lock nut
I was not able to find original equipment, I like the way they incorporated the washer into the nut and it works great!
AMC 20
Dana 30
Dana 35
Ford 9.75
Ford 10.25
Ford 10.5
DIFFERENTIAL:
&
NP208
NP219 NP228 NP229
NP241
NP242
NP243
NP247
NP249
TRANSFER CASE:
OUTPUT YOKE NUT
DIFFERENTIAL Applications: