Torx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm - HomeDIYer
Torx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm - HomeDIYer
Torx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm - HomeDIYer
Torx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm - HomeDIYer
Torx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm - HomeDIYer
Torx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm - HomeDIYer
Torx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm - HomeDIYer
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Torx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm - HomeDIYerTorx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm - HomeDIYerTorx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm - HomeDIYerTorx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm - HomeDIYerTorx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm - HomeDIYerTorx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm - HomeDIYerTorx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm - HomeDIYer

Torx Pan Head Machine Screws A2 Stainless Steel — M2 M2.5 M3 M4, 4mm–20mm

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$1.97 USD
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In stock (500 units), ready to be shipped

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Description

 

Torx Pan Head Machine Screws in A2 Stainless — Reliable Fastening for Electronics, Enclosures & Precision Assemblies

When a stripped Phillips head or a cam-out moment ruins your project, you need a drive system that holds. Engineers, makers, and repair technicians who work with small metric hardware know the frustration of soft-head screws that round out under load. These Torx pan head machine screws are designed for exactly those situations — delivering a secure, slip-resistant drive in a compact, corrosion-resistant package.

Each listing covers A2 stainless steel Torx pan head machine screws conforming to ISO 14583, available in thread diameters M2, M2.5, M3, and M4, with lengths ranging from 4mm (5/32") to 20mm (≈25/32"). Quantity options run from 1 piece up to 1,000 pieces per order, making it easy to stock exactly what your project or production run requires. The pan head profile provides a low-profile, wide-bearing surface suitable for thin sheet metal, PCB standoffs, and plastic enclosures.

Typical use cases include securing electronics enclosures and Raspberry Pi cases with M2.5 Torx screws, assembling aluminum extrusion frames and motor mounts with M3 or M4 fasteners, and replacing stripped screws in RC vehicles, drones, and precision instruments where a Torx drive machine screw resists cam-out under vibration.

🔩 Compatibility: ISO metric coarse thread (M2 / M2.5 / M3 / M4) — fits standard metric nuts, threaded inserts, and tapped holes per ISO 965. Not compatible with UNC/UNF inch threads.

✅ Key Features of These Torx Pan Head Machine Screws

  • ⭐Torx (6-Lobe) Drive — The hexalobular socket design transfers torque more efficiently than Phillips or slotted drives, virtually eliminating cam-out during installation of small metric machine screws in tight spaces.
  • 🛡️A2 Stainless Steel Construction — Manufactured from 18-8 austenitic stainless steel (ISO 3506 property class 70), offering solid corrosion resistance for indoor, outdoor, and light marine fastening applications.
  • 📐Pan Head Profile (ISO 14583) — The wide, flat underhead bearing surface distributes clamping load evenly, making these screws well-suited for thin sheet metal, PCB assemblies, and plastic panels where a countersunk head would crack the material.
  • 📦Flexible Quantity Options — Order from 1 piece for a quick repair up to 1,000 pieces for production runs, so you only pay for what you need without overstocking small metric Torx fasteners.
  • 🔧Wide Size Range — Covers M2 through M4 in lengths from 4mm to 20mm, spanning the most common sizes used in electronics enclosures, RC models, 3D printer frames, and light structural brackets.
  • ✅ISO Metric Coarse Thread — Standard pitch threads ensure compatibility with off-the-shelf metric nuts, heat-set inserts, and tapped aluminum or steel, reducing sourcing complexity for your assembly.

📐 Technical Specifications — Torx Pan Head Machine Screws

Drive Type Torx (Hexalobular / T-drive), ISO 10664
Head Style Pan Head, ISO 14583
Material A2 Stainless Steel (18-8 / 304 equivalent)
Property Class ISO 3506 — Class 70
Thread Standard ISO Metric Coarse (ISO 68-1 / ISO 965)
Thread Diameters M2, M2.5, M3, M4
Available Lengths 4mm (5/32"), 5mm (13/64"), 6mm (15/64"), 8mm (5/16"), 10mm (3/8"), 12mm (15/32"), 16mm (5/8"), 20mm (25/32")
Torx Driver Size Typically T6 (M2), T8 (M2.5), T10 (M3), T20 (M4) — confirm before use
Finish Natural stainless (no coating)
Quantity per Order 1, 10, 20, 50, 100, 200, 500, 1000 Pcs — see variant options
Magnetic? Weakly magnetic (typical of 304 stainless after cold working)
RoHS / REACH Contact us to confirm
⚠️ Size Note: If you are unsure which length to select, measure the material thickness and add 1–1.5× the thread diameter for engagement depth. See FAQ below for guidance.

❓ Frequently Asked Questions

How do I choose the right length for my Torx pan head machine screw?

A general rule is to select a length equal to the thickness of the material being fastened plus 1–1.5× the thread diameter for engagement. For example, fastening 4mm material with an M3 screw typically calls for an 8mm (5/16") or 10mm (3/8") screw. Always confirm thread engagement depth in your specific application.

What torque can these A2 stainless Torx screws handle?

A2 stainless steel (ISO 3506 property class 70) generally provides tensile strength of approximately 700 MPa. Recommended tightening torques are typically around 0.2–0.4 Nm for M2, 0.4–0.8 Nm for M2.5, 0.8–1.5 Nm for M3, and 1.8–3.0 Nm for M4. Always verify torque requirements for your specific joint design.

Are these screws suitable for outdoor or marine use?

A2 stainless steel offers good corrosion resistance for most outdoor environments. It is generally suitable for light marine exposure, garden fixtures, and outdoor electronics enclosures. For highly aggressive saltwater or chemical environments, A4 (316) stainless is typically recommended instead.

What thread standard do these machine screws use?

These screws use ISO metric coarse threads (M2, M2.5, M3, M4) conforming to ISO 68-1. They are compatible with standard metric nuts, threaded inserts, and tapped holes following ISO 965 tolerances. They are not compatible with UNC/UNF inch threads.

What Torx driver size do I need?

Pan head Torx screws in these sizes typically require T6 for M2, T8 for M2.5, T10 for M3, and T20 for M4. Always verify the drive size against the actual screw head before applying torque to avoid cam-out or damage.

How do I decide between M2, M2.5, M3, and M4?

Choose based on the tapped hole or clearance hole in your assembly. M2 and M2.5 are commonly used in electronics, RC models, and precision instruments. M3 is a versatile general-purpose size for enclosures, brackets, and small machinery. M4 is suited for higher-load applications such as structural brackets, motor mounts, and heavier assemblies.

Can I use these screws with plastic or aluminum?

Yes. These machine screws work well with threaded inserts in plastic (e.g., heat-set brass inserts) and with tapped aluminum. When threading directly into soft materials, use appropriate thread engagement depth — generally at least 1.5× the screw diameter — to ensure adequate pull-out strength.

🛒 Select your thread diameter, length, and quantity above, then add to cart — ships from our US warehouse.

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