Sentinel stocks the most complete line in the industry of 8" base and flange configurations for both thief and gauge hatches to meet any need you have in the shop or in the field:
  • API 16 hole bolt circle  (locking or non-locking)
  • ANSI 8 hole 150# bolt circle
  • 8" Weld-on base
  • API 16 hole bolt circle with weld-on flange
  • Adapter plates for obsolete oblong hatches