bolt with countersunk collar

abuchment aerophysics alternaria bataticola ikata aminocarboxylic acid antinativist chiaroscurist circular diaphragm circulus arteriosus Halleri Elisabethszell genus cebuss heat transfer film coefficient Hφnefoss key agreement malachite green solution merchandise insurance radio-room semirotary davit unsubduedness water-cooled jacket for stuffing box window control block