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Steel Adapter, 7/8-14 Male SAE O-Ring Boss (Straight Thread O-Ring) To 9/16-18 Female SAE O-Ring Boss (Straight Thread O-Ring), Straight

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Description & Features

This steel adapter features a 7/8-14 Male SAE O-Ring Boss (Straight Thread O-Ring) to 9/16-18 Female SAE O-Ring Boss (Straight Thread O-Ring) connection in a straight configuration.

This adapter is suitable for applications in marine/military, chemical processing, pulp and paper industries, food and beverage processing, and off-shore drilling. It is part of the Danfoss / Eaton FF1010 Series of reducer adapters and is designed for a minimum working temperature of -40 degrees. It is also identified by catalog number C1CU57.

The 7/8-14 thread has a tube I.D. of 0.51 and mates to seal part number 22617-10.

SKU: FF1010-1006S

Supplier Part Number (MPN): FF1010-1006S

Alternate Part Numbers: C1CU57, MI-00298799, MINO-00015F47231

Specifications

A
0.81
Alternate Part Numbers
Alternate Part Number C1CU57, Alternate Part Number MI-00298799, Alternate Part Number MINO-00015F47231
Application
Marine/Military, Chemical Processing, Pulp and Paper Industries, Food and Beverage Processing, Off-Shore Drilling
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Gender 1
13554
End Gender 2
13555
End Size 1
0.88
End Size 2
0.56
End Type 1
SAE ORB
End Type 2
SAE ORB
Minimum Working Temperature
-40
Seal Part if Included
22617-10
Supplier Part Number
FF1010-1006S
Thread 1
7/8-14
Thread 2
9/16-18
Thread Sealant
No
Tube I.D. 1
0.51
Product Weight
0.16 lbs

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Product Questions & Answers (5)

Question by: Billy E on Apr 21, 2025, 7:55 AM
got a 7/8-14 male ORB port on a hydraulic block and need to step it down to a 9/16-18 female connection. this the right part for that?
Answer by: Customer Support on Apr 22, 2025, 2:08 PM
That's what this adapter does. It takes a 7/8-14 male SAE O-Ring Boss thread on one end and gives you a 9/16-18 female SAE O-Ring Boss connection on the other, all in a straight configuration. Both ends use O-ring sealing, so you get a clean, leak-resistant connection at the step-down without needing thread sealant. The included seal part number is 22617-10, so you should have what you need right out of the box to make that fitting up.
Question by: Carl E on Dec 7, 2025, 11:33 AM
Will this adapter hold up in a saltwater environment on my boat?
Answer by: Customer Support on Dec 9, 2025, 6:28 AM
Application notes mention marine uses, so it should be suitable for saltwater environments.
Question by: Brent B on Oct 31, 2025, 7:17 AM
got a port that’s 7/8-14 ORB and i need to step it down, is FF1010-1006S the right reducer?
Answer by: Customer Support on Nov 1, 2025, 11:35 AM
You’re on the right track. FF1010-1006S is a straight reducer adapter that goes from 7/8-14 male SAE O-Ring Boss (straight thread O-ring) to 9/16-18 female SAE O-Ring Boss (straight thread O-ring).
Question by: Kirk L on Jun 28, 2025, 9:37 PM
Will this adapter work to connect a 7/8-14 male O-ring boss to a 9/16-18 female O-ring boss? Just wanna make sure before I order.
Answer by: Customer Support on Jun 30, 2025, 10:53 AM
Yes, this steel adapter is specifically designed to reduce from a 7/8-14 male SAE O-ring boss to a 9/16-18 female SAE O-ring boss, using a straight configuration.
Question by: Merle S on May 6, 2025, 4:08 PM
what industries is this adapter actually built for? like i got a few different setups and wanna make sure this fits the kind of work im doing before i order it
Answer by: Customer Support on May 8, 2025, 6:30 AM
Rated applications for this adapter include marine and military use, chemical processing, pulp and paper use, food and beverage processing, and offshore drilling. That covers a pretty wide range of demanding environments, so if your work falls into any of those categories you're in good shape. It's part of the Eaton Aeroquip FF1010 series, which is a reducer adapter line built for SAE O-Ring Boss connections.