Comparison
JIC 37° vs ORFS
JIC seals metal-to-metal on a 37° cone; ORFS seals an elastomer O-ring between flat faces. ORFS is more leak-resistant under vibration and repeated assembly; JIC is cheaper, more universally stocked, and has no O-ring to lose. Match whatever the circuit already uses.
Side by side
The decision table.
| JIC 37° | ORFS | |
|---|---|---|
| Seal | 37° metal cone | O-ring on flat face |
| Leak resistance | Good, degrades with re-assembly | Excellent, O-ring renewable |
| Vibration tolerance | Moderate | High |
| Reusability | Cone wears with cycles | New O-ring restores seal |
| Availability/cost | Cheapest, everywhere | Higher cost, common on new equipment |
| Typical use | General industrial/mobile | Late-model OEM circuits |
Choose JIC 37° when…
- The machine is already plumbed JIC
- Field serviceability with universally stocked parts matters most
- Cost-sensitive general circuits
Choose ORFS when…
- High-vibration equipment and leak-critical sites
- Late-model OEM machines built with ORFS
- Circuits opened frequently for service
What happens if you mix them
JIC and ORFS threads differ at every dash size and the sealing methods are incompatible — forcing them galls threads and guarantees leaks. Convert with a proper adapter, never with muscle.
JIC vs ORFS Fittings — FAQs
Can I convert JIC circuits to ORFS?
Yes, with adapter fittings or by re-ending hoses — worthwhile on machines with chronic vibration leaks.
Which is 'better'?
ORFS seals better under vibration; JIC is cheaper and simpler. The best fitting is the one the rest of the machine already uses.
Still deciding?
Bring both fittings to the counter — or call (817) 589-7101 and read us the layline. We settle these in minutes, with the gauges out.