Double Threaded Bulkhead Question

[StevenAkaProek]

I'm purchasing a 1 inch Double Threaded Bulkhead

I would like to add a hose barb fitting(male adapter) to one of the ends

My insert is 1 inch

what size MPT would I need to purchase? to screw onto the bulkhead?

FT7345 Insert Fitting - 3/4 inch MPT x 1 inch Insert
FT7355 Insert Fitting - 1 inch MPT x 1 inch Insert
FT7375 Insert Fitting - 1-1/2 inch MPT x 1 inch Insert

http://www.marinedepot.com/ps_AquariumPage~PageAlias~plumbing_parts_fittings_hose_barb_hosebarb.html