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JIC 37 degree flare connections. Match the thread size on both ends.

Check before you order
  • Thread size (dash size)
  • Shape and angle
  • Material and pressure rating

JIC 37 degree flare thread chart

JIC fittings seal metal to metal on a 37 degree flare seat. The thread is UNF (fine) and holds the seat together. Sizes are given as dash numbers: dash number divided by 16 is the tube size in inches.

  • JIC is 37 degrees. JIS fittings use a 30 degree seat and BSP thread: they look alike but do not seal together.
  • Do not mix JIC with NPT (tapered) thread: JIC thread is straight.
  • Many JIC and AN fittings share the same thread, but check the standard before mixing.
DashThread (UNF)Tube OD
-025/16-241/8"Shop
-033/8-243/16"Shop
-047/16-201/4"Shop
-051/2-205/16"Shop
-069/16-183/8"Shop
-083/4-161/2"Shop
-107/8-145/8"Shop
-121-1/16-123/4"Shop
-141-3/16-127/8"Shop
-161-5/16-121"Shop
-201-5/8-121-1/4"Shop
-241-7/8-121-1/2"Shop
-322-1/2-122"Shop

Reference values from SAE J514. Ask us to confirm before you order.

Flare Fittings — 3796 items

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