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Sealing Products
High-precision threaded sealing plug: the thread locates and
High-Precision Threaded Sealing Plugs
- MaterialBrass / Stainless Steel
- Installationthreaded in with radial or face sealing
- StandardGB/T 197, GB/T 3452.1
- Typical substrateprocess and test ports
- Key inspectionspressure hold, seal hardness
Product overviewOverview
Plugs seal either radially or on the face. Thread and seal are separate here: the thread provides mechanical retention and the O-ring provides the seal, which means the plug is serviceable. The groove has to hold the O-ring at the right compression, and the chamfer at the hole entry has to be smooth enough not to cut the ring during insertion.
Material: Brass / Stainless Steel. It is threaded in, sealing either radially or on the face.
Key featuresFeatures
- Serviceable: replace the O-ring, reuse the plug.
- Radial or face sealing, chosen to match hole quality.
- Expanding designs compensate for hole size variation in as-cast ports.
- Integrated O-ring or rubber sleeve seals on installation without sealant.
Typical applicationsApplications
- Hydraulic manifold process holes
- Engine and gearbox test ports
- EV drive cooling cavities
Selection notesSelection
Specify the entry chamfer with the plug; a sharp or burred chamfer is the most common cause of a cut O-ring and a leak on first assembly.
Frequently asked questionsFAQ
Why does a new O-ring leak on first assembly?
What matters during installation of the High-Precision Threaded Sealing Plugs?
| Material | Brass / Stainless Steel |
|---|---|
| Sealing | O-ring seal |
| Standard | GB/T 197, GB/T 3452.1 |
| Installation | threaded in with radial or face sealing |
| Typical substrate | process and test ports |
| Key inspections | pressure hold, seal hardness |
Pressure hold test at 1.5 times working pressure, recording decay.We recommend a pilot assembly at the actual torque and mating part before locking the process parameters for volume.
