Hirate 2.5" Office Chair Casters Wheel with 3/8"-16UNC Threaded Stem Heavy Duty Caster Replacement Smooth Rolling for Hardwood Floors, Set of 5 with Nylon Lock Nuts

Hirate Smooth Office Chair Casters-No Matter What Surface You Choose, It’s Like Roller Skating At Your Desk. Features: Quiet, wear-resisting, easy to lock and install Floor friendly, would not scratch the floor Rotation: swivel 360 degree. Smooth & Silent Rolling Ball bearings: Double ball bearings, provide max capacity and flexibility Specification: *Measurement System : English Unit(Imperial) *Mounting Type: Stem *Stem Diameter: 3/8" *Stud Length: 0.79"(20mm) *Thread Type: English *Wheel Diameter: 2.5"(63mm) *Wheel Width:0.87" *Installing Height: 3.38" *Wheel Material: Polyurethane *Bracket: High quality steel - galvanizing *Double Bearing: Steel ball bearing *Total Load Capacity: 600 lbs Package Contains: 5 x 2.5" Caster wheels in 3/8"-16x0.79" Threaded stem 5 x 3/8" Threaded Nylon Lock Nuts WARNTING TIPS: THIS IS ENGLISH UNIT STEM 3/8", NOT METRIC, DOESN'T FIT METRIC M10 STEM, PLEASE KINDLY CHECK YOURS BEFORE PURCHASE, THANK YOU.