Manufactured from stainless steel, this 1/4-18 Male NPT countersunk hex plug is designed to seal and close off ports and lines in industrial fluid systems. The countersunk hex drive design allows installation in recessed or tight spaces where a standard external hex plug would not fit. With a hex size of 0.25 and a B dimension of 0.41, this compact fitting is well suited for applications where space is limited and a clean, flush-mount closure is required.
The Stainless Steel Adapter, 1/4-18 Male NPT Countersunk Hex Plug is part of the Ssp Fittings Corp pipe-to-pipe stainless steel adapter line, offering corrosion resistance appropriate for demanding industrial environments. The 1/4-18 NPT male thread provides a standard tapered connection compatible with common port configurations across a wide range of equipment.
SKU: CP-1/4
Supplier Part Number (MPN): 1/4CP
Alternate Part Numbers: C1FC34, MI-08748521, MINO-00766X96554
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Specifications
Alternate Part Numbers
Alternate Part Number1/4CP, Alternate Part Number C1FC34, Alternate Part Number MI-08748521, Alternate Part Number MINO-00766X96554
B
0.41
Brand
Ssp Fittings Corp
Brand
SSP Fittings Corp
Pack Size
1.00
UOM
EA
Hex
0.25
Supplier Part Number
1/4CP
Thread 1
1/4-18
Thread Sealant
No
Product Weight
0.08 lbs
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Product Questions & Answers (4)
Question by: Floyd R on Dec 20, 2025, 12:15 PM
what thread size is on this plug, is it the 1/4-18 NPT?
Answer by: Customer Support on Dec 22, 2025, 9:36 AM
That's correct, it's a 1/4-18 male NPT thread. The countersunk hex head style means it sits flush or recessed when installed, which works well when clearance is tight and a standard raised plug head would get in the way.
Question by: Jerry S on Aug 23, 2025, 6:50 AM
What size hex wrench do I need for this plug?
Answer by: Customer Support on Aug 24, 2025, 7:14 PM
You'll need a 0.25 inch hex wrench to install or remove this countersunk plug.
Question by: Freddie W on Sep 17, 2025, 9:56 AM
got a 1/4-18 npt port i need to cap off, is this the right plug?
Answer by: Customer Support on Sep 19, 2025, 6:11 AM
It is a 1/4-18 male NPT countersunk hex plug, so it matches a 1/4-18 NPT female thread.
Question by: Todd B on Oct 15, 2025, 7:45 PM
What size is that hex opening on the end?
Answer by: Customer Support on Oct 17, 2025, 10:23 AM
