Heli-Coil R11918 1/2-20 Thread Inserts, Pack of 6
Helicoil: Heli-Coil R11918 is a six-piece pack of 1/2-20 helical thread inserts. It suits buyers replacing inserts of this specified thread size, but the listing gives limited installation information and contains inconsistent thread-style details.
At a glance
- Six inserts are listed for a 1/2-20 inside thread size.
- Stainless steel is named in the product description and finish details, while another material field also lists aluminium.
- The listing provides dimensional and shear-strength claims, but no installation tools are specified in the package contents.
Reference price: $39.41
Price checked: Nov 13, 2026
View offerAhead of Black FridayExplore the selectionOften bought together
Pros and cons
Pros
- Pack of six can suit a repair needing several inserts of the listed thread size.
- The listing provides an inside thread size and thread class for matching purposes.
Technical specifications
22 specifications| Brand | Helicoil |
|---|---|
| Model | R11918 |
| Fastener type | Insert |
| Quantity | 6 |
| Inside thread size | 1/2-20 |
|---|---|
| Thread size | 1/2 |
| Thread type | Unified National Coarse (Unc) |
| Thread style | National Fine Thread Bonded Propeller |
| Thread coverage | Fully Threaded |
| Thread class | Class 2A |
| Material listed | Metal Stainless Steel Aluminum |
|---|---|
| Metal type | Aluminum, Stainless Steel |
| Exterior finish | Aluminium |
| Finish type | Stainless Steel |
| Colour | Factory |
| Maximum shear strength | 100000-125000 PSI |
|---|---|
| Compatible groove diameter | 0.5 inches |
| Screw head style | Flat |
| Drive style | External Hex |
| Grade rating | industrial |
| Dimensions listed | 6.9 x 6.4 x 1.3 centimetres |
|---|---|
| Weight listed | 5 g |
What to know before buying
Listing details to confirm
Thread details are inconsistent: the title and inside-thread field say 1/2-20, while the thread type is labelled Unified National Coarse (Unc) and the thread style is described as National Fine Thread Bonded Propeller. Material and finish fields variously name stainless steel, aluminium and metal. Confirm the insert's exact thread and material before purchasing. The listed six inserts and instruction guide do not establish that installation tools are included.
What’s in the box
Included- Six inserts
- Instruction guide
Who is it for?
A good fit for
- Buyers seeking a six-piece pack of inserts with a stated 1/2-20 inside thread size.
- Repair work where the required insert material and thread specifications have been confirmed against the application.
Less suited to
- Buyers who need a complete thread-repair kit with confirmed installation tools.
- Anyone who cannot verify the exact thread type and material needed for their repair.
Customer reviews on Amazon
- 5 stars
100% 100% - 4 stars
0% 0% - 3 stars
0% 0% - 2 stars
0% 0% - 1 star
0% 0%
The supplied rating information is uniformly five-star, but comes from only a small number of ratings and provides no written feedback. It cannot establish specific strengths or explain why people rated the inserts positively. Buyers should base fit decisions on the listed thread details, which include inconsistencies.
Frequently asked questions
How many inserts are listed?
The product title identifies a pack of six inserts.
What thread size is listed?
The inside thread size is given as 1/2-20. Other thread-type and thread-style fields conflict, so confirm the exact specification before ordering.
Are installation tools included?
The explicit contents list names the unit and an instruction guide. It does not list installation tools.
Alternative options
Foruly Head Bolt Thread Inserts Kit M11 x 1.5, 10PCS for Toyota 2AZFE | Stainless Steel, for Camry 2002-2013, Solara 2002-2005, RAV4 2004-2005, Highlander 2001-2013
$59.99
OMT Thread Repair Kit, 172pc Metric Thread Restorer Kit | M5 M6 M8 M10 M12 Sizes; Heat-Treated Steel, Stripped Thread Fixer, Automotive Mechanics, DIY Work
$45.99
SENNMONN M14x1.5 Metric Thread Repair Kit, 10PCS Solid Bushing Inserts | M14X1.5X17.8MM 304 Stainless Steel Inserts with HSS Drill & Tap, Counterbore & Installation Driver for Damaged Threads
$184.91
SENNMONN Thread Repair Inserts 3/8-16X0.520 INCH Insert Qty 10 Stainless Steel
$55.37
SENNMONN M14x1.5 Metric Thread Repair Kit, 10PCS Solid Bushing Inserts | M14X1.5X9.4MM 304 Stainless Steel Inserts with HSS Drill & Tap, Counterbore & Installation Driver for Damaged Threads
$190.14
Thread Repair Kit, M14x1.25 25Pcs | Restoration Set, Reconditioning Stripped Holes, High-Speed Steel, Engine Bay, Universal Vehicles
$80.01
13Pcs M13 X 1.5mm Oil Drain Plug Thread Repair Tool, Oil Pan Thread Repair Kit Oil Pan Screws Rethread Tool Kit Automotive Drain Tool Oil
$30.69
Shkalacar 30Pcs Metric Thread Repair Insert Kit Coil Thread Repair Kit Helicoil Thread Repair Kit for Damaged Stripped Tapped Holes with Steel Inserts Installation Tools and Storage Case (M11X1.5)
$26.79
50Pcs Stainless Steel Inner Thread Self Tapping Thread Inserts Set, Thread Reinforce Repair Tool with Storage Case, M3/M4/M5/M6/M8/M10/M12
$33.10
Self Tapping Thread Insert Kit，Acogedor 50Pcs Stainless Steel Inner Thread Self Tapping Thread Inserts Set Thread Reinforce Repair Tool,M3/M4/M5/M6/M8/M10/M12
$26.71
Gugxiom 50Pcs Stainless Steel Thread Repair Kit, Threaded Inserts for Plastic/Metal, Thread Reinforce Repair Tool M3/M4/M5/M6/M8/M10/M12/M14/M16 with Storage Case
$23.99
Tyenaza Thread Insert Nuts, 50Pcs Stainless Steel Self Tapping Helicoil Insert, M3-M12 Wire Thread Inserts Repair Sleeve Assortment Kit
$23.89
