The Service Caster Series #20 is ideal for light and medium duty material handling, carts, equipment, and shop projects. Finishes are available in either zinc plating, which provides durability under any condition, or stainless steel, which resists rust and corrosion in indoor or outdoor applications where moisture is a factor. Mounting options include top plate, bolt hole, square stem, grip ring stem, standard and metric threaded stem sizes, as well as a variety of different expanding stem sizes for easy installation into round or square tubing. All rolling on a finely crafted ball bearing design that keeps you moving forward. About Service Caster For over 30 years, Service Caster has been one of the largest caster and wheel companies in North America. We design, manufacture, assemble, and distribute casters worldwide from our location in West Reading, Pennsylvania. Trust us to assist you with selecting, designing, and integrating casters into your application. Choose from a wide range of casters and wheels designed for light to extra heavy duty use from our extensive catalog of over 200 brands, including the Service Caster brand. Series 20 Light Medium Duty Casters The Service Caster Series #20 offers excellent suitability for handling light to medium-duty loads in various settings. You can choose from two finishes: zinc plating or stainless steel for protection against rust and corrosion. Mounting options include: top plate, bolt hole, square stem, grip ring stem, standard, and metric threaded stem sizes, as well as a range of expanding stem sizes for hassle-free installation into round or square tubing. Attributes For Series 20 Casters Wheels Sizes - 3", 3.5", 4", 5", 6" Brake Types - Top Locking, Total Locking, Posi Locking Attachments Types - Top Plate, Bolt Hole, Threaded Stem, Expanding Stem, Square Stem and Grip Ring Stem Wheel Types - Glass Filled Nylon, High Temp Glass Filled Nylon, Hard Rubber, Nylon, Phenolic, High Temp Phenolic, Polyolefin, Polyurethane, Solid Poly, Soft Rubber, Semi Steel and Thermoplastic Rubber Finishes - Zinc Plating, Stainless Steel or 316 Stainless Steel Top Plate Provides the utmost stability by supporting the caster at four points. Available in rigid and swivel, with optional top lock, posi lock or total lock brakes. Bolt Hole Features a 1/2” hollow rivet bolt hole that provides secure fastening for a variety of bolt threads. Bolt holes are available in swivel only, with optional top lock, posi lock or total lock brakes. Threaded Stem Locks caster into place for a solid, secure fit. Threaded stems come in standard 1/2” and 3/8” diameters and metric 12mm and 10mm diameters. Because of these variations it’s important to measure accurately via a thread gauge. Threaded stems are available in swivel only, with optional top lock, posi lock or total lock brakes. Grip Ring Stem Designed to securely fit into the socket of a chair or furniture leg. The grip ring is often made of metal and has ridges or teeth that allow it to firmly lock into place once inserted into the socket. This design provides stability and prevents the caster wheel from coming loose during use. Grip ring stems are available in swivel only, with optional top lock, posi lock or total lock brakes. Square Stem Engineered to be attached to other components through bolting, welding, or riveting. They can be bolted onto the inside of angled iron legs or secured against any flat surface, providing a solid connection and reinforcement. Square stems are available in swivel only, with optional top lock, posi lock or total lock brakes. Other Series 20 Wheel Types Other Polyurethane Colors Besides gray, polyurethane is also available in blue, black, maroon and red. Non-marking and non-marring, polyurethane performs especially well on hard surfaces such as concrete, tile, and wood. Other Series 20 Wheel Types Phenolic Resistant to impact damage, water, oil and grease. Non-metallic and spark proof. Other Series 20 Wheel Types Thermoplastic Rubber Soft, quiet and non-marking wheels perform especially well on hard surfaces such as concrete, tile, and wood. Other Series 20 Wheel Types Hard Rubber Provide higher load capacities and impact resistance than comparable wheels and resistant to most chemicals and oils. Solid Polyurethane Non-marking, non-marring polyurethane wheel molded as one solid piece. Will not flatspot or debond, ensuring a smooth and solid roll over long periods of time. Soft Rubber Resistant to most chemicals and oils- combine a soft tread on a hard rubber core, offering quiet movement and a cushioned ride. Nylon Provide very low rolling resistance, show a high resistance to many aggressive substances and resistant to most chemical and oils, and under normal operating conditions are maintenance free. Phenolic Hi Temp Ideal in high temperature baking environments. Resistant to impact damage, water, oil and grease. Non-metallic and spark proof. Series 20- Light Duty Series 30- Heavy Duty Series 92- Extra Heavy Duty Series 100- Pneumatic amazon.com/servicecaster Add to Cart Add to Cart Add to Cart Add to Cart Buying Options Customer Reviews 4.4 out of 5 stars 35 4.8 out of 5 stars 117 4.6 out of 5 stars 9 4.3 out of 5 stars 282 — Price $24.90$24.90 $40.61$40.61 $616.67$616.67 $44.49$44.49 — no data Weight Capacity 300 lbs. to 350 lbs. 600 lbs. to 1,000 lbs. 2,000 lbs. to 3,500 lbs. 200 lbs. to 450 lbs. no data Top Plate Dimensions 2.5" x 3.625" 4" x 4.5" 5.25" x 7.25" 4" x 4.5" no data Wheel Sizes 3", 3.5", 4", 5",6" 4", 5", 6", 8" 6", 8", 10", 12" 6", 8", 10", 12" no data Brake Types Top Lock, Posi Lock Brake, Total Lock Top Lock, Total Lock, Bolt On Swivel Lock Side Lock, Bolt On Swivel Lock Top Lock, Side Lock, Bolt On Swivel Lock no data Attachment Types Top Plate, Bolt Hole, Grip Ring Stem, Threaded Stem, Expanding Stem, Square Stem Top Plate Top Plate Top Plate no data