1 / 7HELIFOUNER M4 380-Piece Phillips Countersunk Screw Kit
HELIFOUNER M4 machine screw kit combines seven screw lengths with matching nuts, flat washers, and lock washers. Its M4-only assortment suits small repair and assembly jobs where countersunk Phillips screws are required, but the listing’s package breakdown does not align with its claimed 380-piece total.
At a glance
- Seven stated M4 lengths from 5 mm through 20 mm.
- Listing describes countersunk Phillips machine screws and matching nuts, flat washers, and lock washers.
- Manufacturer states the kit uses 304 stainless steel and is packed in a transparent labeled box.
Reference price: $12.99
Price checked: Nov 12, 2026
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Pros and cons
Pros
- Seven lengths provide options for different fastening depths while keeping to one M4 thread size.
- Nuts and both flat and lock washers are described as included, supporting basic through-fastening assemblies.
- The stated 304 stainless steel material is a relevant choice where corrosion resistance is desired.
Cons
- The assortment covers M4 only, so it does not supply other metric diameters.
- The listed package breakdown does not add up to the stated 380 pieces.
Technical specifications
14 specifications| Brand | HELIFOUNER |
|---|---|
| Model | HELIFOUNER-Machine-Screws |
| Material listed | Stainless Steel |
|---|---|
| Grade rating | 304 Stainless Steel |
| Finish | Plain |
| Color | Silver |
| Fastener type | Machine Screws |
|---|---|
| Nominal size | M4 |
| Diameter | 4 millimeters |
| Thread size | m4-0.7 |
| Head style | Flat |
| Drive | Phillips |
| Lengths listed | M4 x 5mm /6mm /8mm /10mm /12mm /16mm /20mm |
| Number of pieces | 380 |
What to know before buying
Listing details to confirm
The listing details are inconsistent: its 380-piece claim conflicts with the detailed breakdown, which totals 380 only if the screw quantities listed (20, 20, 20, 20, 20, 15, and 15), 50 nuts, and 100 each of flat and lock washers are summed, but those numbers actually total 380. The transparent box is described in feature text but is not in the detailed component inventory, so confirm the selected listing’s package contents.
Who is it for?
A good fit for
- DIY repairs and small assemblies that call for M4 Phillips countersunk machine screws.
- Buyers who want several M4 lengths plus matching nuts and washers in one assortment.
Less suited to
- Projects that need other screw diameters or lengths beyond the listed M4 options.
- Applications that require a verified material grade or precisely confirmed kit contents.
Customer reviews on Amazon
- 5 stars
63% 63% - 4 stars
26% 26% - 3 stars
11% 11% - 2 stars
0% 0% - 1 star
0% 0%
Only aggregate ratings are available, with a mostly positive distribution and some middle-rated responses. That gives a limited overall signal, but it does not establish how customers found the screw fit, material, or quantity accuracy. Check the package breakdown against project needs.
Frequently asked questions
What screw sizes are listed?
The set is M4 and lists lengths of 5, 6, 8, 10, 12, 16, and 20 mm.
What hardware is included?
The detailed package list names screws, 50 M4 nuts, 100 flat washers, and 100 lock washers. The description also says the kit comes in a transparent box, though the detailed component list does not include it.
Does the listed quantity add up to 380 pieces?
Yes. The detailed quantities add to 380: 130 screws, 50 nuts, 100 flat washers, and 100 lock washers.
What material is claimed?
The listing gives stainless steel as the material and separately specifies a 304 stainless steel grade rating. These are listing claims, not independent verification.
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Offer details
- Keep the small parts away from children. The listing warns of a choking hazard and says the parts are not for children under 6.