37° Flared JIC Fittings — 316 Stainless Steel

About JIC Reducing Adapters and Sleeves

A JIC reducing adapter lets a 37° flare line change size without breaking into a pipe-thread joint. One end carries a 37° flare seat and the other takes a different JIC nut size, so a larger header can step down to a smaller instrument or actuator line while keeping flare-to-flare sealing on both sides. This avoids stacking a separate connector and bushing, which adds length and an extra leak path.

Sleeves are the supporting part of a JIC joint. The sleeve sits between the nut and the flared tube end, spreading the clamping load evenly across the back of the flare and supporting the tube just behind it. That support matters on lines exposed to vibration or pressure cycling, where an unsupported flare root is the usual point of fatigue.

Every part in this range is SS316, suited to offshore, marine and chemical service where plated carbon steel hydraulic adapters would corrode. The category covers sizes from 1/4" to 2", and the wider JIC range is offered in NPT, BSPT, BSPP, SAE/MS and metric threads where a threaded end is required.

• Confirm both flare sizes, larger end and smaller end, before ordering a reducing adapter.
• Use a sleeve with each flared tube end so the nut bears evenly on the flare.
• Check the tube wall is suitable for 37° flaring at the size you are reducing to.
• Filter the table by fitting type and size, then request a quote from Valvenok's UK team.