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Sealing Products
Steel ball expansion sealing plug: a ball is driven into the
Product Center · Plugs
Steel Ball Expansion Sealing Plugs
Steel ball expansion sealing plug: a ball is driven into the plug body, expanding it against the bore for a low-profile seal.
Key specifications
- 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. Driving the ball expands the sleeve radially, so the seal is made by interference along a defined band. Because the ball is a press fit, the plug is effectively permanent: removing it disturbs the expanded band and a new plug is needed.
Material: Brass / Stainless Steel. It is threaded in, sealing either radially or on the face.
Key featuresFeatures
- Ball expansion is a permanent joint; remove and replace.
- Brass, stainless or aluminium bodies for different media.
- Radial or face sealing, chosen to match hole quality.
- Expanding designs compensate for hole size variation in as-cast ports.
Typical applicationsApplications
- EV drive cooling cavities
- Pneumatic component bodies
- Pump and compressor housings
Selection notesSelection
Use where the port is closed once and never reopened; for serviceable ports choose a threaded plug with an O-ring.
Frequently asked questionsFAQ
Can a ball expansion plug be reused?
No. Removal deforms the expanded band, so re-inserting the same plug will not reproduce the interference that made the seal.
What matters during installation of the Steel Ball Expansion Sealing Plugs?
Thread it in, sealing either radially or on the face. Ball expansion is a permanent joint; remove and replace.
Specifications
| Material | Brass / Stainless Steel |
|---|---|
| Sealing | O-ring seal |
| Standard | GB/T 197, GB/T 3452.1 |
| Head style | pan head |
| Installation | threaded in with radial or face sealing |
| Typical substrate | process and test ports |
| Key inspections | pressure hold, seal hardness |
Manufacturing and inspection
Threads gauged and sealing-face roughness sampled.Material certificates and dimensional records accompany each lot; material and dimensional records are supplied per batch.
