Jeep Part Number: 06505549AA About $6 each.
SCREW, SCREW AND WASHER. Mounting. Hex Head. M10 x 1.50 x 73.00. If you at a buy hardware store, get Grade 10.9.
The flag nut is NUT, Track Bar To Axle, Mounting, Hex Flange Lock
Jeep Part Number 06506264AA