UL Type B Flexible, Nonmetallic Liquid Tight Conduit Heyco-Flex™ I Liquid Tight Fittings
Liquid Tight Tubing, Electrical Conduits & Nylon Conduit Fittings |
UL Type B Flexible, Nonmetallic Liquid Tight Conduit
Heyco-Flex™ I Liquid Tight Fittings


- 3/8" thru 2" trade nylon fastener sizes.
- Use with Nylon Heyco fasteners, Nylon -Flex fastener - Snap-in, Straight or Sweep.
- May also be used with Heyco's Steel and Die Cast Nylon fasteners for Liquid Tight Conduit.
- Nylon flex fastener resists corrosion, abrasion, oil, water, acid, metal shavings, and rough environments.
- Nylon fastener resists abuse, pull, and crushing.
- Nylon fastener temperature ratings: From -18°C (0°F) to 80°C (176°F) DRY. 70°C (160°F) OIL resistance. Up to 60°C (140°F) WET locations.
- Passes submersion test of 70 PSI.
- Nylon flex fastener mounting brackets are available.
- Nylon fasteners have a smooth inside for easier wire pulling; no hazardous sharp edges or burrs; will not damage conductors.
- Nylon fasteners are light weight and have lower installed cost.
- Quick installation; nylon fastener cuts with utility knife or PVC cutter.
- Integral rigid and flexible PVC construction.
- Nylon flex fasteners are suitable for indoor/outdoor use:
HVAC Equipment
Machine Tools
Marine Equipment
Motors and Controls
Printing Equipment
Pumps
Refrigeration Equipment - Order part No. 8340, VF-28 Cutting Tool, for cutting HEYCO - Flex I Conduit and Heyco -Flex II, III & IV tubing cleanly and evenly.
- Nylon flex fasteners are approved for direct burial
- Order Part No. 8340, VF-28 Cutting Tool, for cutting HEYCO-Flex I Conduit and Heyco-Flex II, III & IV tubing cleanly and evenly.
- Approved for direct burial

A | A | B | B | |||
Trade | UL/CSA | Outside | Diameter | Inside | Diameter | |
Size | Part No. | Description | in | mm | in | mm |
3/8 | 8430 | HF1-3/8 | .700 | 17.8 | .494 | 12.5 |
1/2 | 8431 | HF1-1/2 | .830 | 21.1 | .632 | 16.1 |
3/4 | 8432 | HF1 3/4 | 1.040 | 26.4 | .830 | 21.1 |
1 | 8433 | HF1 1 | 1.303 | 33.1 | 1.054 | 26.8 |
1-1/4 | 8434 | HF1 1-1/4 | 1.645 | 41.8 | 1.395 | 35.4 |
1-1/2 | 8435 | HF1 1-1/2 | 1.882 | 47.8 | 1.588 | 40.3 |
2 | 8436 | HF1 2 | 2.358 | 59.9 | 2.032 | 51.6 |

Use Nylon Heyco-Flex Mounting Brackets to securely fasten conduit into place.