Deuce wheel studs
Personally, I would not use the Napa studs unless I was broke down somewhere, and needed them now.
In the following pic is the stud I removed on left, and Napa stud on right. See where the serrations are. With the Napa ones there's very little serration engagement in the drum/hub.
I took them all back to Napa. (6R's, 6L's)

The ones I got from Big Mikes are identical as the removed ones.
RH one in this pic.

Here's the Napa/O'Reilly's PN's numbers if you want them.
These were valid #'s 2 month's ago
NAPA / O'REILLY'S DEUCE WHEEL STUDS/NUTS
NUTS:
(Front/Singles)
LH - WA2007 WA07-5021
RH - WA2006 WA07-5020
STUDS:
LH - WA1211 WA07-6035
RH - WA1210 WA07-6034
Rear Duals...
LH Inner WA2001 WA07-5025 BUDD NUT/STUD
RH Inner WA2000 WA07-5024 BUDD NUT/STUD
LH Outer WA2011 WA07-5023 BUDD NUT
RH Outer WA2010 WA07-5022 BUDD NUT