Used on pump assy, turbo-jet engine. ends not straight, mtg holes are center radius 2 extrusions along w rectangular w/ or w/o mtg holes (incl square) (basically flat)
2a external thread class right-hand external 1.000" overall length 20 external thread quantity per inch plug, tube fitting flareless (note: drilled hole is optional should not be considered as a separating characteristic un external thread series