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Steel Adapter, 9/16-18 Male SAE O-Ring Face Seal To 3/8-18 Male NPT, Straight

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Description & Features

This steel adapter is a straight adapter from the Danfoss / Eaton FF2031T series. It adapts from 9/16-18 male SAE O-ring face seal to 3/8-18 male NPT connections. Suitable for applications such as marine/military, chemical processing, pulp and paper industries, food and beverage processing, and off-shore drilling. Minimum working temperature: -40 degrees.

Thread 1 is 9/16-18 and thread 2 is 3/8-18. Tube I.D. 1: 0.17. Tube I.D. 2: 0.41. Tube O.D.: 0.25. Seal part, if included: FF9446-11.

SKU: FF2031T0406S

Supplier Part Number (MPN): FF2031T0406S

Alternate Part Numbers: C1JA70, MI-02056508, MINO-00015J90454

Specifications

A
1.24
Alternate Part Numbers
Alternate Part Number C1JA70, Alternate Part Number MI-02056508, Alternate Part Number MINO-00015J90454, Alternate Part Number MINO-00925X13075
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
13556
End Size 1
0.56
End Size 2
0.38
End Type 1
ORS
End Type 2
NPTF
Minimum Working Temperature
-40
Seal Part if Included
FF9446-11
Supplier Part Number
FF2031T0406S
Thread 1
9/16-18
Thread 2
3/8-18
Thread Sealant
No
Tube I.D. 1
0.17
Tube I.D. 2
0.41
Tube O.D.
0.25
Tube O.D.
0.25
Product Weight
0.06 lbs

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Product Questions & Answers (2)

Question by: Wayne S on Oct 11, 2025, 12:12 PM
trying to hook up a 9/16-18 ORFS line to a 3/8-18 NPT port, is that what this adapter does
Answer by: Customer Support on Oct 12, 2025, 8:23 PM
Function-wise, it bridges those two connection types in a straight body. One end is 9/16-18 male SAE O-ring face seal, and the other end is 3/8-18 male NPT, so it is meant for exactly that ORFS-to-NPT hookup.
Question by: Chad O on May 5, 2025, 7:33 AM
Got a line running NPT on one end and an SAE O-ring face seal on the other, does this fitting bridge those two without needing extra pieces in between?
Answer by: Customer Support on May 6, 2025, 5:31 PM
That's what it handles. One end is a 9/16-18 male SAE O-ring face seal and the other is a 3/8-18 male NPT, all in one straight body. No additional adapters or couplings needed to go between those two thread types.

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