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Steel Adapter, 13/16-16 Male O-Ring Face Seal Cap

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Description & Features

Rated for a minimum working temperature of -40°F, this cap is built for demanding hydraulic environments where secure port sealing is essential. The Steel Adapter, 13/16-16 Male O-Ring Face Seal Cap is part of the Danfoss Power Solutions (Aeroquip) FF9863 Series and is designed to seal O-Ring Face Seal (ORS) ports with a 13/16-16 thread. Manufactured from steel, it provides reliable closure on unused or inactive ORS ports, helping to maintain system integrity during assembly, storage, or service.

With a tube O.D. of 0.5 inches and a female end-type ORS configuration, this cap assembly is compatible with standard ORS port fittings commonly found in mobile and industrial hydraulic circuits. No thread sealant is required due to the face seal design. The catalog reference for this part is C1CV78.

SKU: FF9863-08S

Supplier Part Number (MPN): FF9863-08S

Alternate Part Numbers: C1CV78, MI-00306486, MINO-00015F55562

Specifications

A
0.90
Alternate Part Numbers
Alternate Part Number C1CV78, Alternate Part Number MI-00306486, Alternate Part Number MINO-00015F55562
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Gender 1
13553
End Size 1
0.81
End Size 2
0.50
End Type 1
ORS
Minimum Working Temperature
-40
Supplier Part Number
FF9863-08S
Thread 2
13/16-16
Thread Sealant
No
Tube O.D.
0.50
Tube O.D.
0.5
Product Weight
0.12 lbs

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Product Questions & Answers (5)

Question by: Gary M on Aug 4, 2025, 8:25 AM
got a half inch tube line that needs capping off on an ORS port, this the right size for that?
Answer by: Customer Support on Aug 6, 2025, 6:35 AM
For a 1/2 inch ORS tube line, the thread size you need is 13/16-16, and that is exactly what this cap is threaded to. It seats against the flat face of the port using an o-ring seal, so you get a leak-free closure without thread sealant. Straight swap, no tape, no compound needed.
Question by: Sherry S on Sep 21, 2025, 9:06 AM
trying to cap off a 13/16-16 o-ring face seal port, is this the right one?
Answer by: Customer Support on Sep 23, 2025, 6:21 AM
For a 13/16-16 thread on an O-Ring Face Seal connection, this part matches that thread spec and is an ORS cap assembly in the Danfoss FF9863 series.
Question by: Kent P on Mar 25, 2025, 11:20 AM
Will this cap fit a standard O-ring face seal port?
Answer by: Customer Support on Mar 27, 2025, 6:05 AM
This Eaton Aeroquip adapter cap is specifically made to fit a 13/16-16 male O-ring face seal. It's designed to protect those ports from contamination and damage when they aren't in use.
Question by: Pete S on Aug 19, 2025, 8:39 PM
got a port that needs capping off on a hydraulic system, this a 13/16-16 ORB or is it the O-ring face seal thread?
Answer by: Customer Support on Aug 21, 2025, 5:51 PM
The thread on this cap is 13/16-16 O-ring face seal, which is the ORFS standard. That's a flat-face port connection with the seal made by an O-ring sitting against a flat machined surface, not an O-ring seated in an angled boss like ORB fittings use. If your port has a flat face and uses that thread size, this cap will match up correctly.
Question by: Sheila K on May 16, 2025, 6:13 AM
got a port with 13/16-16 ORFS threads. is this the right cap to close it off?
Answer by: Customer Support on May 17, 2025, 3:27 PM
For a 13/16-16 male O-Ring Face Seal (ORFS) cap assembly, FF9863-08S is the matching style. It’s a straight adapter ORS cap meant to seal off that ORFS male thread size.