20Pcs 302 Carbon Steel Self-Tapping Thread Inserts M2–M12
20Pcs 302 Carbon Steel Self-Tapping Thread Inserts M2–M12
20-Piece 302 Carbon Steel Self-Tapping Thread Inserts – M2 to M12
Restore stripped or damaged threads quickly and confidently with these 302 Carbon Steel Self-Tapping Thread Inserts. This 20-piece set covers a wide range of metric sizes (M2 through M12), making it an indispensable addition to any professional toolbox used in automotive, rail vehicle, industrial, or general mechanical assembly work.
Made in Mainland China.
Key Features
- Premium 302 Carbon Steel Construction: Engineered for high strength and long-lasting durability, these inserts withstand the demands of heavy-duty mechanical environments.
- Wide Size Range: Includes M2, M3, M4, M5, M6, M8, M10, and M12 inner thread sizes to cover virtually any fastener application.
- Self-Tapping Design: Simply drive each insert into a pre-drilled hole — no special tools required — and it instantly creates a strong, secure threaded connection.
- Automotive & Industrial Grade: Specifically designed for use in automotive, rail vehicle, and other demanding industrial applications where reliable thread integrity is critical.
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Versatile Size Options: Choose from multiple inner/outer thread configurations for a precise fit every time:
- Inner M2×0.4 / Outer M4.5×0.5
- Inner M3×0.5 / Outer M5×0.5
- Inner M4×0.7 / Outer M6.5×0.75
- Inner M5×0.8 / Outer M8×1
- Inner M6×1 / Outer M9×1
- Inner M6×1 / Outer M10×1.5
- Inner M8×1.25 / Outer M12×1.5
- Inner M10×1.5 / Outer M14×1.5
- Inner M12×1.75 / Outer M16×1.5
- 20 Pieces Included: Generous quantity ensures you always have the right size on hand for any repair or assembly task.
Specifications
| Material | 302 Carbon Steel |
| Type | Self-Tapping Thread Inserts |
| Sizes | M2, M3, M4, M5, M6, M8, M10, M12 |
| Quantity | 20 Pieces |
| Applications | Automotive, Rail Vehicle, Industrial, General Mechanical Assembly |
What's in the Box?
- 20 × Self-Tapping Thread Repair Inserts (assorted sizes)
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Frequently Asked Questions
Q: What sizes are included in this 20-piece self-tapping thread insert set?
A: The set covers inner metric thread sizes M2, M3, M4, M5, M6, M8, M10, and M12, with corresponding outer thread dimensions ranging from M4.5×0.5 up to M16×1.5 — giving you comprehensive coverage for most automotive and industrial fastener applications.
Q: Are these thread inserts suitable for automotive use?
A: Yes. These 302 carbon steel self-tapping thread repair inserts are specifically designed for automotive, rail vehicle, and heavy industrial applications, delivering the strength and durability needed in high-demand mechanical environments.
Q: Do I need special tools to install these self-tapping thread inserts?
A: No special installation tools are required. Simply drill the appropriately sized hole, then drive the insert in — the self-tapping design cuts its own thread path and locks securely in place for a reliable, long-lasting threaded connection.
Q: What material are these thread repair inserts made from?
A: These inserts are made from 302 carbon steel, chosen for its excellent mechanical strength and resistance to wear, making it well-suited for demanding repair and assembly tasks in both automotive and industrial settings.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.