1/4-20 x 1/2 in.
Samson Series Wheels with brake or without brake are excellent for mix and match for your projects. Outwater's Samson Series, Durable Twin Wheel Caster features durable, black Nylon 6 wheels and hoods, which glide smoothly on hardwood and carpeted floors. Threaded Stem, Swivel Radius of 2-1/8 in.