$5.25
A lock screw for the Graco Fusion AP and Fusion PC spray guns. Graco's service manual specifies it as a 10-24 x 3/8 in. (10 mm) screw, the exploded parts diagram labels it simply Screw, and Graco's catalogue title calls it a lock screw.
It is listed for both the Fusion AP and the Fusion PC. Fasteners like this are easy to lose during a strip-down, so it is worth adding one to the order when you are already buying seals or cartridges for the gun.
Genuine Graco OEM part 203953.
