Used on turbine, steam, mn, fd, pmp. 0.563" hole diameter 4.625" outside diameter 4 bolt hole quantity the 4 bolt holes are equally spaced on the bolt circle circular
Used on valve,check,swg,5.00 ips 250psi flg brz. 0.688" hole diameter 10.063" outside diameter 10 bolt hole quantity gaskets shall be "oil-free" (i.e., not to be dipped or impregnated but can have small amounts of oil in fibers) -- check notes no's 18 circular