WT designation on heel of neck?

[PDC]

Looking at a very clean used Warmoth neck.  On the heel it has the initials WT right after the fret wire designation (6100WT) I know SS is for stainless.  Any ideas what the WT denotes?
Thank You!

 

[Knorris]

That is the description of your nut. You should have a White Tusq nut.

 

[PDC]

That’s exactly what’s on this neck! Thank You!