Pan Head Round Head Machine Screws Phillips Drive Bolts M3.5 M4 Carbon Steel $14.66 USD

Pan Head Round Head Machine Screws Phillips Drive Bolts M3.5 M4 Carbon Steel

Name: Pan Head Round Head Machine Screws Phillips Drive Bolts M3.5 M4 Carbon Steel
Brand: HomeDIYer
SKU: GYJLTJLWJ04124x1
Price: 14.66 USD
Availability: InStock

$14.66 USD

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By HomeDIYer^®

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M3.5 M4 Phillips Pan Head Machine Screws — Multi-Material, Multi-Finish Metric Fasteners for Electronics & Mechanical Assemblies

Sourcing the right M3.5 or M4 pan head screw in the exact finish and length you need — without ordering from five different suppliers — is a real challenge. Whether you're assembling computer chassis, securing PCB components, building electric toys, or maintaining mechanical equipment, having the right material and surface treatment in one place saves time and reduces sourcing friction.

These Phillips pan head machine screws are available in two metric thread sizes — M3.5 and M4 — across a wide range of lengths from 4 mm to 44.5 mm. Nine material and finish options are offered: Carbon Steel with Bright Nickel, Black Zinc, Blue Zinc, White Zinc with thread-locking patch, Blue Zinc with thread-locking patch, Black Zinc with thread-locking patch, Colored Zinc, Copper with Nickel Plating, and Stainless Steel. Pack quantities of 100 or 200 pieces let you stock exactly what your project demands.

Ideal for computer chassis and PC component assembly, hard drives, optical drives, graphics cards, electric toys, motorcycles, fishing gear, furniture, and general DIY mechanical assemblies requiring metric M3.5 or M4 pan head fasteners.

✅ Metric thread standard · M3.5 & M4 · Phillips drive · Pan head (round head) profile · 9 material/finish options including thread-locking variants — compatible with standard M3.5 and M4 nuts, threaded inserts, and tapped holes

✅ Key Features of These M3.5 M4 Phillips Pan Head Machine Screws

🎨 9 Material & Finish Options — Carbon steel with bright nickel, black zinc, blue zinc, colored zinc, copper nickel plating, stainless steel, and three thread-locking variants (white/blue/black zinc with pre-applied locking patch). One product, every finish you need.
🔐 Thread-Locking Variants Available — "With Glue" options feature a pre-applied thread-locking patch that activates under torque, preventing loosening from vibration — ideal for electronics, motors, and dynamic assemblies.
📐 Wide Length Range — M3.5 in 6/12/18 mm; M4 in 4 to 44.5 mm across 14 length options including specialty D=5.5 mm and D=6.5 mm flange diameter variants for M4 x 8 mm.
💻 Electronics-Ready Sizing — M3.5 and M4 are the standard thread sizes for computer chassis, hard drives, optical drives, graphics cards, and PC component assemblies. Bright nickel and zinc finishes provide conductivity and corrosion resistance.
⚙️ Precision Pan Head Design — Round head profile with smooth, burr-free surface and uniform Phillips cross-drive recess. Evenly distributed thread force reduces stripping risk and ensures a secure, reliable hold.
📦 100 or 200 PCS Packs — Choose 100 PCS for small projects and prototyping, or 200 PCS for production runs and maintenance stock. Bulk packs deliver better per-unit value.

📐 Technical Specifications — M3.5 M4 Phillips Pan Head Machine Screws

Type	Pan Head (Round Head) Machine Screw — Phillips drive
Thread Standard	Metric (ISO)
Available Thread Sizes	M3.5 · M4
Available Lengths	M3.5: 6, 12, 18 mm · M4: 4, 5, 6, 7, 8 (D=5.5), 8 (D=6.5), 8, 8.5, 9.5, 10, 12, 13, 15, 16, 40, 44.5 mm
Drive Style	Phillips (cross) — #1 or #2 depending on size
Head Style	Pan Head / Round Head (low profile, rounded top)
Material Options	Carbon Steel / Stainless Steel / Copper
Finish Options	Bright Nickel · Black Zinc · Blue Zinc · White Zinc + Locking Patch · Blue Zinc + Locking Patch · Black Zinc + Locking Patch · Colored Zinc · Copper Nickel Plating · Stainless Steel
Thread-Locking Variants	Pre-applied locking patch on White Zinc, Blue Zinc, and Black Zinc variants
System of Measurement	Metric
Pack Quantities	100 PCS / 200 PCS
Typical Applications	Computer chassis, hard drives, optical drives, graphics cards, PCB assemblies, electric toys, motorcycles, fishing gear, furniture, general DIY mechanical assemblies

❓ Frequently Asked Questions

What materials are available for these screws?

These screws are available in multiple material and finish options: Carbon Steel with Bright Nickel, Carbon Steel with Black Zinc, Carbon Steel with Blue Zinc, Carbon Steel with White Zinc + thread-locking patch, Carbon Steel with Blue Zinc + thread-locking patch, Carbon Steel with Black Zinc + thread-locking patch, Carbon Steel with Colored Zinc, Copper with Nickel Plating, and Stainless Steel. Each finish offers different levels of corrosion resistance and conductivity.

What is the difference between "with glue" and standard variants?

Variants labeled "With Glue" feature a pre-applied thread-locking patch on the threads. This patch activates under torque and helps prevent the screw from loosening due to vibration, making them ideal for electronics, motors, and any application where vibration resistance is important.

What thread sizes and lengths are available?

Available thread sizes are M3.5 (lengths: 6, 12, 18 mm) and M4 (lengths: 4, 5, 6, 7, 8, 8.5, 9.5, 10, 12, 13, 15, 16, 40, 44.5 mm). Some M4 x 8 mm variants also specify outer flange diameters of D=5.5 mm or D=6.5 mm. Select your size and length from the options above.

What head style and drive type do these screws use?

These screws feature a pan head (round head) profile with a Phillips (cross) drive. A #1 or #2 Phillips screwdriver is typically used depending on the screw size. The pan head provides a low-profile, rounded top with a wide bearing surface.

Are these screws suitable for electronics and computer assemblies?

Yes. M3.5 and M4 pan head screws are widely used in computer chassis, hard drives, optical drives, graphics cards, sound cards, and other PC components. The bright nickel and zinc-plated carbon steel variants offer good conductivity and corrosion resistance for electronics environments.

What is the difference between the zinc finish options?

Bright Nickel offers a shiny silver appearance with good corrosion resistance. White Zinc provides a silver-white finish with moderate corrosion protection. Blue Zinc has a blue-tinted iridescent finish with slightly enhanced corrosion resistance. Black Zinc offers a matte black finish for aesthetic applications. Colored Zinc provides a multi-color iridescent finish. All zinc finishes provide corrosion protection superior to bare steel.

Are stainless steel variants available?

Yes. Stainless steel variants are available for select M4 sizes (M4 x 6 mm and M4 x 8 mm). Stainless steel offers superior corrosion resistance compared to zinc-plated carbon steel and is suitable for outdoor, humid, or corrosive environments.

How do I choose between 100 PCS and 200 PCS packs?

Choose 100 PCS for small projects, repairs, or prototyping. Select 200 PCS for production runs, maintenance stock, or larger assembly jobs where bulk quantity provides better per-unit value.

🛒 Select your Material, Thread Diameter x Length, and Amount above, then add to cart.