Description H Series 7.3 Cu In. Displacement1" Key shaft4 BOLT STD - 44.40 [1.748] DIA. X 3.05 [.120] PILOT, .375-16 UNC-2B MOUNTING HOLES ON 82.55 [3.250] DIA. B.C..875-14 UNF-2B SAE O-Ring Ports Genuine Char Lynn 101-1751