Bottome bracket wont install

Heyy guys ive just bought myself a new bottom bracket 68mmx103mm and it will not screw all the way into my frame. I screw as far a possible but it is really tight and will not go any further, so im left with about 3-5mm sticking out on each side. Any help thanks.

What brand is the bottom bracket? Sealed or unsealed? Did you measure your BB shell?

please delete, all good figured it out sorry