HEXPHANT M3 x 20mm Button Head Socket Screws, 50 Pack

Pack: HEXPHANT M3 x 20mm button head socket screws are listed as a 50-piece set with fully threaded machine threads and a black oxide finish. The listing describes stainless steel and 18-8/304 grade, though these material and finish claims are not independently verified.

At a glance

Button head with internal hex drive for socket-key installation.
Fully threaded M3 x 20 machine screws.
The listing describes the screws as black oxide 304 stainless steel, 18-8 grade.

Price

$4.09Save 50%

Reference price: ~~$8.19~~

Price checked: Nov 12, 2026

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Pros and cons

Pros

A 50-piece quantity suits projects needing multiple matching M3 x 20 fasteners.
Fully threaded metric screws and an internal hex drive are specified.
The listed button head offers a different profile from countersunk or flat-head screws.

Technical specifications

14 specifications

Identity
Brand	HEXPHANT

Dimensions and installation
Fastener size	M3 x 20
Listed dimensions	2 x 1 x 0.3 inches
Thread size	M3
Thread coverage	Fully Threaded
Thread type	Metric
Thread style	Right Hand
Head style	Button
Drive system	Internal Hex
Point style	Flat Point

Materials and finish
Material listed	Stainless Steel
Exterior finish	Black Oxide

Package quantity
Number of pieces	50
Number of packs	1

What to know before buying

Listing details to confirm

The title and feature text call these black oxide 304 stainless steel, 18-8 grade, while the technical material field only says stainless steel. Confirm the exact material and whether a hex key is included, since the title says 50 pack but the set name and feature text claim a tool.

Who is it for?

A good fit for

Buyers needing M3 x 20 fully threaded button head screws for a compatible assembly.
DIY, furniture or equipment repair projects where metric fasteners and an internal hex drive are appropriate.

Less suited to

Projects requiring a different thread size, screw length or head profile.
Buyers who need a confirmed steel grade or guaranteed hex-key inclusion without checking the selected listing.

HEXPHANT M3 x 20mm Button Head Socket Screws, 50 Pack · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 63 ratings

5 stars72%72%
4 stars9%9%
3 stars5%5%
2 stars4%4%
1 star10%10%

The supplied evidence contains aggregate ratings but no written customer feedback. The rating distribution is mostly five-star, with a smaller spread across lower ratings, so it indicates varied overall impressions but does not establish what buyers liked or disliked. It cannot confirm the listed dimensions, steel grade, finish or whether a tool is supplied.

Frequently asked questions

What size are these screws?

The listing identifies them as M3 x 20, with an M3 metric thread and fully threaded design.

What drive and head do they use?

They are listed with a button head and an internal hex drive.

Is a hex key included?

The feature text claims 50 screws plus one hex spanner, but the title and package information do not confirm the tool. Check the selected listing before buying.

What material are they?

The specifications list stainless steel. The title and feature text further claim black oxide 304 stainless steel, 18-8 grade, so confirm the precise material if it matters to your application.