V-COIL Wire thread inserts, Refill pack Free running type S BSF 3/8 x 20 - 3.0 D (5 pcs.)

• Application: Thread repair of damaged or worn threads, thread reinforcement of materials with low shear strength, scrap reclamation
• Standard: DIN 8140
• Material: made of stainless steel
• Tolerance: 2B
• Nominal Size: Nominal size D BSF 3/8 - 3.0D
• Length: Length 3 D
• Packaging Unit: 5 pieces
• EAN: 4022835446668
• Article Number: 44666

Wire Thread Inserts: Also known as thread bushings or Helicoil inserts, these are spiral-shaped inserts that are installed in a larger thread to restore a damaged thread to its original size. They also serve to reinforce threads in soft materials like aluminum, creating a wear-resistant, high-load thread connection.

Type S (Standard): Type S stands for the standard version. It has the "free running" characteristic, which means that a screw later screwed in can move freely within the insert when not under tension. In contrast, "screw-locking" thread inserts (Type SL) provide an additional clamping effect.

BSF: BSF stands for "British Standard Fine" and is a British thread standard for fine pipe threads. The nominal size 3/8 x 20 indicates the nominal diameter (3/8 inch) and the number of threads per inch (20).

3.0 D: The designation "3.0 D" refers to the length of the installed thread insert. The "D" stands for the original thread diameter. The thread length is therefore 3 times the nominal diameter (3.0 x 3/8 inches). This information helps you select the correct length for your application.

DIN 8140: This standard specifies the exact requirements for wire thread inserts, including their dimensions and tolerances. Compliance with this standard guarantees that the thread insert is of high precision and reliability.

Tol. ISO 2 (6H): The tolerance class ISO 2 (6H) ensures that the finished thread meets internationally standardized requirements. 6H is the metric standard that is comparable to the ISO 2 of imperial threads. This guarantees that the new thread connection will perfectly match a standard screw.

You need a V-COIL thread repair kit to install these thread inserts. Follow these steps to correctly repair a thread:

1. Drill Out: Drill out the damaged thread using the special drill bit included in the V-COIL kit.
2. Thread Cutting: Cut the new, larger receiving thread into the prepared hole with the special V-COIL tap.
3. Tang Breaking: The installation tang of the thread insert must be broken off after installation. Use the tang breaking tool from the V-COIL kit for this.
4. Installation: Place the thread insert on the installation tool and slowly and carefully screw it into the newly cut thread. Make sure the insert is flush with the surface.
5. Tang Removal: Use the tang breaking tool to break off and remove the installation tang.
6. Finished: Your thread is now repaired and fully loadable again.

1. When should I use thread inserts?

Use thread inserts to repair a damaged thread or to reinforce a thread in a material that is prone to wear, such as aluminum.

2. Why is this package only a "refill pack"?

This package only contains the thread inserts. You need the special tools (drill bit, tap, installation and tang breaking tool) from a V-COIL thread repair kit to install the inserts correctly.

3. What does the designation BSF 3/8 x 20 mean?

BSF is a British thread standard. 3/8 indicates the nominal diameter in inches, and 20 is the number of threads per inch.

4. Can I also use these inserts for blind holes?

Yes, these thread inserts can be used in both through holes and blind holes. The installation tang breaks off at a predetermined breaking point and can be easily removed.

5. What is the advantage of stainless steel?

Stainless steel offers excellent corrosion resistance and is more durable than the base material. This ensures that the repaired thread is more durable and resilient.