Heyco Conduit, Tubing & Fittings Heyco-Flex™ III Liquid Tight Conduit Fittings - 90° Sweep, NPT Hubs
Flex III Conduit Fitting

Material: Nylon 6/6


Certified to both Canadian and US Requirements File E121095

Flammability Rating: 94V-2

Material Temperature Index: 125°C (257°F)–Max. temperature on part not to exceed 105°C (221°F)

Ingress Protection Rating: IP 64

  • For use with Heyco-Flex™ III Corrugated tubing in trade sizes 3/8" through 1".
  • Non toxic and UV resistant.
  • Rated for NEMA 4 and 4X applications when used with Heyco-Flex™ III Tubing.
  • Rated for NEMA Type 3R applications.
  • Easy, permanent assembly. The installer simply pushes the tubing over the connector ferrule until the tubing "clicks" into place.
  • Lightweight and lower installed cost.
  • Quick and easy installation.
  • Suitable for use in high vibration or flexing applications (automotive equipment, fiber optics, computer and peripherals, lab equipment, robotics, etc.)
  • Resists salt water, weak acids, gasoline, alcohol, oil, grease and common solvents. This feature is not assessed by UL certification or testing.
  • For use in both wet and dry applications.
  • If using a tapped hole, Teflon® tape is needed on the threads of the connector, for all other applications an O-ring and Locknut are needed to attain liquid tight.
  • Use of an O-ring may be required for a complete liquid-tight system with a non-threaded mounting hole.
  • Locknuts are NOT included, but are available separately.
  • Patented.
Heyco-Flex III Liquid Tight Conduit Fittings
90° Sweep, NPT Hubs
For Flexible, Nonmetallic Liquid Tight Tubing
Fits Tubing Trade Size Part
Description Thread
Part Dimensions
Clearance Hole
Max O.A Length
Max O.A Length
Thread Length
Flange Diameter
Black in. mm. in. mm. in. mm. in. mm. in. mm.
3/8 1955 HF3C 3/8-90R 1/2 NPT   .875 22,2 1.75 44,5 2.74 69,6 .52 13,2 1.23 31,2
1/2 1956 HF3C 1/2-90R
3/4 1957 HF3C 3/4-90R 3/4 NPT 1.109 28,2 2.10 53,3 3.08 78,2 .52 13,2 1.50 38,1
1 1958 HF3C 1-90R 1 NPT 1.375 34,9 2.67 67,8 3.66 93,0 .69 17,5 1.80 45,7