Phillips Flat Head Self Tapping Screws – Black 304 Stainless Steel, M1.7–M6.3 $4.39 USD

Phillips Flat Head Self Tapping Screws – Black 304 Stainless Steel, M1.7–M6.3

Name: Phillips Flat Head Self Tapping Screws – Black 304 Stainless Steel, M1.7–M6.3
Brand: HomeDIYer
SKU: CXH16529x100
Price: 4.39 USD
Availability: InStock

$4.39 USD

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🔩 Flat Head Self-Tapping Screws – Black 304 Stainless Steel

When you need a screw that disappears into the surface, these flat-head Phillips self-tapping screws deliver a flush, snag‑free finish every time. Made from genuine A2/304 stainless steel and hardened with a high‑temperature blackening treatment, they combine the sleek, dark look of black oxide with the real corrosion resistance of 304 stainless – no paint, no plating that chips. The 90° countersunk head sits perfectly in standard holes, leaving nothing to catch on wiring, clothing, or moving parts. Sharp self‑tapping threads bite instantly into sheet metal, plastic, wood, and composites, eliminating tapping steps and nuts. From M1.7 micro‑fasteners for electronics up to M6.3 for larger metal brackets and outdoor equipment, this series covers your full range of light‑ to medium‑duty fastening. Whether you’re working on automotive panels, marine hardware, outdoor enclosures, or just want a rust‑proof, low‑profile screw that looks great, this black 304 stainless range has you covered.

⚙️ Key Features – Black 304 Stainless Flat Head Self-Tapping Screws

Genuine A2/304 stainless steel core provides excellent corrosion resistance in wet, humid, and coastal environments – won’t red‑rust
High‑temperature blackening treatment bonds a matte black finish directly to the stainless – no peeling or flaking
Flat 90° countersunk head sits flush with the surface for a clean, professional appearance and snag‑free operation
Self‑tapping thread cuts its own path into sheet metal, wood, plastic, and fiberglass – no pre‑tap or nut required
Phillips drive recess centers the bit and reduces cam‑out for faster, more controlled installation
Available from M1.7 up to M6.3 – covers everything from precision electronics to medium‑duty structural fastening
Lengths include the head, making it easy to accurately match the screw to your material stack‑up
Ideal for automotive trim, marine hardware, outdoor fixtures, appliance panels, and electronics enclosures

📋 Technical Specifications – Black 304 Stainless Flat Head Tapping Screws

Thread Spec.	Thread Diameter	Typical Lengths (mm)*	Head Style	Drive	Material & Finish
M1.7	1.7 mm	4 – 16	Flat 90° Countersunk	Phillips	A2/304 Stainless, High‑Temp Blackened
M2	2.0 mm	4 – 20	Flat 90° Countersunk	Phillips	A2/304 Stainless, High‑Temp Blackened
M2.3	2.3 mm	5 – 25	Flat 90° Countersunk	Phillips	A2/304 Stainless, High‑Temp Blackened
M2.6	2.6 mm	6 – 30	Flat 90° Countersunk	Phillips	A2/304 Stainless, High‑Temp Blackened
M3	3.0 mm	6 – 40	Flat 90° Countersunk	Phillips	A2/304 Stainless, High‑Temp Blackened
M3.5	3.5 mm	8 – 50	Flat 90° Countersunk	Phillips	A2/304 Stainless, High‑Temp Blackened
M4	4.0 mm	8 – 60	Flat 90° Countersunk	Phillips	A2/304 Stainless, High‑Temp Blackened
M4.8	4.8 mm	10 – 70	Flat 90° Countersunk	Phillips	A2/304 Stainless, High‑Temp Blackened
M5	5.0 mm	12 – 80	Flat 90° Countersunk	Phillips	A2/304 Stainless, High‑Temp Blackened
M6	6.0 mm	16 – 100	Flat 90° Countersunk	Phillips	A2/304 Stainless, High‑Temp Blackened
M6.3	6.3 mm	16 – 120	Flat 90° Countersunk	Phillips	A2/304 Stainless, High‑Temp Blackened

* Lengths are overall length (including head). Dimensional data follows GB/T equivalent standards. Select your exact size from the product listing options.

❓ Frequently Asked Questions – Black 304 Flat Head Self-Tapping Screws

🔸 Will the black finish ever rust or peel off?

No. The deep black color is a high‑temperature oxidation treatment that chemically bonds to the stainless steel. It won’t chip, flake, or wear off like paint. The screws remain corrosion‑resistant 304 stainless steel underneath, so they’ll stay clean even in outdoor and marine environments.

🔸 Is the flat head truly flush, or does it sit proud?

These screws feature a standard 90° countersunk head. When driven into a properly countersunk hole, the head sits completely flush or slightly below the surface. For thin sheet metal or soft plastic, the head will often pull itself flush without a separate countersink operation.

🔸 Can I use these in wood and plastic, or only sheet metal?

They work well across all these materials. The self‑tapping thread bites into sheet metal, hardwood, softwood, plastics, and fiberglass. A small pilot hole in very dense materials (like hard oak or thick steel) will make driving smoother and preserve thread life.

🔸 How are the lengths measured – including the head?

Yes, the listed lengths include the head (overall length). This is in contrast to many pan head or hex head screws, where the head height is excluded. Be sure to account for the head thickness when calculating material thicknesses.