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VÖLKEL V-COIL thread repair kit in metal case, complete set with taps and inserts for professional thread restoration
Professional V-COIL STI hand taps, two-piece kit ideal for thread repair and precision cutting
Durable V-COIL tool for installing thread inserts securely into damaged or worn threads
V-COIL metal helical inserts for repairing internal threads in soft materials.
VÖLKEL V-COIL thread repair kit in metal case, complete set with taps and inserts for professional thread restoration
Professional V-COIL STI hand taps, two-piece kit ideal for thread repair and precision cutting
Durable V-COIL tool for installing thread inserts securely into damaged or worn threads
V-COIL metal helical inserts for repairing internal threads in soft materials.
Thread Repair Kits

Thread Repair Kits M 39 x 4.0 - 1.5D

Item no. 04231

€575.00

in stock - less than 10 pieces available
Application
V-COIL Thread Repair Kit M 39 x 4.0 – 1.5D | Stainless Inserts

V-COIL Thread Repair Kit M 39 x 4.0 – 1.5D

The V-COIL Thread Repair Kit M 39 x 4.0 – 1.5D is a complete solution to restore worn or damaged internal threads, reinforce softer materials and recover rejected parts. It creates new, strong and long-lasting threads ideal for maintenance, installation and small-series production.

How it works: First, cut a dedicated STI thread; then screw in a stainless steel wire insert (free running). The result is a durable internal thread—often stronger than the original.

Application & Advantages
  • Thread repair of damaged or worn-out threads
  • Thread reinforcement for materials with low shear strength
  • Recovery of rejected parts
  • Creation of new, highly stable and long-lasting internal threads
  • Perfect for maintenance, installation and small-series production
  • Wire thread inserts per DIN 8140, ISO 2 (6H), Type S – free running, stainless steel

Advantages:

  • Flexible use with a wide choice of inserts and drill sizes (up to M12)
  • High stock availability for standard and special sizes
  • Designed for hand thread cutting
  • Higher load capacity after repair due to improved thread properties
  • Corrosion and temperature resistance
  • Attractive, functional and robust metal case

Step-by-Step Instructions
  1. Preparation: Drill out the damaged thread to the correct core diameter (see chart), deburr edges and clean the hole.
  2. Cut STI thread: Use the STI hand tap M 39 × 4.0 with cutting oil; keep the tap perpendicular and feed evenly.
  3. Insert coil: Screw in the V-COIL free-running insert with the inserting tool until flush or slightly below the surface.
  4. Remove tang (if applicable): Carefully break off the drive tang using the correct tool.
  5. Inspection: Check with a screw or gauge; clean the repaired thread.

Technical Specifications
  • Brand: V-COIL
  • Nominal size: M 39 x 4.0
  • Repair length: 1.5D
  • Inserts: DIN 8140, Type S, free running, stainless steel, ISO 2 (6H)
  • Insert material: Stainless steel
  • Packaging: Metal case
  • GTIN (EAN): 4022835042310
  • SKU / Article No.: 04231

Contents
  • 1× STI Hand Tap ISO 529 HSS-G – M 39 x 4.0 (03064)
  • 10× V-COIL Wire Thread Insert, Free running, Type S – M 39 x 4.0 – 1.5D (07364)
  • 1× V-COIL Inserting Tool (Drive connector 3/4") – M 39 x 4.0 (08038)

Frequently Asked Questions (FAQ)

Can soft materials be repaired permanently?
Yes. The stainless-steel inserts reinforce the thread even in softer alloys.

What does 1.5D mean?
The insert length equals 1.5 times the nominal thread diameter.

Are the inserts corrosion-resistant?
Yes, they are stainless steel and resist corrosion and heat.

Do I need special tools?
The kit contains the essentials; cutting oil and a deburring tool are recommended.

Can I order replacement inserts?
Yes, V-COIL inserts are available separately in various lengths and sizes.

Questions about selection or use? Our team will be happy to help – please use the contact form.

Additional information
Material Wire Thread Inserts frostainless steel
Size M 39 x 4.0
Packing in metal case
EAN 4022835040637
Item number 04231
V-COIL Thread Repair Kit M 39 x 4.0 – 1.5D | Stainless Inserts

V-COIL Thread Repair Kit M 39 x 4.0 – 1.5D

The V-COIL Thread Repair Kit M 39 x 4.0 – 1.5D is a complete solution to restore worn or damaged internal threads, reinforce softer materials and recover rejected parts. It creates new, strong and long-lasting threads ideal for maintenance, installation and small-series production.

How it works: First, cut a dedicated STI thread; then screw in a stainless steel wire insert (free running). The result is a durable internal thread—often stronger than the original.

Application & Advantages
  • Thread repair of damaged or worn-out threads
  • Thread reinforcement for materials with low shear strength
  • Recovery of rejected parts
  • Creation of new, highly stable and long-lasting internal threads
  • Perfect for maintenance, installation and small-series production
  • Wire thread inserts per DIN 8140, ISO 2 (6H), Type S – free running, stainless steel

Advantages:

  • Flexible use with a wide choice of inserts and drill sizes (up to M12)
  • High stock availability for standard and special sizes
  • Designed for hand thread cutting
  • Higher load capacity after repair due to improved thread properties
  • Corrosion and temperature resistance
  • Attractive, functional and robust metal case

Step-by-Step Instructions
  1. Preparation: Drill out the damaged thread to the correct core diameter (see chart), deburr edges and clean the hole.
  2. Cut STI thread: Use the STI hand tap M 39 × 4.0 with cutting oil; keep the tap perpendicular and feed evenly.
  3. Insert coil: Screw in the V-COIL free-running insert with the inserting tool until flush or slightly below the surface.
  4. Remove tang (if applicable): Carefully break off the drive tang using the correct tool.
  5. Inspection: Check with a screw or gauge; clean the repaired thread.

Technical Specifications
  • Brand: V-COIL
  • Nominal size: M 39 x 4.0
  • Repair length: 1.5D
  • Inserts: DIN 8140, Type S, free running, stainless steel, ISO 2 (6H)
  • Insert material: Stainless steel
  • Packaging: Metal case
  • GTIN (EAN): 4022835042310
  • SKU / Article No.: 04231

Contents
  • 1× STI Hand Tap ISO 529 HSS-G – M 39 x 4.0 (03064)
  • 10× V-COIL Wire Thread Insert, Free running, Type S – M 39 x 4.0 – 1.5D (07364)
  • 1× V-COIL Inserting Tool (Drive connector 3/4") – M 39 x 4.0 (08038)

Frequently Asked Questions (FAQ)

Can soft materials be repaired permanently?
Yes. The stainless-steel inserts reinforce the thread even in softer alloys.

What does 1.5D mean?
The insert length equals 1.5 times the nominal thread diameter.

Are the inserts corrosion-resistant?
Yes, they are stainless steel and resist corrosion and heat.

Do I need special tools?
The kit contains the essentials; cutting oil and a deburring tool are recommended.

Can I order replacement inserts?
Yes, V-COIL inserts are available separately in various lengths and sizes.

Questions about selection or use? Our team will be happy to help – please use the contact form.

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