Color:Black Size:2" M8 No Brake 4p Standard 5/16" with 18 TPI,Coarse Thread (US): The stud diameter is 5/16",stud length is 0.79"(20mm), and our size is imperial,not metric. If your wheel is metric,M8(8mm) or M10(10mm), this wheel doesn't fit you,pls don't add to cart. Features: 8T8 replacement caster wheels 2'', 5/16'' caster wheels threaded, heavy duty swivel rubber wheels set of 4,double bearings no noise castors 360 Degree Swivel Casters: 4 pieces casters can rotate smoothly & easily to any directions. Made of polyurethane rubber type, swivel caster stems are very quiet running, absorbs shock and vibrations. Good Wear Resistance: The high quality stem casters are specially designed for last performance. Maximum load capacity of single caster is 77LBS(35KG), 300LBS(135KG) for set of 4. Widely Used Application: The wheels with stem can be used for a multitude of applications, including tool boxes,light machinery, cabinets, furniture,flight cases, instrument cases, moving tablb etc.