M4 Pan Head Phillips Self Tapping Screws – 304 A2-70 Stainless Steel $1.85 USD

M4 Pan Head Phillips Self Tapping Screws – 304 A2-70 Stainless Steel

Name: M4 Pan Head Phillips Self Tapping Screws – 304 A2-70 Stainless Steel
Brand: HomeDIYer
SKU: A0893-0
Price: 1.85 USD
Availability: InStock

$1.85 USD

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🔩 M4 Pan Head Self-Tappingg Screws – 304 A2-70 Stainless Steel

For a reliable, corrosion‑resistant fastener that taps its own threads in sheet metal, plastic, or wood, these M4 pan head self-tapping screws are a great pick. Manufactured from 304 A2‑70 stainless steel, they provide excellent resistance to rust and mild chemicals — ideal for indoor and outdoor use, including marine and coastal projects. The Phillips pan head sits cleanly on the surface, delivering a smooth, professional look while keeping the drive centered and easy. Because they are self-tapping, you skip the extra step of pre‑tapping or adding nuts; just drill a pilot hole (or drive straight through thin material) and go. BRT Fasteners supplies this single-diameter M4 screw in a variety of lengths, making it a go‑to choice for electronics chassis, automotive trim, light fixtures, furniture, and general repairs where strength and corrosion resistance matter.

⚙️ Key Features – 304 Stainless Pan Head Self-Tapping Screws M4

304 A2-70 stainless steel provides superior corrosion resistance in wet, humid, and marine environments
Self‑tapping thread cuts cleanly into sheet metal, wood, fiberglass, and plastic — no pre‑tap needed
Phillips pan head design offers a flat, flush fit and resists cam‑out during driving
M4 diameter in multiple lengths covers a wide range of light‑ to medium‑duty assembly tasks
Precision‑rolled threads are smooth, burr‑free, and provide consistent holding power
Non‑magnetic in the annealed state — safe for electronics and sensitive installations
Ideal for electronics enclosures, automotive accessories, marine hardware, and furniture assembly

📋 Technical Specifications – M4 Pan Head Self-Tappingg Screws

Size	Thread Diameter	Head Diameter (dk)	Head Thickness (k)	Typical Lengths (mm)*	Head Style	Drive	Material
M4	4.0 mm	~8.0 mm	~2.6 mm	8, 10, 12, 16, 20, 25, 30, 40, 50	Pan Head	Phillips	304 (A2-70) Stainless Steel

* Lengths are measured from under the head (thread length only). Exact head dimensions match GB/T845 and may vary slightly. Select your preferred length from the listing options.

❓ Frequently Asked Questions – M4 304 Stainless Self Tapping Screws

🔸 What does A2-70 stainless mean?

A2 is the international designation for 304 stainless steel — a chromium‑nickel alloy with excellent corrosion resistance. “70” indicates the minimum tensile strength (700 MPa) in the cold‑worked condition. So A2-70 gives you the rust protection of 304 stainless with the strength of a Grade 5 steel fastener.

🔸 Can I use these screws outside or in saltwater?

Yes. 304 stainless is widely used in coastal and marine environments. It resists red rust effectively, though in constant salt spray it can develop light surface tea staining. Periodic rinsing with fresh water keeps them looking bright.

🔸 Do I need to drill a pilot hole first?

In thin sheet metal (up to about 1.5 mm), you can often drive these screws directly without a pilot hole. For thicker steel, hard plastics, or dense wood, a pilot hole about 3.2 mm to 3.4 mm in diameter will make driving easier and extend thread life.

🔸 Will these screws work in hardwood?

Yes. The self‑tapping thread bites well into both softwood and hardwood. For very hard woods like oak or maple, a pilot hole is recommended to prevent snapping and ensure a clean installation.

🔸 Are these screws magnetic?

304 stainless is generally non‑magnetic in the annealed state. After cold working (such as thread forming or driving), a very weak magnetic response can develop, but it’s negligible compared to that of carbon steel. They are safe for most electronics and MRI‑adjacent installations.