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Steel Adapter, 3/8-18 Male NPT Countersunk Hex Plug

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Description & Features

This Eaton Aeroquip steel adapter features a 3/8-18 male NPT countersunk hex plug, suitable for various applications, including marine, military, chemical processing, pulp and paper, food and beverage, and off-shore drilling environments.

The adapter is manufactured by Eaton Aeroquip and has a catalog number of C1BC90. Dimensions A and B are 0.46 and 0.31 respectively.

SKU: 2222-6S

Supplier Part Number (MPN): 2222-6S

Alternate Part Numbers: C1BC90, MI-00298911, MINO-00015F47342

Specifications

A
0.46
Alternate Part Numbers
Alternate Part Number C1BC90, Alternate Part Number MI-00298911, Alternate Part Number MINO-00015F47342
Application
Marine/Military, Chemical Processing, Pulp and Paper Industries, Food and Beverage Processing, Off-Shore Drilling
B
0.31
Brand
Danfoss Power Solutions (II LLC Aeroquip)
Brand
Aeroquip
Pack Size
1.00
UOM
EA
End Gender 1
13554
End Size 1
0.38
End Size 2
0.38
End Type 1
NPTF
Minimum Working Temperature
-40
Supplier Part Number
2222-6S
Thread 1
3/8-18
Thread Sealant
No
Tube I.D. 1
0.31
Product Weight
0.03 lbs

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Product Questions & Answers (2)

Question by: Dustin H on Nov 29, 2025, 8:41 PM
trying to cap off a 3/8-18 npt hole, is this the right plug or am i mixin up threads?
Answer by: Customer Support on Dec 1, 2025, 6:27 AM
Thread-wise, it matches a 3/8-18 male NPTF plug, so it’s meant to screw into a 3/8-18 female pipe thread to close that port off.
Question by: Steve S on Feb 14, 2026, 2:53 PM
Will this plug work alright for sealing off a 3/8 NPT port on my hydraulic manifold? Just need something to keep the oil from leaking out.
Answer by: Customer Support on Feb 15, 2026, 3:14 PM
This Eaton Aeroquip adapter is designed to seal 3/8-18 NPTF external pipe threads. The countersunk hex design allows for tightening it down securely to prevent leaks.