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Steel Adapter, 9/16-18 Male O-Ring Face Seal Cap

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Description & Features

This steel adapter features a 9/16-18 male O-ring face seal cap. The Eaton Aeroquip steel adapter is suitable for various hydraulic applications requiring a secure, leak-resistant connection.

With an A dimension of 0.66 inches, this adapter ensures compatibility and proper fit within specified systems.

SKU: FF9863-04S

Supplier Part Number (MPN): FF9863-04S

Alternate Part Numbers: C1CV76, MI-00306484, MINO-00015F55560

Specifications

A
0.66
Alternate Part Numbers
Alternate Part Number C1CV76, Alternate Part Number MI-00306484, Alternate Part Number MINO-00015F55560, Alternate Part Number MINO-00925X13384
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Gender 1
13553
End Size 1
0.56
End Size 2
0.25
End Type 1
ORS
Minimum Working Temperature
-40
Supplier Part Number
FF9863-04S
Thread 2
9/16-18
Thread Sealant
No
Tube O.D.
0.25
Tube O.D.
0.25
Product Weight
0.05 lbs

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Product Questions & Answers (5)

Question by: Kurt T on Nov 27, 2025, 1:14 PM
Will this cap fit a standard ORS fitting?
Answer by: Customer Support on Nov 28, 2025, 4:06 PM
It's designed to fit O-Ring Face Seal (ORS) connections with a 9/16-18 male thread.
Question by: Roger H on Sep 17, 2025, 8:46 AM
trying to match up threads here, is this cap assembly the 9/16-18 one for an O-ring face seal?
Answer by: Customer Support on Sep 18, 2025, 7:33 PM
The Thread 2 on this adapter is 9/16-18 and the End Type is ORS, so it’s meant for an O-ring face seal style connection on that threaded end.
Question by: Shawn B on Jul 5, 2025, 6:02 PM
What size is this cap? Just want to make sure it fits my setup.
Answer by: Customer Support on Jul 7, 2025, 8:36 AM
This cap fits a 9/16-18 male O-ring face seal.
Question by: Bobby P on Jan 13, 2026, 8:05 PM
what exactly is this cap used for on a hydraulic line? trying to figure out if it'll work for blocking off an unused ORS port on my manifold
Answer by: Customer Support on Jan 15, 2026, 6:46 AM
Capping off an open O-ring face seal port is exactly what this piece is built for. The 9/16-18 thread fits a -04 size ORS port, and the male ORS end seals against the port face with an O-ring, so you get a leak-free block-off without needing a plug on the other component. It's a common solution for unused ports on manifolds, valves, and blocks where you need a clean, pressure-rated closure.
Question by: Tony H on Feb 1, 2026, 9:38 AM
got a 9/16-18 ORFS port i need to cap off, is FF9863-04S the right piece?
Answer by: Customer Support on Feb 2, 2026, 8:29 PM
For a 9/16-18 male O-Ring Face Seal (ORFS) cap, FF9863-04S matches that thread and style. It is a straight ORS cap assembly in the Danfoss / Eaton FF9863 series.