This item is an NOS GM TH200, TH200/C, TH325, TH325-4L Transmission Forward Clutch Housing to Output Shaft Thrust Washer, part # 8628440, gr. 4.176. (plastic) .068" 1.66-1.77mm (white #1). This is a Brand New Genuine GM part.
Please check my other auctions for more Classic and Hi-Performance Auto Parts and Literature.