If you need a true 5/8-inch inside-diameter rubber hose, none of the products below is that size. The listings are for 8mm ID hose, which is about 5/16 inch, or 5mm ID tubing, which is about 3/16 inch. The options below may suit smaller connections or other uses, but measure your fitting before ordering. The fuel line is intended for automotive fuel use; the silicone choices are for air, water, or other uses described in their listings.
| Product | Listed ID | Best For |
|---|---|---|
| Quickun silicone tubing | 5mm | Food and beverage applications |
| Clear silicone tube | 5mm | Short, transparent tubing runs |
| Ucreative thick-wall silicone hose | 8mm | Air or water use needing a thicker wall |
| Nylon-braided fuel line | 8mm | Automotive fuel-line applications |
| uxcell black silicone tubing | 8mm | Pump and fluid-transfer uses |
Quickun 5mm ID Silicone Tubing
Best for: Buyers who need narrow, flexible tubing for home brewing, beverage lines, aquaponics, air, or water. This listing specifies a 5mm ID and 8mm OD, so it is not a 5/8-inch ID hose.
The silicone is described as food grade, BPA-free, and non-toxic, with a 50A durometer. Its smooth inner surface is intended to support flow and cleaning. The listed length is 9.84 feet, making it a longer option than the one-meter tubes in this selection.
Limitation: Its 5mm bore is much smaller than 5/8 inch. Choose it only when the required inner diameter is 5mm and the stated material and application suit your setup.
Clear 5mm Silicone Rubber Tube
Best for: Small-appliance or general air-and-water setups that need a clear tube in a short length. The listing gives a 5mm ID, 8mm OD, 1.5mm wall thickness, and a length of 1 meter.
The product description lists an operating temperature range of -76°F to +428°F and 65-degree hardness. Clear tubing can help with visual inspection of the line, while the stated size helps buyers compare it with fittings and existing hose.
Limitation: At 5mm ID, this is not a substitute for 5/8-inch hose. The short one-meter length may also be insufficient for longer runs.
Ucreative 8mm Thick-Wall Silicone Hose
Best for: Buyers who need 8mm ID silicone hose for water or air and want a thicker wall than the 5mm-ID options. The listing specifies 8mm ID, 14mm OD, a 3mm wall, and a five-foot length.
The product description lists a temperature range of -40°F to 428°F, a 43 PSI working pressure, and burst-pressure figures of 100 PSI at high temperature and 130 PSI at room temperature. It also says the hose is made from pure silicone raw materials.
Limitation: The listing says water and air use only, so do not select it as a fuel hose. Its 8mm ID is approximately 5/16 inch, not 5/8 inch.
Nylon-Braided 8mm Fuel Line
Best for: Buyers seeking a listed automotive fuel hose with an 8mm ID. It has a five-foot length, 14mm OD, and a three-layer NBR-braided nylon-NBR construction, according to the product details.
The listing specifies a 300 PSI working pressure and 1,160 PSI burst pressure. Its NBR material is described as oil-resistant and heat-resistant. The reinforced construction makes this a better match than general-purpose silicone tubing when the application specifically calls for fuel line.
Limitation: This hose is 8mm ID, not 5/8 inch. Confirm that its material and dimensions meet the vehicle or equipment requirements before purchase.
uxcell 8mm Black Silicone Tubing
Best for: Pump or fluid-transfer setups requiring black silicone tubing with an 8mm ID. The listing gives an 8mm ID, 12mm OD, 1-meter length, and 65-degree hardness.
The product description says the tubing can withstand repeated use and can be used for visual inspection of fluids. Its stated operating-temperature range is -76°F to +428°F. Choose this if the 8mm bore and 12mm outside diameter fit the connection and the application is appropriate for silicone tubing.
Limitation: It is not a true 5/8-inch ID hose, and the one-meter length may not work for a longer installation.
Buying Guide: How to Choose the Right Hose Size
Is 8mm ID the same as 5/8 inch?
No. An 8mm inside diameter is approximately 5/16 inch. A 5/8-inch ID is approximately 15.9mm, nearly twice as wide. Check the required measurement before buying; the outside diameter does not tell you the hose’s inside diameter.
Which measurement should you compare?
Start with the fitting’s required inside diameter, then compare the hose’s outside diameter and wall thickness with the available space and connection method. The listed products span 5mm ID by 8mm OD, 8mm ID by 12mm OD, and 8mm ID by 14mm OD. Similar ID does not mean the outside dimensions match.
Should you choose silicone or fuel hose?
Match the material to the intended fluid and operating conditions. The listings describe silicone options for air, water, food, beverages, or pump transfer, while the braided NBR hose is specifically presented as an automotive fuel line. Do not assume a general-purpose tube is suitable for fuel.
What else should you verify before ordering?
Confirm the exact inside diameter, outside diameter, length, temperature range, and pressure information stated for the product. For pressure or vehicle applications, follow the equipment maker’s hose requirements. If you specifically need 5/8-inch ID, look for a listing that clearly states an inside diameter near 15.9mm rather than choosing an 8mm product.
Frequently Asked Questions
Does any product here have a 5/8-inch inside diameter?
No. The listed inside diameters are 5mm or 8mm. Neither is equivalent to 5/8 inch.
What does 5mm ID x 8mm OD mean?
It means the tube’s inside diameter is 5mm and its outside diameter is 8mm. The difference between those measurements accounts for both sides of the tube wall.
Which option is listed for fuel?
The nylon-braided NBR rubber hose is described as an automotive fuel line. The Ucreative silicone listing specifies water and air use only.
Which listed tube has the largest inside diameter?
The Ucreative hose, nylon-braided fuel line, and uxcell tubing each list an 8mm inside diameter. That is the largest ID among these products, but it remains smaller than 5/8 inch.