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Steel Adapter, 3/8-18 Female NPT To 3/4-16 Male SAE O-Ring Boss (Straight Thread O-Ring), Straight

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Description & Features

Part of the Eaton Aeroquip 2216 Series, this Steel Adapter, 3/8-18 Female NPT To 3/4-16 Male SAE O-Ring Boss (Straight Thread O-Ring), Straight provides a reliable transition between NPT pipe threads and SAE O-ring boss (straight thread O-ring) ports in a compact, straight configuration.

Suited for demanding service environments, this adapter is specified for use in marine and military, chemical processing, pulp and paper, food and beverage processing, and off-shore drilling applications. The SAE O-ring boss end provides a positive, leak-resistant seal well suited to hydraulic systems operating in these industries.

With an A dimension of 1.25 inches, the adapter is designed for straightforward inline installation where a direct NPT-to-ORB connection is required. Refer to Eaton's fluid compatibility documentation to confirm suitability for specific media.

SKU: 2216-6-8S

Supplier Part Number (MPN): 2216-6-8S

Alternate Part Numbers: C1BC81, MI-00320223, MINO-00015F65791

Specifications

A
1.25
Alternate Part Numbers
Alternate Part Number C1BC81, Alternate Part Number MI-00320223, Alternate Part Number MINO-00015F65791, Alternate Part Number MINO-00925X09664
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
13553
End Gender 2
13556
End Size 1
0.38
End Size 2
0.75
End Type 1
NPTF
End Type 2
SAE ORB
Minimum Working Temperature
-40
Supplier Part Number
2216-6-8S
Thread 1
3/8-18
Thread 2
3/4-16
Thread Sealant
No
Product Weight
0.06 lbs

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Product Questions & Answers (2)

Question by: Ralph S on Jan 12, 2026, 6:09 AM
Got a 3/8 female NPT port on a pump housing and need to run a line out to a 3/4-16 SAE O-ring boss fitting, this the right adapter for that?
Answer by: Customer Support on Jan 13, 2026, 4:53 PM
That's what this one's built for. One end is 3/8-18 female NPT, the other is 3/4-16 male SAE O-ring boss straight thread. Threads right into your NPT port and gives you a clean SAE ORB male connection on the other side, all in a straight configuration so there's no angle to work around.
Question by: Freddie E on Feb 12, 2026, 6:44 AM
Will this adapter work to connect a 3/8" NPT pipe to a 3/4" SAE O-ring boss?
Answer by: Customer Support on Feb 13, 2026, 9:30 PM
Yes sir, that's exactly what this adapter is for. It's got a 3/8-18 Female NPT on one side and a 3/4-16 Male SAE O-Ring Boss on the other.