OPW 634TT-7085-EVR Grey Top Seal Fill Cap

OPW 634TT-7085-EVR Grey Top Seal Fill Cap

Item #634TT-7085-EVR

Tight-Fill Top-Seal Caps are installed on top-seal adaptors, when not in use, to prevent gasoline vapors from escaping and to prevent water, dust and debris from entering the tank. The OPW 634TT is designed to mate with 4" 633T, 633TE, 61SA, 633TC, and 633TCP Top-Seal Adaptors. The 634TT is similar to the 633T, except it does not have internal wrenching lugs. Heavy duty and corrosion resistant.



  • Body is made of Duratuff® to help eliminate rust and oxidation for a long, maintenance-free life.
  • Toggle lever distributes downward pressure to compress its Buna-N gasket evenly, ensuring a positive, water and vapor-tight seal.
  • Can be locked with a padlock or wire seal. 
  • Cap & Links: Duratuff®
  • Pins: Stainless steel
  • Gasket: Nitrile
  • Color: Grey