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Steel Adapter, 7/16-20 Male SAE O-Ring Boss (Straight Thread O-Ring) Socket Hex Plug

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Description & Features

Ideal for demanding environments, the Steel Adapter 7/16-20 Male SAE O-Ring Boss (Straight Thread O-Ring) Socket Hex Plug is a robust component crafted from high-quality steel. Engineered for reliability, it features a 7/16-20 straight thread O-ring for secure connections and optimal sealing in hydraulic systems. The hex socket design ensures easy installation and maintenance, making it suitable for various industrial applications, including marine, military, chemical processing, pulp and paper, food and beverage processing, and off-shore drilling.

This Eaton Aeroquip product is part of the FF2138 series, renowned for its durability and performance in harsh conditions. With a catalog number of C1CV21, it belongs to a trusted range of hydraulic components known for their precision and quality. Its compact dimensions, with an A-dimension of 0.45 and a B-dimension of 0.19, make it easy to integrate into existing systems without compromising efficiency or space.

SKU: FF2138-04S

Supplier Part Number (MPN): FF2138-04S

Alternate Part Numbers: 2104-FF2138-4, C1CV21, MI-02607260, MINO-00015J37509, N2BPL004

Specifications

A
0.45
Alternate Part Numbers
Alternate Part Number 2104-FF2138-4, Alternate Part Number C1CV21, Alternate Part Number MI-02607260, Alternate Part Number MINO-00015J37509, Alternate Part Number N2BPL004
Application
Marine/Military, Chemical Processing, Pulp and Paper Industries, Food and Beverage Processing, Off-Shore Drilling
B
0.19
C
0.56
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Gender 1
13554
End Size 1
0.44
End Size 2
0.25
End Type 1
SAE ORB
Minimum Working Temperature
-40
Seal Part if Included
22617-4
Supplier Part Number
FF2138-04S
Thread 2
7/16-20
Thread Sealant
No
Tube I.D. 2
0.19
Tube O.D.
0.25
Tube O.D.
0.25
Product Weight
0.02 lbs

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Product Questions & Answers (4)

Question by: Wade W on Oct 7, 2025, 8:37 AM
Reckon this'll hold up for offshore drilling, or is it more for calmer waters?
Answer by: Customer Support on Oct 8, 2025, 2:36 PM
This adapter is suitable for marine/military applications, so it should handle the demands of offshore drilling.
Question by: Lyle T on Jun 25, 2025, 6:37 AM
got a 7/16-20 ORB port on a manifold. is this the right plug to cap it off
Answer by: Customer Support on Jun 27, 2025, 6:26 AM
For a 7/16-20 male SAE O-Ring Boss straight thread connection, this part is a socket hex plug that matches that thread callout. It is built as a straight thread O-ring style plug and it includes seal part 22617-4.
Question by: Scott T on Mar 5, 2026, 6:25 AM
does this plug work for marine setups or is it strictly industrial use?
Answer by: Customer Support on Mar 7, 2026, 6:44 AM
Marine is actually one of the listed applications for this adapter, along with chemical processing, food and beverage, pulp and paper, and offshore drilling. The steel construction and O-ring boss thread design hold up in environments where moisture and pressure are both concerns, so it fits right into a marine hydraulic circuit without issue.
Question by: Norm T on Jul 1, 2025, 10:39 AM
Will this Eaton Aeroquip adapter work in a saltwater environment on my boat?
Answer by: Customer Support on Jul 2, 2025, 6:22 PM
Given its applications include marine environments, this steel adapter should be suitable for use on your boat, even with exposure to saltwater. Consider regular checks for any signs of corrosion.