Rockler Screw-On Tee Nuts 3/8-Inch x 16 TPI, 8 Pack
Oajen leveling glide, pack of 16, 1-1/8" base, 5/16" - 18 x 1" thread, leveler, leveling foot
E-Z Lok Threaded Insert, Zinc, Hex-Flanged, 3/8"-16 Internal Threads, 25mm Length (Pack of 25)
Oajen metal threaded star type insert adapter for 1-1/4" OD square tubing, 3/8" - 16 thread, pack of 20
Plastic Leveler Glides, set of 4