Hex Socket Cap Head Self Tapping Screws – A2 Stainless Steel, M2–M6 $5.75 USD

Hex Socket Cap Head Self Tapping Screws – A2 Stainless Steel, M2–M6

Name: Hex Socket Cap Head Self Tapping Screws – A2 Stainless Steel, M2–M6
Brand: HomeDIYer
SKU: PENGGB02161x10
Price: 5.75 USD
Availability: InStock

$5.75 USD

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🔩 Hex Socket Cap Head Self Tapping Screws – A2 Stainless Steel (M2–M6)

When a standard Phillips or slotted screw can’t handle the torque, these hex socket cap head self-tapping screws step up. Cut from genuine A2 / SUS304 stainless steel, they give you the superb corrosion resistance that outdoor equipment, marine hardware, and food‑grade machinery demand – without a surface coating that can wear away. The internal hex drive lets you apply significantly more tightening force than a Phillips drive, and the deep socket cap head keeps the bit rock‑solid to virtually eliminate cam‑out, even in tight overhead or blind access spots. The coarse self‑tapping thread bites cleanly into sheet metal, wood, plastics, and aluminum, forming its own mating thread as you drive. No pre‑tap, no nut – just a drilled or punched hole. Covering the full practical range from M2 to M6 and lengths from 6 mm up to 50 mm, this series gives you one dependable, all‑stainless fastening platform for precision electronics, machinery brackets, furniture, and outdoor structural work.

⚙️ Key Features – A2 Stainless Hex Socket Self-Tapping Screws

A2 (304 / SUS304) stainless steel offers true corrosion resistance for outdoor, washdown, and humid environments – won’t red‑rust like carbon steel
Hex socket cap head allows high‑torque driving with a standard Allen key, reducing cam‑out and stripping in tough installations
Self‑tapping coarse thread cuts directly into sheet metal, wood, plastic, and composites – eliminates the need for separate tapping operations
Available in seven metric diameters (M2, M2.5, M3, M3.5, M4, M5, M6) and up to 50 mm in length – covers micro‑assembly to medium‑duty fastening
Natural, uncoated stainless finish maintains a clean, professional look and is fully recyclable
Precision‑rolled, burr‑free threads ensure smooth engagement and consistent holding power across the entire batch
Ideal for machinery panels, electronic chassis, automotive brackets, outdoor furniture, marine trim, and all‑weather DIY projects

📋 Technical Specifications – Hex Socket Cap Self-Tapping Screws

Thread Spec.	Thread Diameter	Typical Lengths (mm)*	Head Style	Drive	Material & Finish
M2	2.0 mm	6, 8, 10, 12, 14	Socket Cap	Hex (Allen) 1.5 mm	A2 / 304 Stainless, Natural
M2.5	2.5 mm	6, 8, 10, 12, 14, 16	Socket Cap	Hex (Allen) 2 mm	A2 / 304 Stainless, Natural
M3	3.0 mm	6, 8, 10, 12, 14, 16, 20, 25	Socket Cap	Hex (Allen) 2 mm	A2 / 304 Stainless, Natural
M3.5	3.5 mm	8, 10, 12, 14, 16, 20, 25, 30	Socket Cap	Hex (Allen) 2.5 mm	A2 / 304 Stainless, Natural
M4	4.0 mm	10, 12, 14, 16, 20, 25, 30, 35, 40	Socket Cap	Hex (Allen) 2.5 mm	A2 / 304 Stainless, Natural
M5	5.0 mm	12, 14, 16, 20, 25, 30, 35, 40, 50	Socket Cap	Hex (Allen) 3 mm	A2 / 304 Stainless, Natural
M6	6.0 mm	16, 20, 25, 30, 35, 40, 50	Socket Cap	Hex (Allen) 4 mm	A2 / 304 Stainless, Natural

* Length is measured from under the head (thread length only). Hex key sizes are indicated for reference. Select your exact diameter and length from the product options.

❓ Frequently Asked Questions – Hex Socket Self-Tapping Screws

🔸 Do I need a pilot hole before driving these screws?

Yes, for the best results. These are self‑tapping, not self‑drilling, so a pre‑drilled or pre‑punched hole is required. In thin sheet metal or soft plastic, a hole slightly smaller than the thread diameter works well. The screw will then cut or form its own mating thread as it’s driven in.

🔸 What size Allen wrench (hex key) do I need?

It depends on the screw diameter: M2 uses a 1.5 mm key, M2.5 and M3 use 2 mm, M3.5 and M4 use 2.5 mm, M5 uses 3 mm, and M6 uses a 4 mm hex key. A standard metric hex key set will cover all sizes.

🔸 Can these be used in wood or just sheet metal?

They work very well in wood, plastic, and composite materials, too. The coarse thread bites aggressively. In hardwoods, a small pilot hole is recommended to reduce driving torque and prevent snapping, especially in the smaller M2–M3 sizes.

🔸 Is the A2 stainless steel really rust‑proof?

A2 / 304 stainless is highly resistant to corrosion from fresh water, humidity, and mild chemicals. It will not develop the red rust that carbon steel does. For continuous saltwater immersion, marine‑grade 316 (A4) offers even better pitting resistance, but for outdoor, automotive, and marine‑above‑water applications, A2 is the industry standard.

🔸 Are the lengths given including the head?

No. All listed lengths are the thread length only (measured from directly under the head to the tip). The head height adds a small additional amount, so you can accurately match the screw length to your material thickness.