8T8 3 Inch Rubber Caster Wheels Heavy Duty with Brakes, 5/16"-18 x 1 Threaded Stem Casters Set of 4 (Screw Diameter 5/16", Length 1"), Quiet and Smooth Rolling Castors for Furniture Hardwood Floors

Important:The threaded stem size is 5/16"-18UNC x 1", Thread (US), the stud diameter of this wheel is 5/16",stud length is 1"(20mm), and it's imperial, not metric. It doesn't fit M8 pitch . Imperial 5/16"x18 TPI fits better. Specification Wheel Material:Polyurethane Rubber Stem Diameter:5/16 inch (10mm) Stem Length:1 inch (20mm) Safe for All Floors: Working great for all kinds of floors including hardwood laminate, tile vinyl, stone, marble, concrete, carpet, rug and bamboo flooring.

• 【Stem Casters Size】Pu Wheel Diameter: 3 Inchs, Threaded Stem Diameter: 5/16 Inch (10mm), Stem Height: 0.79 Inch (20mm). PLEASE NOTED: It's Not Metric M8 Thread.
• 【Heavy Duty Swivel】Made of high quality rubber with strong wear resistance,and precision sealed ball bearing for quiet and smooth operation. Each wheel can bear 150 lbs, Set of 4 can load up to 600 lbs.
• 【Dual Brakes Design】Set of 4 caster wheels with double locking brake. Push the Brake to lock the caster. When the caster is locked. It stops both Swiveling and rolling. In locking States. The caster is not able to swivel or roll. Omnidirectional protecting your objects.
• 【Smooth & No Noise】Made of Polyurethane and Steel, roll quiet and no scratch on floor, PU rubber wheel will keep quiet movement on hard wood floor without scratch,wear-resistant and no noise.
• 【Various Application】This heavy duty caster can be used in multi-place such as furniture tables chairs, home improvements, industrial flitting, shopping carts. Especially for heavy objects like metal shelving, Fitness Equipment,heavy cutoff saw,mobile bed tray etc. Save energy using rolling instead of carring.