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Gruvlok Fig. 7377 is a flexible coupling utilizing double groove technology designed for high pressure piping applications. Fig. 7377 is specifically designed for use in mining, oil, gas, slurry, sludge, and hydraulic systems. The maximum working pressure for each pipe schedule and size are listed in the table below. Fig. 7377 is an ideal solution for high pressure applications, exceeding Anvil’s Fig. 7004 capabilities. See page 3 for double groove piping dimensions.
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Unit of Measure
Items
7377EG Gruvlok® Double Groove Coupling

7377EG 6 DBL GRV EG T GSKT CPL
7377EG Gruvlok® Double Groove Coupling

7377EG 8 DBL GRV EG T GSKT CPL
7377EG Gruvlok® Double Groove Coupling

7377EG 10 DBL GRV EG T GSK CPL
Type N/A Installation Coupling
Style N/A Grooved
Nominal Size N/A 6 in N/A 8 in N/A 10 in
Housing Material N/A Ductile Iron conforming to ASTM A 536, Grade 65-45-12.
Coatings N/A Rust inhibiting paint – Color: Orange (standard)
Gasket Material N/A Grade “T” Nitrile (Orange color code)
Gasket Type N/A End Guard
Heavy Hex Nut N/A ASTM A563, Grade A, Zinc Electroplated
Lubrication N/A Gruvlok XtremeTM
Min. Service Temperature Range N/A -20 ºF
Max. Service Temperature Range N/A 180 ºF
Max. Working Pressure - Schedule 160 N/A 4000 psi N/A 3500 psi N/A 3000 psi
Max. Working Pressure - Schedule 80 N/A 3000 psi N/A 2500 psi N/A 2500 psi
Max. End Load - Schedule 160 N/A 137886 lb N/A 204492 lb N/A 272288 lb
Max. End Load - Schedule 80 N/A 103415 lb N/A 146060 lb N/A 226906 lb
Min Specified Torque N/A 450 lb·ft N/A 500 lb·ft N/A 500 lb·ft
Max Specified Torque N/A 525 lb·ft N/A 600 lb·ft N/A 600 lb·ft
Coupling Bolts Size N/A 1 x 5 1/2 in N/A 1 1/8 x 6 1/2 in N/A 1 1/8 x 6 1/2 in
Coupling Bolts Qty. N/A 4
Product Number N/A 0390010502 N/A 0390010528 N/A 0390010544
UPC Code N/A 66242880056 N/A 66242880055 N/A 66242880054
HPH Code N/A 605GR7396 N/A 605GR7396A N/A 605GR7396B
Weight N/A 42.6 lb N/A 72 lb N/A 98.3 lb