M5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless Steel
M5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless Steel
M5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless Steel
M5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless Steel
M5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless Steel
M5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless Steel
M5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless Steel
M5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless Steel
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M5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless SteelM5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless SteelM5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless SteelM5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless SteelM5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless SteelM5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless SteelM5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless SteelM5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless Steel

M5 M5.5 M6 M6.3 Phillips Truss Head Self Tapping Screws – A2 304 Stainless Steel

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$2.83 USD
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In stock (500 units), ready to be shipped

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Description

🔩 Truss Head Self‑Tapping Screws – A2 304 Stainless Steel (M5, M5.5, M6, M6.3)

When you’re fastening medium‑duty metal brackets, outdoor enclosures, or structural panels, a wide truss head makes all the difference. These Phillips truss head self‑tapping screws are machined from genuine A2 / 304 stainless steel, so they handle moisture, humidity, and light chemical exposure without a trace of red rust. The oversized truss head spreads clamping force across a larger area than a pan head, preventing pull‑through in sheet metal, plastic, and wood. Sharp, self‑tapping threads cut a clean mating path as you drive — no separate tap or nut required. Covering the exact diameters M5, M5.5, M6, and M6.3, this series covers the most commonly called-for medium metric sizes for HVAC, automotive brackets, steel framing, and outdoor equipment repair.

⚙️ Key Features – A2 Truss Head Self‑Tapping Screws

  • A2 / 304 stainless steel provides permanent corrosion resistance — won’t red‑rust in rain, humidity, or outdoor settings
  • Wide truss head distributes load to stop pull‑through in thin sheet metal, plastic, and wood
  • Self‑tapping thread cuts directly into steel, aluminum, wood, and composites — no pre‑tap needed
  • Phillips drive offers a secure, cam‑out‑resistant grip with standard screwdrivers
  • Available in four exact metric diameters: M5, M5.5, M6, and M6.3 — a size for medium‑duty structural fastening
  • Clean, burr‑free threads ensure consistent holding power and smooth driving
  • Ideal for HVAC ductwork, automotive brackets, outdoor enclosures, metal framing, and general fabrication

📋 Technical Specifications – A2 Stainless 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
M5 5.0 mm 1.6 mm 10.8 mm 2.8 mm 12 – 50 Truss Head Phillips A2 304 Stainless, Plain
M5.5 5.5 mm —* —* —* 16 – 60 Truss Head Phillips A2 304 Stainless, Plain
M6 6.0 mm 1.8 mm 13.1 mm 3.3 mm 16 – 60 Truss Head Phillips A2 304 Stainless, Plain
M6.3 6.3 mm —* —* —* 19 – 70 Truss Head Phillips A2 304 Stainless, Plain

* Length is thread length only (measured from under the head). Head dimensions for M5.5 and M6.3 are shown in the product photo; standard tolerances apply. Exact lengths vary by size – see listing options.

❓ Frequently Asked Questions – Truss Head Self‑Tapping Screws

🔸 Can I drive these screws directly into sheet metal without a pilot hole?

In thin sheet metal (up to about 1.5 mm), you can often self‑tap directly. For thicker steel or hard materials, a pilot hole around 80% of the thread diameter will make driving easier and give you the strongest thread engagement.

🔸 Will A2 stainless steel rust outdoors?

No. A2 / 304 stainless is highly resistant to red rust. It’s suitable for outdoor, marine‑above‑waterline, and humid environments. It won’t rust like carbon steel. For constant saltwater immersion, 316 is recommended.

🔸 What’s the advantage of a truss head over a pan head?

A truss head has a larger, flatter bearing surface. It spreads the clamping force over a wider area, which stops the head from pulling through thin or soft materials. It gives you a stronger hold without needing a separate washer.

🔸 How are the screw lengths measured?

All listed lengths are the thread length only, measured from directly under the truss head to the tip. Head thickness is additional, allowing you to precisely match the screw to your material thickness.

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