Stay Connected with Heyco Liquid Tight Flexible Conduit, Tubing & Fittings
Heyco-Flex III Liquid Tight Tubing
Flexible, Nonmetallic Liquid Tight Electrical Tubing
 Corrugated tubing for trade sizes 
TRADE PART NO. DESCRIPTION PART DIMENSIONS STANDARD
3/8 through 1.
SIZE AB COIL LENGTH*
Black Outside Inside
 Flame retardant, wont burn.
Diameter Diameter
 Nontoxic and UV resistant.
in. mm. in. mm. ft/coil
 Rated for NEMA 4 and 4X 
3/8 8478 HF3 3/8 FR .710 18,0 .514 13,1 100
applications when used with 
1/2 8479 HF3 1/2 FR .850 21,6 .651 16,5 100
Heyco-Flex III Liquid Tight Fittings.
3/4 8480 HF3 3/4 FR 1.116 28,3 .865 22,0 100
1 8481 HF3 1 FR 1.350 34,3 1.103 28,0 100  Rated for NEMA Type 3R applications.
*Consult Heyco for cut to length and slit tubing availability.  Maximum flexibility, can be used in 
extremely tight quarters. Bend radius 
of Heyco-Flex III is equal to its 
outside diameter.
 No threading of the tubing required to 
A B install. This eliminates the possibility 
of cutting the tubing and creating 
leak paths.
 Easy, permanent assembly between 
the tubing and fittings: push the 
tubing over the fitting ferrule until the 
tubing clicks into place.
 Lightweight and lower installed cost.
 Quick and easy installation.
 For use with Heyco-Flex III 
Fittings. See pages 2-17 & 2-18.
 Resists corrosion, oil, and water.
 For use in both wet and 
dry applications.
Heyco Female Threaded Couplings
 Suitable for use in high vibration or 
flexing applications (automotive 
For Heyco HF3C and other NPT Hub Components
equipment, fiber optics, computer 
 Both ends feature female NPT threads and peripherals, lab equipment, 
TRADE SIZE PART NO. DESCRIPTION
Gray
for joining various male NPT hub parts. robotics, etc.).
1/2 8665 FTC 1/2
 Facilitate the connection between  Voltage Rating: 300V.
3/4 8666 FTC 3/4
Heyco-Flex III Fittings (HF3C  pages 
 Mounting brackets are available, 
1 8667 FTC 1
2-17 & 2-18), Conduit (HF3  page 
see page 2-13.
1-1/4 8668 FTC 1-1/4
2-16), and the various Heyco Liquid 
 Order Part No. 8340, HF-28 Cutting 
1-1/2 8669 FTC 1-1/2
Tight Cordgrips (Section 3) typically 
Tool, for cutting Heyco-Flex Tubing 
2 8670 FTC 2
used in solar installations.
cleanly and evenly. See page 2-2.
Material: Schedule 80 PVC
 For additional nylon conduit sizes, 
see pages 2-19 and 2-20.
Material Halogen Free Nylon 6
Quick
Certifications Certified to both Canadian and U.S. Requirements under File E121095
Flammability Rating 94V-0
Temperature Rating -.4F (-18C) to 221F (105C)
Specs
1-800-526-4182  732-286-1800 (NJ)  FAX: 732-244-8843  www.heyco.com 2-16