Are these screws suitable for outdoor or marine use?

A2 (304) stainless steel offers good corrosion resistance for most outdoor environments. For highly corrosive marine environments with constant saltwater exposure, A4 (316) stainless steel is generally recommended.

Why choose Torx over Phillips or hex socket drive?

Torx drive distributes torque across six lobes, which in most cases reduces cam-out and bit wear compared to Phillips or hex socket drives, especially useful in high-cycle assembly or tight-access fastening.

M2–M10 A2 Stainless Steel Torx Button Head Machine Screws, With or Without Column, Pack of 5

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M2–M10 A2 Stainless Steel Torx Button Head Machine Screws, With or Without Column, Pack of 5

HomeDIYer

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By HomeDIYer®

Size: M2 x 3mm

Shape Type: Without column

Pack of Quantity(Pcs): 5

Price:

$1.84 USD

Stock:

In stock (500 units), ready to be shipped

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Torx Button Head Machine Screws — A2 Stainless Steel, M2 to M10, Low-Profile Six-Lobe Drive

When a Phillips or hex socket screw strips out mid-project, it kills momentum and can damage your workpiece. Makers, electronics assemblers, RC hobbyists, and furniture builders who need a reliable, tamper-resistant fastener with a clean, low-profile finish turn to Torx button head machine screws. The six-lobe drive transfers torque more evenly, dramatically reducing cam-out and bit wear compared to cross-head designs.

Each pack contains 5 pieces of A2 (304) stainless steel Torx button head machine screws. The domed, low-profile button head sits close to the surface for a clean, finished look. Available in two shape types — Without column (standard smooth underhead) and With column (raised collar between head and shank) — and in a wide range of metric sizes from M2 x 3mm (approx. 1/8 in) up to M10 x 80mm (approx. 3-1/8 in). All sizes use standard ISO metric coarse threads.

These screws are a go-to choice for electronics enclosure assembly (M2–M3 for PCB standoffs and panel fastening), RC car and drone builds (M2.5–M4 for lightweight structural joints), and furniture and fixture installation (M5–M10 for bracket mounting and hardware attachment). The A2 stainless construction also makes them a solid pick for outdoor garden furniture and any application where rust resistance matters.

🔵 Compatibility: ISO metric coarse thread (M2–M10). Fits standard metric nuts, threaded inserts, and tapped holes per ISO 68-1. Requires a Torx (six-lobe / TX) driver bit — T6 through T50 depending on size. Not compatible with UNC/UNF inch-standard fasteners.

✅ Key Features of These Torx Button Head Machine Screws

🔩Six-Lobe Torx Drive — The TX drive profile distributes torque across six contact points, virtually eliminating cam-out and reducing bit wear — ideal for high-cycle assembly or tight-access fastening.
🛡️A2 (304) Stainless Steel — Corrosion-resistant alloy suitable for indoor, outdoor, and mildly humid environments. A reliable choice for garden furniture, electronics enclosures, and general exterior DIY projects.
📐Low-Profile Button Head — The wide, domed head spreads clamping load over a larger surface area while keeping a slim, finished profile — great for applications where a flat or countersunk head would protrude too much.
🔄Two Shape Types Available — Choose Without column for a standard flush underhead, or With column for a raised shoulder that aids alignment and adds a clean standoff effect in visible assemblies.
📏Wide Size Range — M2 to M10 — From tiny M2 x 3mm screws for PCB and electronics work to robust M10 x 80mm fasteners for structural brackets, this range covers the most common metric machine screw applications.
⚡ISO Metric Coarse Thread — Standard thread pitch ensures compatibility with off-the-shelf metric nuts, barrel nuts, T-nuts, and threaded inserts — no guesswork on thread matching for your next build.

📐 Technical Specifications — Torx Button Head Machine Screws

Material	A2 (304) Stainless Steel
Drive Type	Torx / Six-Lobe (TX)
Head Style	Button Head (Low-Profile Dome)
Shape Types	Without column (standard) / With column (raised shoulder)
Thread Standard	ISO Metric Coarse (DIN 7380 / ISO 7380)
Size Range	M2 through M10
Length Range	3mm (approx. 1/8 in) to 80mm (approx. 3-1/8 in)
Pack Quantity	5 pieces per pack
Torx Bit Size	See variant options (T6–T50 depending on diameter)
Finish	Natural stainless (uncoated)
Tensile Strength	Typically approx. 700 MPa (A2-70 class) — contact us to confirm
Country of Origin	See variant options

⚠️ Note: These are machine screws — they require a pre-tapped hole, threaded insert, or nut. They are not self-tapping. If you are unsure which size fits your application, please contact us before ordering.

❓ Frequently Asked Questions

How do I choose the right size and length for my application?

Match the thread diameter (M2, M3, M4, etc.) to your tapped hole or nut size. For length, the screw should generally engage at least 1.5x the thread diameter into the material. For example, an M4 screw threading into aluminum typically needs at least 6mm of thread engagement. Quick mm-to-inch reference: 10mm = 3/8 in, 20mm = 25/32 in, 25mm = 1 in, 30mm = 1-3/16 in, 50mm = 2 in.

What is the difference between With column and Without column?

Without column is a standard button head screw — smooth domed head, flat underside. With column features a small cylindrical collar (shoulder) between the head and the shank. This collar can help with alignment in counterbored holes or provide a decorative standoff effect in visible assemblies such as panel mounting or furniture hardware.

How strong are these screws — what load can they handle?

A2 stainless steel screws are generally rated to property class A2-70, with tensile strength typically around 700 MPa. Actual load capacity depends on the screw size, thread engagement depth, and the base material. For structural or safety-critical applications, please contact us to confirm specifications for your specific size.

Are these screws suitable for outdoor or marine environments?

A2 (304) stainless steel offers good corrosion resistance and is generally suitable for outdoor use — garden furniture, outdoor enclosures, exterior fixtures. For highly corrosive environments such as coastal or marine applications with constant saltwater exposure, A4 (316) stainless steel is generally recommended for longer service life.

Are these compatible with standard metric nuts and threaded inserts?

Yes. These screws use standard ISO metric coarse threads (M2 through M10) per ISO 68-1. They are fully compatible with standard metric hex nuts, nylon lock nuts, barrel nuts, T-nuts, and heat-set or press-fit threaded inserts. Not compatible with UNC or UNF inch-standard fasteners.

What Torx driver bit size do I need?

Can I use these screws in plastic or wood?

These are machine screws — they are not self-tapping. For plastic, use a heat-set or press-fit threaded insert first. For wood, a T-nut or barrel nut is typically used. Direct threading into plastic or wood without an insert is not recommended, as it will generally strip out under load.

Why choose Torx over Phillips or hex socket (Allen) drive?

Torx drive distributes torque across six lobes rather than four (Phillips) or six flat faces (hex socket), which in most cases reduces cam-out and bit wear — especially useful in high-cycle assembly or when working in tight spaces where you cannot apply direct downward pressure on the bit.

🛒 Select your size, shape type, and quantity above, then add to cart — ships from our US warehouse.