The TRUE 830221 is a 5-inch swivel caster with a brake and 1/2-13 threaded stem for compatible commercial refrigeration and foodservice equipment. The swivel design allows equipment to move in different directions, while the integrated brake hold the equipment in position when engaged. The 1/2-13 stem provides the specified mounting connection for compatible equipment. https://partsfe.com/casterstem-512-13x1wbrk-for-true-part-830221