primer punch rocker arm guide screw?

[Kirk A]

During the course of cleaning my latest Universal, I encountered a fastener whose function eluded me. On the bottom of the base, adjacent to one end of the primer punch rocker arm (45) is a very small machine screw with an oversize washer.  This edge of this washer is in close proximity of the rocker arm, but the screw/washer appears to serve no purpose. And despite my subject, no, I don't really think this is a "guide" of any kind, nor is there any wear to indicate so.

Would anyone care to enlighten me regarding what purpose this serves?

Thanks,
-Kirk

[askimball (Doc)]

It restricts the Primer Punch Rocker Arm from Falling below the bottom of the base.....

I'm going to update what I stated about that Screw & Washer,,,After deep thought I concluded that it keeps the
PRIMER PUNCH from dropping down below the bottom of the Steel Floor Base..

If Interested, the Data on the 2 parts..

Specs:
SCREW:
Slotted Fillister = 6-32 x 6/32"
WASHER:
Diameter = .375 OD
Screw Hole = .136"
Thickness = .038 varies