7325.99.10 | 00 | Other cast articles of iron or steel. - Other: - Other - The following, to be employed in the exploration, discovery, development, maintenance, testing, depletion or production of oil or natural gas wells or potash or rock salt deposits:
Flanged casing heads;
Screwed casing heads for surface casings of an external diameter exceeding 273 mm, or rated for service in working pressures exceeding 14 MPa W.O.G. (water, oil, gas) | KGM | Free | CCCT, LDCT |