M4 M5 POZI PAN HEAD ROUND HEAD MACHINE SCREWS BOLTS PHILLIPS DRIVE STEEL BLACK

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Sale price$3.52 USD
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In stock (500 units), ready to be shipped

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Description

M4 & M5 Phillips Pan Head Machine Screws — Black Zinc Steel, Fully Threaded, Metric

Stripped threads, mismatched hardware, and last-minute hardware store runs slow down every project. Whether you're a maker, maintenance tech, or serious DIYer, having the right metric machine screw on hand — in the right size and quantity — is non-negotiable. These M4 and M5 Phillips pan head machine screws are built for exactly that: reliable, repeatable fastening without the guesswork.

Each screw is manufactured from Grade 4.8 carbon steel with a black zinc finish, offering a tensile strength of approximately 400 MPa. The pan head profile provides a wide bearing surface ideal for sheet metal, electronics enclosures, and machinery panels. Thread diameters span M4 (4mm, pitch 0.7mm) and M5 (5mm, pitch 0.8mm), with lengths ranging from 4mm to 30mm — all fully threaded. Available in pack quantities from 5 to 1,000 pieces to match your project scale.

Common use cases include electronics assembly and PCB standoff fastening, HVAC and appliance panel assembly, 3D printer frame construction, rack-mount server and networking hardware, and general workshop or maintenance kits. The black zinc finish blends cleanly into dark-anodized aluminum and powder-coated steel enclosures.

🔩 Compatible with standard M4 and M5 tapped holes (ISO metric thread). Requires pre-tapped hole or nut. Phillips PH2 driver recommended for M4–M5.

    ✅ Key Features of These M4 M5 Phillips Pan Head Machine Screws

  • ⚙️ Grade 4.8 Carbon Steel — ~400 MPa tensile strength for dependable clamping force in general-purpose fastening
  • 🖤 Black Zinc Finish — corrosion-inhibiting coating with a clean matte-black appearance for electronics and machinery
  • 📐 Fully Threaded Shank — thread runs the full length for maximum engagement in thin materials and short blind holes
  • 🔧 Phillips (Pozi) Pan Head Drive — wide pan head distributes load; compatible with standard PH2 bits and power drivers
  • 📦 Flexible Pack Quantities — choose from 5 to 1,000 pieces; ideal for prototyping, production runs, or stocking a parts bin
  • 📏 Wide Size Range — M4 (4–20mm) and M5 (6–30mm) lengths cover the most common metric fastening scenarios in one listing

📐 Technical Specifications — M4 M5 Pan Head Machine Screws

Type Pan Head Machine Screw (Fully Threaded)
Drive Style Phillips / Pozi (PH2)
Thread Sizes M4, M5 (ISO Metric)
Available Lengths M4: 4–20mm | M5: 6–30mm
Thread Pitch M4: 0.7mm | M5: 0.8mm
Head Diameter M4: ~6.6mm | M5: ~8.5mm
Head Height M4: ~2.2mm | M5: ~3.2mm
Material Grade 4.8 Carbon Steel
Finish Black Zinc (Black Oxide + Zinc Plate)
Tensile Strength ~400 MPa (Grade 4.8)
System of Measurement Metric
Pack Quantities 5, 10, 15, 20, 30, 50, 80, 100, 150, 200, 250, 300, 400, 500, 800, 1000 pcs

❓ Frequently Asked Questions

What does the screw size designation mean (e.g., M4 x 8mm)?

The first number is the thread diameter (M4 = 4mm, M5 = 5mm) and the second number is the shank length measured from under the head. All screws are fully threaded.

Are these screws fully threaded?

Yes. All M4 and M5 pan head machine screws in this listing are fully threaded from tip to head, making them suitable for thin materials and short blind holes.

What driver bit do I need?

These screws use a Phillips (Pozi) drive. A standard PH2 Phillips bit is typically used for M4 and M5 sizes and is compatible with most power drivers and hand screwdrivers.

What is the black zinc finish and how corrosion-resistant is it?

Black zinc (black oxide + zinc plating) provides moderate corrosion resistance suitable for indoor and light-duty applications. For outdoor or high-humidity environments, stainless steel alternatives are generally recommended.

What grade are these screws and what does Grade 4.8 mean?

Grade 4.8 is a metric property class indicating a tensile strength of approximately 400 MPa and yield strength of 320 MPa — suitable for general-purpose fastening in electronics, machinery, and DIY projects.

How do I choose the right length for my application?

Generally, the screw should engage at least 1.5× the thread diameter into the receiving material. For M4, aim for at least 6mm of thread engagement; for M5, at least 8mm. Measure your material stack-up before selecting a length.

Can I use these in aluminum, plastic, or wood?

These are machine screws designed for use with pre-tapped holes or nuts. They work well in aluminum and steel. For plastic or wood, a self-tapping screw is generally more appropriate unless the material is already tapped.

What are the exact head dimensions for M4 and M5?

M4 pan head: diameter ~6.6mm, height ~2.2mm, thread pitch 0.7mm. M5 pan head: diameter ~8.5mm, height ~3.2mm, thread pitch 0.8mm.

🛒 Select your Thread Dia. x Length and Pack Quantity above, then add to cart.

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