Groco 2-256 Buna-N Sight Glass O-Ring for ARG Series Raw Water Strainers

The Groco 2-256 is a replacement Buna-N rubber O-ring designed to seal the sight glass on Groco ARG and BVS Series raw water strainers. This O-ring seats between the strainer head and the sight glass, providing a leak-free seal that keeps the strainer performing reliably in demanding marine environments.

Key Features:

• Material: Buna-N synthetic rubber — resistant to oil, fuel, and seawater
• Dimensions (ID × OD × Thickness): 5.75" × 6.00" × 0.125"
• Direct OEM replacement for Groco ARG and BVS Series strainers
• Compatible with ARG-1500, ARG-2015, ARG-2500, ARG-2520, ARG-3000, ARG-3015, ARG-3020, ARG-3025 and related models
• Sold individually for on-demand replacement

Groco recommends replacing this O-ring every time the sight glass is serviced or replaced to maintain a proper seal and extend the life of your strainer assembly. Keeping a spare on board ensures you're always ready for quick, tool-free maintenance.