For a threaded 5/8-inch fastener, the uxcell internal-tooth washers are the closest match: choose 304 stainless steel for a stainless material or zinc-plated carbon steel as an alternative. For an unthreaded 5/8-inch dolly axle, choose a push-on retainer instead; it is a different washer style designed to grip an axle rod. The options below compare material, quantity, and intended use so you can match the part to the fastener or axle.
| Product | Style | Best For |
|---|---|---|
| uxcell 304 Stainless Steel | Internal-tooth star washer | Threaded fasteners and stainless material preference |
| uxcell Zinc-Plated Carbon Steel | Internal-tooth star washer | Threaded fasteners and carbon steel preference |
| Blulu 8-Pack | Push-on axle retainer | Replacing a dolly wheel retainer |
| AR-PRO 8-Pack | Pushnut axle retainer | Low-torque dolly, hand-cart, or lawn-wagon axles |
| Blulu 10-Pack | Push-on axle retainer | Axle maintenance where a larger pack is useful |
uxcell 304 Stainless Steel Internal Tooth Washer
This 10-piece set is best for buyers who need an internal-tooth star washer for a threaded 5/8-inch fastener and prefer 304 stainless steel. The listed dimensions are a 16 mm inner diameter, 27 mm outer diameter, and 1.2 mm thickness. Its internal teeth are intended to increase friction and resistance to rotation between the fastener and the base.
The 304 stainless steel construction is described as corrosion-resistant and resistant to deformation. Choose this option when material choice is important and its dimensions suit the assembly. A limitation is that the product listing gives metric dimensions alongside the nominal 5/8-inch size, so confirm the required fit rather than relying on the nominal label alone.
uxcell Zinc-Plated Carbon Steel Star Washers
This 10-piece set is best for a buyer seeking a 5/8-inch internal-tooth washer in zinc-plated carbon steel. The listed inner diameter is 16 mm, outer diameter is 26.8 mm, and thickness is 1.2 mm. Like the stainless option, its star-shaped internal teeth are intended to provide friction and resist rotation when installed between a fastener head and the base material.
Choose this version if zinc-plated carbon steel matches the material requirements of the job. The product listing describes the coating as corrosion-resistant, but it does not provide a specific exposure rating. Avoid treating this as interchangeable with a push-on axle retainer: this is an internal-tooth washer for a fastener assembly, not a retainer specified for an unthreaded dolly axle.
Blulu 8-Pack Dolly Axle Push Nut Washers
This eight-piece set is best for replacing retainers on a dolly or similar wheel setup with a non-threaded 5/8-inch hub axle rod. These are push-on washers, not internal-tooth star washers for threaded fasteners. Blulu lists 65Mn spring steel construction, a black phosphate oil coating, and an outer diameter of about 1 inch. The listing states an approximate 0.002-inch diameter tolerance.
Choose this product when the task is securing a wheel on a compatible unthreaded axle. The spring action and teeth are intended to resist movement after installation. A key limitation is that push-on retainers are not described as removable, reusable threaded washers; check the axle type and dimensions before ordering.
AR-PRO Spring Steel Push-On Pushnuts
AR-PRO’s eight-pack is best for low-torque outdoor equipment applications such as dollies, hand carts, and lawn wagons, as described in the listing. The pushnuts fit unthreaded 5/8-inch dolly axle rods and have an outer diameter of 1 inch. Their teeth slide onto the stud with a ratcheting action intended to allow movement in one direction while resisting movement in the other.
Choose this option when you need a push-on alternative to a pin and washer for a compatible axle. The listed thickness is 0.02 inch, and the finish is oiled phosphate. The product is specifically described for low-torque applications, so avoid choosing it for a threaded joint or assuming it suits applications outside the stated use.
Blulu 10-Pack Push-On Dolly Wheel Retainers
This 10-piece Blulu set is best for buyers maintaining dolly wheels on unthreaded 5/8-inch hub axle rods who want the larger listed quantity. It uses 65Mn spring steel with a black phosphate oil coating. The stated outer diameter is about 1 inch, with an approximate 0.002-inch diameter tolerance. The listed spring action is intended to create friction and resist rotation on the axle.
Compared with the eight-piece Blulu set, the main stated difference is the number of retainers supplied; the core material and axle use are similar. Choose this if the axle dimensions match and extra pieces are useful for maintenance. It is not the right style for a conventional threaded fastener requiring an internal-tooth lock washer.
Buying Guide: How to Choose a 5/8-Inch Lock Washer
Is the part going on a threaded fastener or an axle?
Start by identifying the joint. An internal-tooth star washer sits in a threaded fastener assembly and uses its teeth to add friction. A push-on pushnut is designed to grip an unthreaded axle rod, such as a dolly wheel axle. These styles are not interchangeable just because both listings mention 5/8 inches.
Which material and finish fit the job?
The uxcell options are listed as 304 stainless steel and zinc-plated carbon steel. Compare the material to the assembly’s requirements and exposure conditions. The push-on options use 65Mn spring steel and a black phosphate oil finish, with the AR-PRO product described as having an oiled phosphate finish. The listings do not specify a precise corrosion-performance rating.
Which dimensions should you verify?
For the star washers, check inner diameter, outer diameter, and thickness against the fastener and available space. For pushnuts, confirm that the axle is unthreaded and measures 5/8 inch, then compare the listed outer diameter. Nominal size alone does not guarantee a suitable fit.
How many pieces should you buy?
The internal-tooth options come in 10-piece sets. The push-on retainers come in packs of eight or ten. Select the quantity based on the number of wheels or fasteners being serviced, while keeping spare parts needs in mind.
Frequently Asked Questions
What does an internal-tooth lock washer do?
Its teeth press against surfaces in a fastener assembly to increase friction and help resist rotation. The listed uxcell washers are intended for use with a fastener and base material.
Is a pushnut the same as an internal-tooth washer?
No. A pushnut is a push-on retainer for an unthreaded axle rod. An internal-tooth washer is a star washer for a fastener assembly.
Will a 5/8-inch washer fit every 5/8-inch part?
No. Check the actual part type and listed dimensions. The two uxcell washers list a 16 mm inner diameter, while the pushnuts are specified for unthreaded 5/8-inch axle rods.
Which option is intended for a dolly wheel?
The Blulu and AR-PRO push-on products are listed for dolly axle rods. Verify that the axle is unthreaded and compatible with the stated 5/8-inch size.