Part No. 25-900.084
Size 84. Dellorto SHA, PHBG, PHBH 5mm Brass Main Jet
This jet is used as a main jet for Dellorto SHA, SHBA, SHBC, SHB, PHBD, PHBG, and PHCF carburetors
It is used as a pilot jet for Dellorto PHBE, PHBH, PHBL, PHF, PHM, PHSF, VHSA, and VHSB carburetors.

The thread on this jet is 5mm.
Note. Not genuine part.