Home > Steel Adapters > Boss (O-Ring) Thread
O-ring Boss thread adapters use a straight thread and an o-ring to create a seal between female and male fittings.  O-ring Boss fittings are an excellent choice for medium to high pressure applications.  Our O-ring Boss thread fittings and adapters are equivalent to fittings from Parker Hydraulics, Eaton Aeroquip, Weatherhead, Goodyear, and Gate Hydraulics.
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6400L 6400L

Male JIC x Male O-Ring Boss Straight

6401 6401

Male O-Ring Boss x Male Pipe Straight

6402 6402

Male O-Ring Boss x Female JIC Swivel Straight

6404 6404

Female O-Ring Boss x Male Pipe Straight

6405 6405

Male O-Ring Boss-Female Pipe Straight

6407 6407

Adjustable Male O-Ring Boss x Male O-Ring Boss

6408 6408

Male O-Ring Boss External Hex Plug

6409 6409

Hex Socket Male O-Ring Boss Plug

6410 6410

Male O-Ring Boss x Female O-Ring Boss Straight Reducer

6425 6425

Female O-Ring Boss x Female O-Ring Boss Straight

6501 6501

Male Pipe x Female JIC Swivel 90°

6801L 6801L

Male JIC x Male O-Ring Boss 90° Long

6801LL 6801LL

Male JIC x Male O-Ring Boss 90° Extra Long

6802 6802

Male JIC x Male O-Ring Boss 45°

6803 6803

Male JIC x Male JIC x Male O-Ring Boss Branch Tee

6804 6804

Male JIC x Male O-Ring Boss x Male JIC Run Tee

6805 6805

Male O-Ring Boss x Female Pipe 90°

6805L 6805L

Male O-Ring Boss x Female Pipe 90° Long

6806 6806

Male O-Ring Boss x Male Pipe 90°

6807 6807

Male O-Ring Boss x Male O-Ring Boss 90°

6809 6809

Male O-Ring Boss x Female JIC Swivel 90°

6815 6815

Male O-Ring Boss x Female O-Ring Boss 90°

6900 6900

Male O-Ring Boss x Female NPSM

6901 6901

Male O-Ring Boss x Female NPSM 90°

6902 6902

Male O-Ring Boss x Female NPSM 45° Long