HELIFOUNER 920-Piece M3 Stainless Steel Screw Assortment

HELIFOUNER’s 920-piece M3 screw assortment combines hex socket and button head screws in multiple lengths, with nuts and washers listed among the components. Its M3 format and stated 304 stainless steel material suit buyers seeking a small-fastener selection for precision machinery and electronics projects.

At a glance

Two listed head styles cover hex socket and button head M3 screws.
The listing describes multiple screw lengths from 4mm to 30mm, plus matching nuts and washers.
Manufacturer claims 304 stainless steel and a labeled transparent storage box.
The listing names precision machinery, instruments, electronics, appliances, communications equipment and toys as possible applications.

Price

$9.99Save 50%

Reference price: ~~$19.99~~

Price checked: Nov 12, 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

iexcell 100 Pcs M3 x 30mm Thread Pitch 0.5 mm Stainless Steel 304 Hex Socket Button Head Cap Screws Bolts Kit

$8.96

M3 x 10mm(50 Pack) Button Head Hex Socket Cap Screws Bolts, Hex Drive Bright Finish Fully Machine Thread, Corrosion Resistant 304 Stainless Steel 18-8 Screws

$5.99

Pros and cons

Pros

The M3 assortment offers two head styles and several lengths, which can reduce the need to source each size separately.
Nuts and flat washers are listed alongside the screws, adding common matching fastener components.
The manufacturer describes a transparent, labeled box intended to help distinguish sizes.

Technical specifications

19 specifications

Identity
Brand	HELIFOUNER
Model	HELIFOUNER---Screw

Fastener details
Fastener size	M3
Thread size	m3-0.5
Thread type	Metric
Thread coverage	Fully Threaded
Thread style	Right Hand, M3, Coarse, Fully Threaded
Thread class	Standard
Drive system	Internal Hex
Head style	Hex Socket Head and Button Head
Fastener type	Hex Socket Head and Button Head Metric Screws
Screw point style	Machine
Item diameter	3 millimeters
Finish	Plain
Color	Silver
Number of pieces	920

Materials and finish
Material listed	Stainless Steel 304
Exterior finish	Stainless Steel

Dimensions and installation
Dimensions listed	7.2 x 4.2 x 1 inches

What to know before buying

The manufacturer describes this as 304 stainless steel and claims corrosion and oxidation resistance. These are listing claims, not independently verified performance results.
Small parts. Keep them away from children to prevent accidental swallowing. The package text also states a choking hazard for children under 6.

Listing details to confirm

The listing details are inconsistent: the title and size list include M3 x 14mm, while the feature list omits it, and the package breakdown gives quantities that do not reconcile with the stated 920-piece total. The description also lists hex wrenches and tweezers, while the title and feature list emphasize screws and nuts. Confirm the selected listing's contents and length assortment before purchase.

Who is it for?

A good fit for

People assembling or repairing M3 metric projects who want both hex socket and button head screws in assorted lengths.
Electronics, instrument or small-machinery hobbyists who can confirm that M3-0.5 threads and the listed screw lengths suit their project.

Less suited to

Buyers who need a confirmed, reconciled piece count or exact component quantities without checking the selected listing.
Projects requiring a thread size other than M3-0.5 or fasteners outside the listed length range.

HELIFOUNER 920-Piece M3 Stainless Steel Screw Assortment · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.8 / 5 · 155 ratings

5 stars85%85%
4 stars11%11%
3 stars1%1%
2 stars2%2%
1 star1%1%

Customer feedback highlights perceived quality, functionality, value and a broad selection, with examples mentioning solar battery busbars and FPV quad builds. Those uses suggest appeal for project work that needs assorted M3 fasteners, but feedback does not confirm thread compatibility or resolve the listing's inconsistent component counts. The overall rating distribution is mostly five-star, though it is not unanimous.

Positive themes

Customers praise perceived quality, functionality, value and the assortment's comprehensiveness.

Frequently asked questions

What screw thread size is listed?

The listing specifies M3 and thread size m3-0.5. Confirm compatibility with your project's mating threads.

Which screw head styles are included?

The title and specifications list hex socket head and button head screws.

Are nuts and washers included?

The feature text says matching nuts and washers are included, and the package breakdown lists them. However, the listing has inconsistent totals and additional components, so confirm the selected kit's contents.

Which lengths are listed?

The title and package breakdown list lengths from 4mm through 30mm, including 14mm. A separate feature list omits 14mm, so verify the included assortment.