If you are tearing the whole axle apart and can clean out shavings from the inside, I'd say thread the hold and then put a bolt in it. This way, if you ever add an air locker or other actuated locker, you can just pull the bolt and not worry about having weird threads in the housing.
If you are NEVER going to use a locker, jusst stick a self tapper in there and you should be fine (I'd still thread it though, IMO.)
'97 Forest green. ~6" total lift, 8.8, etc. 36" TSL's, winch. You get the drill.
you could buy a vacuum cap at Autozone. Then its nothing permanent. If your worried about it coming off put a clamp on it.
[COLOR=Navy][SIZE=2]03 Patriot Blue Sport[/SIZE][/COLOR]
Rubi d44 both ends, Crane Diff Covers, Rock trac t-case
Tom Woods CV DS, Alloy USA rear axles (waiting for install) ARB front bumper, Rock-it-Man Rockers
knoblock rear bumper, OBA in process,
bestop tire carrier, 35-12.5-16 trXus MT's on MOABs with 1.25 spidertrax
Currie HD steering
Nth Degree 6" LA kit. Garvin Wilderness Rack w/hi-lift mnt
HEMI & 5spd Auto