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Steel Adapter, 3/4-16 Male SAE O-Ring Boss (Straight Thread O-Ring) Socket Hex Plug

Description & Features

This Eaton Aeroquip steel adapter features a 3/4-16 male SAE O-ring Boss (Straight Thread O-Ring) connection and a socket hex plug. This adapter is suitable for a variety of applications.

Designed for use in demanding environments, this steel adapter is commonly used in marine and military applications, as well as chemical, pulp and paper, and food and beverage processing.

Dimensions include A: 0.56, B: 0.31, and C: 0.88.

SKU: FF2138-08S

Supplier Part Number (MPN): FF2138-08S

Alternate Part Numbers: C1CV24, MI-02056519, MINO-00015J90465

Specifications

Brand Aeroquip® by Danfoss	b Dimensions 0.31 in	Connection Size 1 1/2 in	Connection Type Male SAE ORB	Connection Type 1 Male SAE ORB	Dimension Standards SAE 090109B/J1926	Dimensions 0.58 in L x 0.88 in W	Finish Dura-Kote™	Fitting Type Plug	Hex Size 0.32 in	Material Steel	Material Construction Carbon Steel	Operating Temperature -40 to 250 deg F	Seal Material NBR	Series FF2138 Series	Thread Size 3/4-16	Tube OD 1/2 in

Similar Products

Model Number	Tube O.D.	Thread Size	A	B	C
FF2138-04S Steel ORB Socket Hex Plug	0.25	7/16-20	0.45	0.19	0.56
FF2138-06S Steel ORB Socket Hex Plug	0.38	9/16-18	0.48	0.25	0.69
FF2138-10S Steel ORB Socket Hex Plug	0.63	7/8-14	0.63	0.38	1
FF2138-12S Steel ORB Socket Hex Plug	0.75	1-1/16-12	0.75	0.56	1.25
FF2138-16S Steel ORB Socket Hex Plug	1	1-5/16-12	0.77	1.5	0.63
FF2138-03S Steel ORB Socket Hex Plug	0.19	3/8-24	0.38	0.13	0.5

Product Questions & Answers (4)

Question by: Hubert F on Jul 14, 2025, 6:27 PM

got a 3/4-16 male ORB port that needs to be capped off, this plug gonna seal it up right without needing any thread sealant tape or compound?

Answer by: Customer Support on Jul 16, 2025, 6:50 AM

No thread sealant needed on this one. The seal comes from the O-ring that's included with the plug, part number 22617-8. That O-ring seats against the boss face and does the sealing work, which is standard for SAE O-Ring Boss fittings. Keep the threads and seating surface clean and you'll get a solid seal without any tape or paste.

Question by: Harvey H on Apr 5, 2025, 1:08 PM

Reckon this'll hold up alright in a chemical plant environment? We use some pretty harsh stuff.

Answer by: Customer Support on Apr 6, 2025, 6:55 PM

Application-wise, this adapter is specified for chemical processing, so it should be suitable for that type of environment.

Question by: Wayne R on Oct 4, 2025, 12:20 PM

got a port i need to cap off, is this one of them straight thread o-ring boss plugs or am i lookin at the wrong thing

Answer by: Customer Support on Oct 6, 2025, 12:08 PM

Built for sealing an SAE O-Ring Boss straight thread port, this is a male ORB socket hex plug with 3/4-16 threads. It’s meant to close off an ORB port using the O-ring seal, not a tapered pipe thread seal.

Question by: Neal S on Nov 12, 2025, 11:02 AM

Will this here plug work alright in a marine hydraulic system?

Answer by: Customer Support on Nov 14, 2025, 6:32 AM

This Eaton Aeroquip adapter is suitable for marine applications, along with uses in chemical processing, pulp and paper, and even food and beverage industries.

Steel Adapter, 3/4-16 Male SAE O-Ring Boss (Straight Thread O-Ring) Socket Hex Plug

Description & Features

Specifications

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Product Questions & Answers (4)