1 –  LEAD SCREW NUT
#F2531
ESTATE FIND!         Used brass nut for linear motion. Discoloration and dings from use and open storage. Brass/bronze body is solid and intact, threads appear to be good upon visual inspection.
Maker and screw size is unknown. Approx measurements are:  Flange – 3.5″ diameter x 1/2″ thick;  Neck/Shaft – 1-15/16″ diameter x 1-7/8″ long;  Total Length – 2-3/8″;  Screw Hole – 1-1/8″ inside diameter,  1-1/4″ outside diameter.
This listing is for one nut. Last pic shows the two nuts available at the beginning of this listing.
CONTACT ME WITH ANY QUESTIONS, COMMENTS, OR CONCERNS.