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Brass Adapter, 3/8-18 Male NPT Square Head Plug

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Alternate Part Numbers
Alternate Part Number C1HN81, Alternate Part Number MI-00333536, Alternate Part Number MINO-00925F73228
Application
Grease, refrigeration, instrumentation and hydraulic systems. Fuel, LP and natural gas available on special order.
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 Type 1
PTF SAE Short
L
0.82
Minimum Working Temperature
-65
Supplier Part Number
3151X6
Thread 1
3/8-18
Thread Sealant
No
Product Weight
0.07 lbs
Product Questions & Answers 2

Product Questions & Answers

Trying to cap off a 3/8-18 port, would this square head plug be the right thread for it?
Question by: Sherry C on Sep 25, 2025, 11:49 AM
For a 3/8-18 threaded port, this plug matches that thread size and it is a male end, so it’s meant to screw into a female 3/8-18 port to close it off.
Answer by: Customer Support on Sep 27, 2025, 10:52 AM
got a port i need to cap off, is this plug the right thread for 3/8 npt?
Question by: Earl R on Nov 26, 2025, 1:38 PM
For a 3/8-18 male NPT connection, this part matches that thread and is meant to plug or cap a port. It is a square head plug, so you have a solid grip point for install and removal.
Answer by: Customer Support on Nov 28, 2025, 6:54 AM

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