Please Help! 87 chevy TBI fuel line question

[875.3CHEVY]

i think they screw directly in the tbi but they might be the same as them hose ends.ive got new line from the fuel pump to the motor,but i got a 5.3.see if you can screw the ends of the flex into it self and that will tell you if the end of the hose is the same as the tbi.if so them fittings will work.or just compare the male threads on the flexline with male threads on the fuel line.should be o-ring