GGG-P-453 Revision A, April 8, 1965
PLATE, SURFACE, CAST IRON
Includes all amendments and changes through Amendment 1, April 23, 1979
This specification covers cast iron surface plates for general inspection and layout work.
This specification does not include all types, grades, and sizes of cast iron surface plates which are commercially available, but only those generally used by the Federal Government.
Surface plates covered by this specification shall be of the following types and grades, as specified (see 6.2):
Type I—Single surface. Grade A—Fine scraped. Grade B—Scraped. Grade C—Fine planed. Grade D—Planed. Grade E—Ground. Type II—Double surface. Grade A—Fine scraped. Grade B—Scraped. Grade E—Ground.