Since its inception, Ganggu has focused on the development and manufacturing of high-quality hardware fasteners and precision CNC machining services.

Stainless Steel Thread Insert Kit, Metric M3-M8, 150 Pcs with Case 1

Stainless Steel Thread Insert Kit, Metric M3-M8, 150 Pcs with Case 2

Stainless Steel Thread Insert Kit, Metric M3-M8, 150 Pcs with Case 3

Stainless Steel Thread Insert Kit, Metric M3-M8, 150 Pcs with Case 4

Stainless Steel Thread Insert Kit, Metric M3-M8, 150 Pcs with Case 5

Stainless Steel Thread Insert Kit, Metric M3-M8, 150 Pcs with Case

150 Pcs Thread Insert Kit Stainless Steel, M3-M8 Metric, Thread Repair

150 pcs stainless steel thread insert kit, in stock — a metric thread repair insert assortment M3 M4 M5 M6 M8 (10 specifications, 1.5D & 3D) in a 10-compartment storage case. Diamond-shaped stainless wire and drive tang restore stripped threads to the original bolt size. A tanged wire thread insert set with storage case for stripped thread repair for aluminum, magnesium, cast iron, automotive, machinery and DIY. Inserts only (STI tap required); OEM/ODM label, box, packaging and in-box assortment customizable.

Brand name:

GG screw

MOQ:

Package:

Small Packing+Carton Packing+Pallet,support customized

Place of origin:

China

OEM&ODM:

Certificate:

ISO9001:2015, RoHs

Delivery time:

3-5 days

Spec:

Cover M3 M4 M5 M6 M8 ,150PCS.

Material:

stainless steel

View size guide

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After-sales service

Quality warranty, free re-delivery for defective/wrong items and lifelong free technical matching support for all orders.

Certificate

ISO9001:2015, RoHs

Service

Plenty of boxed fasteners in stock with fast delivery, all types support custom sizes and packages.

Package

Small Packing+Carton Packing+Pallet,support customized

Spec

Cover M3 M4 M5 M6 M8 ,150PCS

Material

stainless steel

150-PC STAINLESS STEEL THREAD INSERT SET — Metric Coarse Thread Assortment, 10 Specifications (M3–M8, 1.5D & 3D), 150 Pieces in One Storage Case.

Key Features & Callouts

1.Precision-Formed Stainless Steel

Stainless steel construction with a natural finish — corrosion resistant, durable for workshop and industrial environments.

2.Diamond-Shaped Wire

Diamond-shaped wire cross-section ensures strong contact between the internal and external threads for reliable load distribution.

3.Internal & External Threads

The coiled design forms threads on both the inside and outside of the insert, locking the insert into the parent material while providing a clean internal thread for the bolt.

4.Drive Tang

A small bent tang at the top enables controlled installation with the correct installation tool (tang broken off after installation).

5.Original Bolt Size Retained

Repairs stripped, worn or damaged tapped holes while retaining the original bolt size — no oversize re-tapping, no part replacement.

6.Wear Resistant & Reusable Threads

Strong thread performance with wear resistance — suitable for repeated assembly and disassembly cycles.

7.Strengthen Soft Parent Materials

Ideal for reinforcing threads in soft metals such as aluminum, magnesium and cast iron — stronger than the base material itself.

8.Classified Storage Case

Compact 10-compartment storage case with snap-lock lid — sizes classified, easy identification, retail-ready.

FOR REPAIR, MAINTENANCE & PRODUCTION — a practical metric assortment for common thread repair needs.

1 DAMAGED HOLE → 2 INSERT INSTALLATION → 3 RESTORED HOLE, ORIGINAL BOLT SIZE

This 150-piece stainless steel thread insert set is available from stock (in stock / ready stock). Standard stock configuration: 150 pcs/set, 10 metric coarse specifications (M3×0.5 – M8×1.25, 1.5D & 3D), stainless steel natural finish, packed in a 10-compartment storage case with retail label, 24 sets per export carton. Samples and bulk orders can ship promptly for wholesale, retail and private-label programs.

Beyond ready stock, we offer full OEM/ODM & private label services — ready for wholesale and private label:
Packaging,Box,Label,Assortment,Manual,Bulk & Carton...

FAQ

Q: What is included in the 150-piece thread insert set?

A: 150 stainless steel tanged wire thread inserts in 10 metric coarse specifications — M3×0.5 to M8×1.25 in both 1.5D and 3D lengths — with a 10-compartment storage case. Inserts only: STI taps and installation tools are not included.

Q: What are thread inserts used for?

A: Repairing stripped, worn or damaged internal threads while keeping the original bolt size, and reinforcing threads in soft metals like aluminum, magnesium and cast iron.

Q: What is the difference between 1.5D and 3D lengths?

A: 1.5D means the insert length equals 1.5 times its nominal diameter; 3D equals 3 times the diameter — 3D inserts provide a longer thread engagement for higher load applications.

Q: Do I need special tools to install these inserts?

A: Yes. Installation requires the correct STI tap and installation tools (not included in this inserts-only kit).

Q: Are these in stock? Can we customize?

A: Yes, this kit is in stock for prompt shipment. OEM/ODM services are available: custom label, color box, barcode, instruction manual, custom sizes and quantities, and bulk packing.

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