8mm (5/16 in.) OD x 500 ft. Black Polyethylene Tubing
8mm (5/16 in.) OD x 500 ft. Black Polyethylene Tubing
Sizes in This Series
Polyethylene tubing, 500 ft. rolls. Jump to another size or add it straight to your cart:
| Size | Part # | Color | Price | Cart |
| 1/4 in. OD | 73203G5 | Green | $89.99 | Add to cart |
| 8 mm (5/16 in.) OD (this page) | 73205B5 | Black | $129.99 | — |
| 1/2 in. OD | 73207R5 | Red | $169.99 | Add to cart |
Overview
This black coil of 8 mm (5/16 in.) OD linear low-density polyethylene (LLDPE) tubing ships as a 500 ft. roll, supplied as Midland part 73205B5. With a 6 mm inside diameter and 1 mm wall, it pairs with barb, push-to-connect, and compression fittings for chemical feed, pneumatic, and fluid-transfer lines. Sold as a single continuous roll so you can cut runs to length in the field.
Technical Specifications
| Manufacturer Part # | 73205B5 |
| Outside Diameter (OD) | 8 mm (5/16 in.) |
| Inside Diameter (ID) | 6 mm |
| Wall Thickness | 1 mm |
| Roll Length | 500 ft. |
| Color | Black |
| Minimum Bend Radius | 38.1 mm |
| Working Pressure | 150 psi |
| Temperature Rating | -50°F to 140°F |
| Hardness | Shore A 98 / Shore D 45 |
| Compatible Fittings | Barb, push-to-connect, compression |
| Sold As | One continuous roll |
Materials of Construction
| Tube Material | Linear low-density polyethylene (LLDPE) |
| Composition | 100% non-toxic; NSF 61 and FDA compliant |
| Resistance | Chemical, stress-crack, and UV resistant |
Typical Applications
This 8 mm (5/16 in.) OD polyethylene tubing is used for chemical metering and dosing feed lines, pneumatic and instrument air runs, drain and lab lines, potable water and beverage transfer, and general low-pressure fluid handling. Its NSF 61 and FDA-compliant LLDPE construction and chemical resistance make it a common choice in water treatment, cooling tower, and process plumbing where an inexpensive, flexible, easy-to-route line is needed.
Cross-Reference and Interchange
This 8 mm (5/16 in.) OD polyethylene tubing cross-references to these competitor and industry part numbers: PE08M/516CBK, UP-56-BK-500. Replacing one of these? Match nominal OD, wall, and pressure rating, or send us your part number and we will confirm the interchange.
Sizing and Installation Resources
- Tubing Material Selection Guide
- Tubing OD vs. ID Sizing Reference
- Poly Tubing Chemical Compatibility Chart
- Chemical Compatibility Chart for Fluid Handling
Frequently Asked Questions
Is 8 mm (5/16 in.) OD the tube's outside or inside diameter?
8 mm (5/16 in.) is the outside diameter (OD). The inside diameter is 6 mm. Match fittings to OD for push-to-connect and compression, and to ID for barb fittings.
What fittings work with this tubing?
Barb-type, push-to-connect, and compression-style fittings rated for polyethylene tube. Confirm the fitting is sized for 8 mm (5/16 in.) OD tube.
How is it sold?
As one continuous 500 ft. roll. Cut runs to length with a tube cutter for a clean, square end.
What is the pressure and temperature limit?
150 psi working pressure at ambient temperature, rated from -50°F to 140°F. Derate pressure as temperature rises.
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.