• Fittings are designed and manufactured in compliance with SAE J514
  • The hardened threads with smooth surface finish avoid galling and help to extend the fitting service life
  • Radius junction design for elbows provide smooth flow path
  • Stainless steel nut threads are silver-plated to minimise the friction with the body threads
  • Every fitting is marked with size, material and heat number
  • Fittings are easy to disconnect and retighten
  • All male threads are protected by plastic caps

Technical Data

  • Size range from 1/8″ to 2″ and 3 mm to 50 mm
  • Thread Specification:
Thread TypeReference Specification
NPTASME B1.20.1, SAE AS71051
Unified (SAE)ASME B1.1, SAE J475

Working Pressure

Working pressures given are fittings of stainless steel only. Contact our sales team for working pressures of other materials. Four times safety factor applied for above working pressure,

Flaring Operation

Tube flaring is carried out in two different ways, single wall flare on thick wall tubes and double wall flare on thin wall tubes to reinforce same.

Installation Instructions

  1. Cut the tube to the proper length.
  2. Insert the tube into the nut and sleeve.
  3. Form the flare to 37° dimension according to SAE J533.
  4. Finger-tighten the nut
  5. Tighten the nut 1/4 turn with wrench while holding steady the body of the fitting


  • Do not loosen or tighten fittings when system is pressurised.
  • Please use proper thread sealants on tapered pipe threads.

For any inquires or extra information on FITOK’s 37° Flared Tube Fittings or any other products we have to offer please contact our sales team: sales@nvfcl.com or call 01942601209