Gruvlok End Guard fittings are fabricated from extra heavy (XS) materials. The groove conforms to Gruvlok End Guard cut grooving specification. These fittings may be used for high pressure systems and where lined or coated fittings are required. Gruvlok EG fittings conform to NACE STD-RP-04-72 (Contact an ASC Engineered Solutions™ Representative with specific service details). End Guard fittings should only be used with Series 7004 Couplings and EG Gasket.