Home > Products > Couplings & Accessories > Two Bolt Super High Pressure Couplings SUPER HIGH PRESSURE TWO BOLT COUPLINGS Couplings have a working pressure of 300 bar (4351psi). Couplings are assembled with grade 8 bolts. Factory Part Numbers Recomended Components Warranty Factory Part Numbers Part Number Size End Type Working Pressure bar / psi Shipping Weight lbs. / kg. C50BBD-HP 5" Hevi-Duty™ 300 / 4351 19.5 / 8.8 C60BBD-HP 6" Hevi-Duty™ 300 / 4351 22.5 / 10.2 C60BBEFI-HP 6" Schwing Male / Female 300 / 4351 50 / 22.7 Recomended Components Warranty 3-year limited warranty on mechanical and structural components 2-year limited warranty on gasoline and diesel engines 2-year limited warranty on electrical and hydraulic systems 10-year limited warranty on exclusively designed ‘double ball’ slewing ring