Used on connecting rods used in fairbanks morse 8 cylinder diesel engines model 38d8 1/8 onboard 140 foot coast guard vessels. 17c solid, plain, no outside flanges
0.3750" first hole diameter 19.6200" overall length one 0.5620 in. dia hole; twelve 0.3750 in. dia holes threaded 0.375-16 unc 2b; twelve 0.7810 in. dia holes; material, mil-b-24059, nickel aluminum