Anyone know the dimensions of the GM conical washer? Height, Maj. Dia., Min. Dia, hole dia. Tried the search, nothing. Thanks! :) :usa:

Hole diameter is about 9/16" :D

the hole for the stud is 9/16? is that what your'e saying? (just making sure)

Roughly, yes. The studs are 9/16"-18

GM part # 3965138 Adapter

"Conical Washer"

Max Diameter= 25mm
Min Diameter= 19mm
Height=17.5mm(about 17.5)

Inside diameter=14mm

The "split" down the "height" of the piece measures roughly 2.5mm

Also of note, from the max diameter (TOP) it is a right angle for 2mm, and then it tapers directly to the min diameter.
Not sure if this is important, but might be.
There is also a 1mm to 1.5 mm 45 degree angle cut around the edge, of the top and bottom of the inner hole. Again not sure why this is there..but I'm sure there is a reason.

The GM studs Part# 3965137 are 9/16ths X 3 and 1/16th long.
Thread as mentioned above.

All measurments taken with crappy plastic calipers, by a slightly buzzed guy. :rolleyes:

MJ:flipoff2: