Phillips Truss Head Self Tapping Screws – Black 304 Stainless Steel, M3 M4 M5 M6 $2.38 USD

Phillips Truss Head Self Tapping Screws – Black 304 Stainless Steel, M3 M4 M5 M6

Name: Phillips Truss Head Self Tapping Screws – Black 304 Stainless Steel, M3 M4 M5 M6
Brand: HomeDIYer
SKU: AdaahDZ14534x10
Price: 2.38 USD
Availability: InStock

$2.38 USD

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

You want the holding power of a wide truss head and the clean look of black hardware – but not at the expense of rust protection. That’s exactly why these Phillips truss head self-tapping screws are made from genuine A2-304 stainless steel and then hardened with a high‑temperature blackening treatment. The deep black finish isn’t paint or plating; it’s chemically bonded to the metal so it won’t chip, peel, or expose raw steel. The oversized truss head spreads clamping force wide to stop pull‑through in thin sheet metal, plastic, and wood, while the self‑tapping thread cuts its own path as you drive. Available in M3, M4, M5, and M6 diameters, these screws are a go‑to for automotive trim, outdoor enclosures, marine hardware, and any project where strength, style, and weather resistance must all show up.

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

A2-304 stainless steel delivers excellent corrosion resistance in wet, humid, and coastal environments – no red rust
High‑temperature blackening treatment bonds a matte black finish directly to the stainless surface – won’t flake or wear off
Wide truss head distributes clamp load to prevent pull‑through in thin materials like sheet metal, plastic, and fiberglass
Self‑tapping thread cuts instantly into metal, wood, and composites – no pre‑tap or pilot hole required in most cases
Phillips drive recess centers the bit and reduces cam‑out for smoother, faster installation
Available in four metric diameters (M3, M4, M5, M6) with multiple lengths to match your material stack‑up
Clean, burr‑free threads ensure consistent holding power and a professional result every time

📋 Technical Specifications – Black 304 Truss Head Self-Tapping Screws

Thread Spec.	Thread Diameter (d)	Thread Pitch	Head Diameter (dk)	Head Thickness (k)	Typical Lengths (mm)*	Head Style	Drive	Material & Finish
M3	3.0 mm	1.1 mm	6.5 mm	1.6 mm	8, 10, 12, 16, 20, 25	Truss Head	Phillips	A2-304 Stainless, Blackened
M4	4.0 mm	1.3 mm	8.7 mm	2.1 mm	10, 12, 16, 20, 25, 30, 40	Truss Head	Phillips	A2-304 Stainless, Blackened
M5	5.0 mm	1.6 mm	10.8 mm	2.8 mm	12, 16, 20, 25, 30, 40, 50	Truss Head	Phillips	A2-304 Stainless, Blackened
M6	6.0 mm	1.8 mm	13.1 mm	3.3 mm	16, 20, 25, 30, 40, 50, 60	Truss Head	Phillips	A2-304 Stainless, Blackened

* Lengths are thread length only, excluding head. Select your preferred size and length from the product variations. All dimensions meet metric standards.

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

🔸 Will the black finish wear off or rust over time?

No. The black finish is a high‑temperature oxidation process – not a paint or plating. It won’t chip, peel, or wear away under normal use. Because the screws are solid 304 stainless underneath, they stay corrosion‑resistant even if scratched.

🔸 How does a truss head work better than a pan head?

A truss head has a noticeably larger and flatter bearing surface. This spreads the clamping force wider, which means the screw head won’t sink into or pull through thin sheet metal, plastic, or soft wood. You get a stronger, cleaner hold without adding washers.

🔸 Do I need to pre‑drill a hole before driving these?

In thin sheet metal (up to about 1.2 mm), you can often drive them directly. For thicker steel, hard plastics, or dense wood, a small pilot hole will make driving easier and give you the strongest thread grip. The screws are self‑tapping, not self‑drilling, so they need a starting point in harder materials.

🔸 Are these screws magnetic?

304 stainless is generally non‑magnetic in the annealed state. After cold working (like thread forming), a very slight magnetic response can develop, but it’s negligible compared to ordinary steel. They’re safe for electronics and sensitive equipment.