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The Stainless Steel Hex Plug 316 Class 300 Threaded NPT Casting Fitting is an essential component for sealing idle ports in various pipeline systems.
Applications
Class 300-pound threaded hexagonal pipe plugs are widely used in:
Water treatment facilities
Chemical auxiliary pipelines
General industrial fluid handling
Building water supply and drainage systems
The NPT threaded connection provides a simple, effective, and reversible sealing solution, suitable for terminal sealing of various medium and low-pressure pipelines.
Production Process
Our cast pipe fittings are produced using precision casting (sol silica) technology to achieve excellent dimensional accuracy and surface finish:
Creation of wax mold
Coating with multiple layers of refractory material
Standard: ASTM A351 (Material) / ISO 4144 (Dimensions, ref.)
Fitting Type: Hex Head Plug, Casting
Connection: Threaded NPT
Pressure Rating: Class 300
Application: Sealing Threaded Ports, Low-Pressure Systems
Size: Available in various sizes
Types of Cast Plugs
Casting plugs are used to safely block unused internal threaded ports on pipe fittings or pipelines. The most common types include:
Hexagonal Head Plug (Hex Plug): Most common design facilitating installation and removal using standard wrenches
Square Head Plug: Alternative design for specific tool requirements
Round Head Plug: For specific installation space requirements
Thread Types
Threaded pipe fittings primarily follow two major international thread systems:
NPT (American Standard Pipe Taper Thread): 60° thread angle, 1:16 taper for sealing (used in this product)
BSP (British Standard Pipe Thread): 55° thread angle, available as taper (BSPT) or parallel (BSPP)
CF8M/316 Material Properties
The use of CF8M/316 stainless steel ensures excellent durability and corrosion resistance:
Superior to 304 grade in resisting chloride and general industrial corrosion
Contains molybdenum for enhanced corrosion resistance
Prevents thread sticking or failure due to corrosion
Ensures long-term sealing reliability
Enables smooth disassembly during maintenance
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Year Established:
2006
Employee Number:
100~150
Ecer Certification:
Verified Supplier
Zhejiang seamless pipe co.,ltd. (SMLSCO) is a specialized stainless steel piping systems provider with 19 years of industry experience. We began by supplying cost-effective stainless steel seamless pipes but for now, Smlsco is more than pipes.
With 19 years of growth, we have establis... Zhejiang seamless pipe co.,ltd. (SMLSCO) is a specialized stainless steel piping systems provider with 19 years of industry experience. We began by supplying cost-effective stainless steel seamless pipes but for now, Smlsco is more than pipes.
With 19 years of growth, we have establis...