cavity in the surface of the chromium plate.
3.1.8 Pit.
3.1.9 Normal Visual Inspection. Visual examination of the interior
surfaces of a barrel bore without the aid of optical instruments.
3
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business