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Thread Inserts
Slotted self-tapping inserts that clear chips through the sl
Type 308 Self-Tapping Threaded Inserts (Three-Hole Design)
- MaterialStainless Steel / Carbon Steel
- Installationdriven directly into the pilot hole (self-threading)
- StandardGB/T 197 (6H internal thread), company standard
- Typical substratealuminium, zinc alloy, engineering plastics
- Key inspectionsdriving torque, internal thread gauging, failure torque
Product overviewOverview
The design suits low-strength base materials — aluminium, zinc alloys, engineering plastics — because the base does not have to survive tapping torque, while the insert provides the high-strength internal thread for the bolt. The cutting slots also act as anti-rotation features, so the insert does not spin out with the bolt.
Material: Stainless Steel / Carbon Steel. It is driven straight into the pilot hole and cuts its own thread.
Key featuresFeatures
- Three-hole type cuts at the face for smoother torque on automated equipment.
- Cutting slots double as anti-rotation features.
- Carburised or alloy steel with zinc passivation; internal thread to 6H.
- M2–M4 with length and thread combinations made to drawing.
Typical applicationsApplications
- Zinc die-cast thread repair
- Engineering plastic reinforcement
- Automotive lightweight structures
Selection notesSelection
For blind holes choose the slotted type so chips have an escape path; for through holes on a fast line, the three-hole type is quicker.
Frequently asked questionsFAQ
How do I specify the Type 308 Self-Tapping Threaded Inserts (Three-Hole Design)?
What matters during installation of the Type 308 Self-Tapping Threaded Inserts (Three-Hole Design)?
| Material | Stainless Steel / Carbon Steel |
|---|---|
| Type | Self-tapping threaded insert |
| Standard | GB/T 197 (6H internal thread), company standard |
| Installation | driven directly into the pilot hole (self-threading) |
| Typical substrate | aluminium, zinc alloy, engineering plastics |
| Key inspections | driving torque, internal thread gauging, failure torque |
Driving and failure torque are sampled per lot, with the range recorded.Alternative materials and finishes can be quoted side by side during sampling, so cost and corrosion resistance can be traded off explicitly.
