Lubricate chains, bearings and machine components and cool machining operations.

Thread repair kit, UNF, f-coil, 1/4-1/2, Fervi E011/UNF
Also known as: wire thread insert kit, helical insert kit
Key features
- SizesUNF 1/4" - 1/2"
- STI taps1/4"x28 - 5/16"x24 - 3/8"x24 - 7/16"x20 - 1/2"x20
- Bits6,7 mm - 8,3 mm - 9,8 mm - 11,5 mm - 13 mm
- Threaded inserts1/4"=25 - 5/16"=25 - 3/8"=25 - 7/16"=10 - 1/2"=10
- Assembly tool5 Pcs
- Breaking tool5 Pcs
What it is
Thread repair kit, UNF, f-coil, 1/4-1/2, Fervi E011/UNF. Key specifications: sizes UNF 1/4" - 1/2", STI taps 1/4"x28 - 5/16"x24 - 3/8"x24 - 7/16"x20 - 1/2"x20, bits 6,7 mm - 8,3 mm - 9,8 mm - 11,5 mm - 13 mm.
These are tools and kits for repairing damaged threads: a larger threaded hole is made and a helical spring insert is screwed into it, restoring the original thread.
What it is for
Used in workshop machining of steel, aluminium and alloy parts, in mechanical maintenance of machinery and plant, during scheduled shutdowns or breakdowns and for vehicle maintenance, in the workshop and on the road.
How to use it
Drill out the damaged hole with the drill bit indicated by the kit, cut the new thread with the dedicated tap and screw in the insert with the installation tool to the specified depth. If applicable, remove the tang. Then screw the bolt into the restored thread. To remove an insert, use the extractor.
Where it is used
- Mechanical engineering industry
- Mechanical workshops
Technical data
- Sizes: UNF 1/4" - 1/2"
- STI taps: 1/4"x28 - 5/16"x24 - 3/8"x24 - 7/16"x20 - 1/2"x20
- Bits: 6,7 mm - 8,3 mm - 9,8 mm - 11,5 mm - 13 mm
- Threaded inserts: 1/4"=25 - 5/16"=25 - 3/8"=25 - 7/16"=10 - 1/2"=10
- Assembly tool: 5 Pcs
- Breaking tool: 5 Pcs
- Packaging dimensions (mm): 370 × 280 × 50
- Gross weight (kg): 2,62
Who it is for
Designed for industrial maintenance technicians and mechanics.
Related products
- Thread repair kit, UNF, f-coil, Fervi
- Thread repair kit, UNC, f-coil, Fervi E011/UNC9/16
- Centre lathe with clutch and digital readout Fervi T080F — from the category Workshop Bench Machines and Tools
- Topping-up can Fervi 0183/750 — from the category Industrial Lubrication and Technical Greases
- Set of stainless steel feeler gauges Fervi FG01/AI — from the category Analogue Distance Measuring Tools
- Browse the whole category: Turning, Milling and Threading Tools
Before you order
Tell us the quantities you need and the intended use: if there is a more suitable version, or an equivalent available sooner, we will let you know.
For prices and availability, request a quote from AMES Srl: we will reply with our quotation, delivery times and, where needed, an equivalent technical alternative.
Indicative price €137,40 – €229 + VAT
Incl. 22% VAT: €167,63 – €279,38
Indicative, excluding VAT, depends on quantity, ex works: the final price is the one in your quote
Source: Listino Fervi (fervi.com) · updated 21/07/2026
Specifications 10
| Sizes | UNF 1/4" - 1/2" |
|---|---|
| STI taps | 1/4"x28 - 5/16"x24 - 3/8"x24 - 7/16"x20 - 1/2"x20 |
| Bits | 6,7 mm - 8,3 mm - 9,8 mm - 11,5 mm - 13 mm |
| Threaded inserts | 1/4"=25 - 5/16"=25 - 3/8"=25 - 7/16"=10 - 1/2"=10 |
| Assembly tool | 5 Pcs |
| Breaking tool | 5 Pcs |
| Packaging dimensions (mm) | 370 × 280 × 50 |
| Gross weight (kg) | 2,62 |
| EAN | 8012667364663 |
| Item code | E011/UNF |
Compare with similar models
Technical data declared by the manufacturers. An empty cell means the figure is not declared.
| Feature |
This model
Thread repair kit, UNF, f-coil, 1/4-1/2, Fervi E011/UNF
|
Thread repair kit, BSF, f-coil, 1/4-1/2, Fervi E011/BSF
|
Thread repair kit, BSW, f-coil, 1/4-1/2, Fervi E011/BSW
|
Thread repair kit, metric, f-coil, Fervi E010B
|
|---|---|---|---|---|
| Brand | Fervi | Fervi | Fervi | Fervi |
| Sizes | UNF 1/4" - 1/2" | BSF 1/4" - 1/2" | BSW 1/4" - 1/2" | M6 - M14 mm |
| STI taps | 1/4"x28 - 5/16"x24 - 3/8"x24 - 7/16"x20 - 1/2"x20 | 1/4"x26 - 5/16"x22 - 3/8"x20 - 7/16"x18 - 1/2"x16 | 1/4"x20-5/16"x18-3/8"x16-7/16"x14-1/2"x12 | M6 x 1 - M8 x 1,25 - M10 x 1,5 - M12 x 1,75 - M14 x 1,25 |
| Bits | 6,7 mm - 8,3 mm - 9,8 mm - 11,5 mm - 13 mm | 6,6 mm - 8,3 mm - 9,9 mm - 11,5 mm - 13 mm | 6,6 mm - 8,3 mm - 9,9 mm - 11,5 mm - 13 mm | 6,3 mm - 8,3 mm - 10,4 mm - 12,4 mm |
| Threaded inserts | 1/4"=25 - 5/16"=25 - 3/8"=25 - 7/16"=10 - 1/2"=10 | 1/4"=25 - 5/16"=25 - 3/8"=25 - 7/16"=10 - 1/2"=10 | 1/4"=25 5/16"=25 3/8"=25 7/16"=10 1/2"=10 | M6=25 M8=25 M10=20 M12=15 M14=25 |
| Assembly tool | 5 Pcs | 5 Pcs | 5 Pcs | 5 Pcs |
| Breaking tool | 5 Pcs | 5 Pcs | 5 Pcs | 5 Pcs |
| View product → | View product → | View product → |
The perfect setup for this job
Everything you need in one place, from functionality to safety.
For the job
Make precise holes in steel, non-ferrous metals and plastics for screws, rivets and threads.
Drill and drive screws cordless, with an adjustable clutch to avoid stripping the screws.
For safety
Protect eyes and face from fragments, dust, splashes and impacts.








