---
product_id: 63128001
title: "3520-4.00K M4 x 0.7 Thread Repair Kit"
brand: "powercoil"
price: "R$1116"
currency: BRL
in_stock: true
reviews_count: 1
category: "Power Coil"
url: https://www.desertcart.com.br/products/63128001-3520-4-00k-m4-x-0-7-thread-repair-kit
store_origin: BR
region: Brazil
---

# Precision M4 x 0.7 thread size Free running & screw locking options Corrosion & wear resistant stainless steel 3520-4.00K M4 x 0.7 Thread Repair Kit

**Brand:** powercoil
**Price:** R$1116
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your threads, upgrade your game.

## Quick Answers

- **What is this?** 3520-4.00K M4 x 0.7 Thread Repair Kit by powercoil
- **How much does it cost?** R$1116 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/63128001-3520-4-00k-m4-x-0-7-thread-repair-kit)

## Best For

- powercoil enthusiasts

## Why This Product

- Trusted powercoil brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Lock It Down:** Choose screw locking inserts to prevent bolt loosening under vibration—security you can trust.
- • **Compact Power:** Slim design fits seamlessly into existing parts without redesign, saving time and cost.
- • **Built to Endure:** Crafted from chromium-nickel stainless steel for unbeatable corrosion and heat resistance.
- • **Effortless Installation:** Compatible with manual or automatic tools for quick, professional-grade thread restoration.
- • **Thread Repair Reinvented:** Restore or upgrade threads with industrial-grade M4 x 0.7 inserts for lasting strength.

## Overview

The 3520-4.00K M4 x 0.7 Thread Repair Kit by PowerCoil delivers precision-engineered stainless steel wire inserts that restore or enhance internal threads with superior corrosion resistance and strength. Available in free running or screw locking variants, these compact inserts ensure durable, vibration-resistant fastening solutions ideal for professional repairs and upgrades.

## Description

Manufactured from high quality chromium nickel stainless steel, PowerCoil Wire Thread Inserts provide high strength internal threads that resist the effects of temperature and corrosion. Their unique design ensures superior threads whose compound performance cannot be reproduced by any other single fastening method. Available in two basic forms, free running or screw locking, they are much lighter and less expensive than any other equivalent type of thread insert and because of their compact size they can generally be incorporated into existing designs where no previous provision has been made. Free Running Produced from precision profiled austenitic stainless steel wire wound into a helical spiral, PowerCoil free running inserts have a spring like appearance. When installed, using any one of a variety of manual or automatic tools, they provide strong permanent internal threads which resist heat and corrosion. Once fitted, their position is maintained by the action of radial pressure between their coils and the flanks of the tapped hole. This pressure exists because their free diameter is larger by a calculated amount, than their installed diameter. Screw Locking Screw locking (or prevailing torque) inserts are of particular value in applications subject to the effects of cyclic vibration or impact. In addition to the benefits afforded by free running inserts, PowerCoil screw locking inserts offer the additional security of prevailing locking torque. This is achieved by the action of one or more polygonal grip coils positioned within the inserts l ength, which exert radial pressure on the male thread. Each grip coil consists of a number of tangential locking chords which protrude inside the minor diameter of the normal free running coils. As the male thread passes through these grip coils, the locking flats are displaced thus exerting radial pressure or prevailing torque on the male thread. On removal of the male thread, the locking coils relax to their original form permitting repeated assembly whilst retaining a measurable level of prevailing torque. Note: It is recommended that only close fit plated or lubricated bolts or screws are used with screw locking inserts.

Review: Works a treat - Used this kit to repair a Shimano mountain bike brake caliper. Worked a treat. No problems drilling the tapping size hole. I did borrow a 'T' tap wrench from work just to make life easier when tapping the hole for the powercoil.. All in all no problems.

## Features

- Used to repair damaged or worn out threads, they can also be used to create new stronger threads in original equipment.
- Provide a permanent, corrosion and wear resistant internal thread which is usually stronger than the original parent material thread.
- PowerCoil wire thread inserts are manufactured from precision profiled diamond shaped stainless steel wire and formed into a helical spiral.
- Available in free running (mimics a standard thread) or in thread locking (preventing bolts from vibrating loose).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007IBRJQC |
| Batteries Required? | No |
| Batteries included? | No |
| Customer Reviews | 4.8 4.8 out of 5 stars (4) |
| Date First Available | 18 Aug. 2014 |
| Included Components | 3520-4.00K |
| Item Package Quantity | 1 |
| Item Weight | 0.28 g |
| Item model number | 3520-4.00K |
| Manufacturer | PowerCoil |
| Part Number | 3520-4.00K |
| Product Dimensions | 16.51 x 8.26 x 1.91 cm; 0.28 g |

## Images

![3520-4.00K M4 x 0.7 Thread Repair Kit - Image 1](https://m.media-amazon.com/images/I/41osZZOPIPL.jpg)
![3520-4.00K M4 x 0.7 Thread Repair Kit - Image 2](https://m.media-amazon.com/images/I/61sI9Bvu0ML.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ Works a treat
*by M***D on 18 October 2018*

Used this kit to repair a Shimano mountain bike brake caliper. Worked a treat. No problems drilling the tapping size hole. I did borrow a 'T' tap wrench from work just to make life easier when tapping the hole for the powercoil.. All in all no problems.

## Frequently Bought Together

- PowerCoil 3520-4.00K M4 x 0.7 Thread Repair Kit
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**Shop now:** [https://www.desertcart.com.br/products/63128001-3520-4-00k-m4-x-0-7-thread-repair-kit](https://www.desertcart.com.br/products/63128001-3520-4-00k-m4-x-0-7-thread-repair-kit)

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-19*