Imperial Stem Size: Our caster are standard 5/16" with 18 TPI,Coarse Thread (US), the stud diameter is 5/16" and the stud length is 0.79"(20mm), if your stem socket is METRIC M8, this caster do not fit.
2 Pack Single Lockable Casters: The package includes 2 Standard caster and 2 CASTERS constructed with brake pedal, it can brake the rotation of the caster only, but the stem is still moveable for direction.
Valuable Purchase:The package comes with set of 4 caster (2 with Brake, other 2without) and few 5/16"-18 thread Nylon Lock Nuts.
Versatile Casters :Transform your flight cases, instrument cases, display equipment, dollies, tool boxes, light machinery, and furniture into practical pieces that can be moves with ease using our premium set of 4 caster
Quiet & Smooth Rolling : Made of high-tech elastic polyurethane, with internal bearings are quick rolling and the surface is sleek,wouldn't get stuck by crumbs,hair, wouldn't damage on floors.