This is a direct OEM replacement screw used on all 1377/1322, 2240/2250 plastic and steel breeches.
These replacement screws are thread matched to mate perfectly with the main tube on both the 2240 and 1377/22 platform airguns.
Be wary of other replacement screws that are not a Crosman OEM part.
Others may be “small” screws, however we have seen many so-called replacement screws that are said to work.
Only to find that they are the incorrect threads and they will strip out and damage your main tube.
1) 4-48 breech screw
1) .05 hex wrench