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Ss304 1/4'' Npt Pipe Size 18 Threads Per Inch 0.40'' Thread Engagement Screw Nipple Bushing

SS304 Hex Socket Plug / Threaded Bushing (1/4" NPT, Male)

Securely close off unused ports and terminate fluid lines with the Aomite SS304 Hex Socket Plug.

Also known as a flush-mount threaded bushing or pipe plug, this essential fitting is precision-CNC machined from solid AISI 304 stainless steel. Designed with a 1/4-inch NPT male thread, it features exactly 18 Threads Per Inch (TPI) and a strict 0.40-inch thread engagement depth to ensure a flawless, high-pressure, and leak-proof seal. The internal hex socket allows for flush installation using a standard Allen wrench, making it ideal for tight spaces in sanitary equipment, manifolds, and industrial pump systems. Backed by a 3-year warranty, we offer direct factory wholesale with OEM capabilities.

Quantity:
Color:	sliver
Size:	1‘’-10‘’
Availability:





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Model:
27
Brand:
AOMITE

Product Description

Technical Specifications

Parameter	Specification
Product Type	Hex Socket Plug / Threaded Pipe Bushing
Material Grade	Solid SS304 Stainless Steel
Thread Standard	NPT (National Pipe Taper) - Male Connection
Thread Size	1/4 Inch
Thread Pitch	18 Threads Per Inch (TPI)
Thread Engagement Depth	0.40 Inch (Precision machined for optimal sealing)
Drive Type	Internal Hex (Allen Socket)
Warranty	3 Years
Customization	OEM / ODM supported

What does "1/4 NPT, 18 TPI, 0.40 Thread Engagement" mean?

1/4" NPT
This indicates the nominal pipe size (1/4 inch) and the thread type (National Pipe Taper). The tapered design allows the threads to wedge tightly together to form a seal.
18 TPI
Stands for 18 Threads Per Inch. This is the strict manufacturing standard for a 1/4" NPT fitting to ensure it mates perfectly with female ports.
0.40" Thread Engagement
This is the optimal length (0.40 inches) of the plug that will physically thread into the female port to achieve a secure, pressure-resistant seal.

Why choose a Hex Socket Plug over a standard Hex Head Plug?

Flush Installation: A hex socket plug uses an internal Allen key drive. This allows the plug to sit completely flush with the surface of the equipment or manifold, saving space and preventing snag hazards.
Protection: Unlike external hex heads that can be easily stripped or rounded off by adjustable wrenches, the internal socket ensures secure torque application without damaging the exterior finish.