Specification Brand : Service Caster BulletPoint1 : These Service Caster Series #30 Thermoplastic Rubber Flat Tread on Polyolefin Core casters offer various wheel sizes and mounting heights: 4” wheel: 5-5/8” mounting height; 5” wheel: 6-1/2” mounting height; 6” wheel: 7-1/2” mounting height; 8” wheel: 9-1/2” mounting height. BulletPoint2 : Weight Capacity: 4": 300 lbs Capacity/Caster, 5": 350 lbs Capacity/Caster, 6": 500 lbs. Capacity/Caster, and 8": 600 lbs Capacity/Caster BulletPoint3 : Top plate measures at 4" x 4-1/2" with a bolt hole pattern of 2-5/8" x 3-5/8" to 3" x 3" and can either be bolted or welded on. BulletPoint4 : Brake options include a top lock brake (TLB) and a total lock brake (TTL). The top lock brake (TLB) places a positive locking force against the wheel tread locking the wheel only. The total lock brake (TTL) also places a positive locking force against the wheel tread, but the total lock brake (TTL) simultaneously locks the wheel and the swivel for a complete stationary position. BulletPoint5 : Find other wheel materials, sizes and all Service Caster products at our Amazon Storefront. Click on the “by Service Caster” link above the main title on any Service Caster page listing. Color : Swivel - No Brake - Gray ExternallyAssignedProductIdentifier1 : 670533879437 ExternallyAssignedProductIdentifier2 : 0670533879437 ItemName : Thermoplastic Rubber Flat Tread Swivel Top Plate Heavy Duty Caster with 4 Inch Wheel – 300 lbs. Capacity/Caster - Service Caster Brand ItemPackageDimensions_Height : 5 inches ItemPackageDimensions_Length : 6 inches ItemPackageDimensions_Width : 5 inches ItemPackageQuantity : 1 ItemTypeKeyword : plate-casters LoadCapacity : 300.0 pounds Manufacturer : Service Caster Material : Thermoplastic Rubber Tread on Polyolefin Core ModelNumber : Series #30 MountingType : Plate Mount NumberOfItems : 1 PartNumber : SCC-30CS420-TPRRF ProductDescription : Listing is for one (1) Service Caster Series #30 swivel caster with a 4" diameter, 2" wide thermoplastic rubber tread on polyolefin core wheel. Supports 300 pounds (lbs) per caster.When searching for a reliable and durable solution for medium and heavy duty projects, consider Service Caster’s Series 30 top plate thermoplastic rubber flat tread on polyolefin core casters. The soft flat tread is made of thermoplastic rubber that is non-marking and non-marring, and on the polyolefin core provides a long lasting, high capacity wheel that is capable of easy rolling under heavy loads. Finely crafted with double ball bearing heat treated raceways, these versatile casters are ideal for a wide range of applications, such as dollies, platform trucks, warehouse carts and freight terminals. Or ensure a smooth and secure ride for food service carts, hotel housekeeping carts, and industrial and commercial equipment. Even drywall carts, welding carts, and wall panel carts will be ready to roll on the Series 30, keeping you moving forward. Service Caster is unsurpassed in quality, reliability, and excellent customer service. Count on us to move you forward. ProductSiteLaunchDate : 2018-11-06T20:50:21.048Z Size : 4" Wheel SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation : Multi-Surface UnitCount : 1 UnspscCode : 31162702