Banglii 3" Thread Screw in Office Chair Caster Wheels, 3/8"-16x1(Not Metric M10), Safe for All Floors, PU Rubber Furniture,Carts Stem Caster Wheels,No Scratch,650Lbs Weight Capacity Table Turning Mechanism  (Furniture Accessories, Stainless Steel)

STEM THREAD SIZE:Thread diameter is 3/8"(9.5mm),thread length is 0.79"(20mm),the screw in furniture stem caster wheels is 3/8"-16x1"(NOT METRIC M10,PLEASE MAKE SURE THE SIZE BEFORE PURCHASE.The stem office caster wheel diameter is 3"(75mm). MULTI NUTS CHOCIE:1:Hex Nut(Tighten) 2:Flange Nut(Tighten) 3:Loose Proof Nut(Tighten) 4:Screw Sleeve(Easy Screw),you could choose what nut you want. SAFE FOR ALL FLOORS:High-quality Threaded Stem Office Chair Caster Wheels are wrapped in soft polyurethane material, suitable for all floors including hardwood, laminate, ceramic tile, carpet and bamboo floors, ensuring that no scratches will be left on any surface. SMOOTH&SILENT ROLLING: The entire support frame and ball bearings of caster wheels are made of high-grade steel, which can provide smooth and easy rolling without any squeaking or any noise. FAST&EASY INSTALLATION: No additional installation tools are needed, just need to disassemble the old casters and installation the new wheels, suitable for all kinds of standard seats: office chairs, desk wheels, work stools, dining chairs, tool carts, etc.