M3.5x4.5mm Aluminium Knurled Thumb Screws – Flat Head, Hand-Grip, PC Case
M3.5x4.5mm Aluminium Knurled Thumb Screws – Flat Head, Hand-Grip, PC Case
M3.5x4.5mm Aluminium Knurled Thumb Screws – Flat Head, Hand-Grip, PC Case
M3.5x4.5mm Aluminium Knurled Thumb Screws – Flat Head, Hand-Grip, PC Case
M3.5x4.5mm Aluminium Knurled Thumb Screws – Flat Head, Hand-Grip, PC Case
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M3.5x4.5mm Aluminium Knurled Thumb Screws – Flat Head, Hand-Grip, PC CaseM3.5x4.5mm Aluminium Knurled Thumb Screws – Flat Head, Hand-Grip, PC CaseM3.5x4.5mm Aluminium Knurled Thumb Screws – Flat Head, Hand-Grip, PC CaseM3.5x4.5mm Aluminium Knurled Thumb Screws – Flat Head, Hand-Grip, PC CaseM3.5x4.5mm Aluminium Knurled Thumb Screws – Flat Head, Hand-Grip, PC Case

M3.5x4.5mm Aluminium Knurled Thumb Screws – Flat Head, Hand-Grip, PC Case

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Beschreibung

 

M3.5x4.5mm Knurled Thumb Screws — Tool-Free Fastening for PC Case Builds

Anyone who has fumbled for a screwdriver just to swap a GPU or reseat a drive cage knows the frustration. PC builders, modders, and IT technicians who work inside cases regularly need a faster, cleaner solution. These M3.5x4.5mm aluminium knurled thumb screws are built for exactly that — secure, tool-free fastening that keeps your workflow moving.

Each screw features an M3.5 thread diameter with a 4.5mm (approximately 3/16") shank length and a flat knurled head machined from aluminium. The anodized finish is available in 10 colors — Black, Silver, Golden, Red Wine, Pink, Royal Blue, Sky Blue, Green, Purple, and Brown & Orange — so you can match or accent your build aesthetic. Packs are available in 1, 4, 10, 20, 50, and 100 pieces to suit single replacements or bulk workshop needs.

These thumb screws are well suited for securing expansion slot covers in ATX and Micro-ATX cases, fastening 3.5" and 2.5" drive bay brackets, and replacing lost or worn factory screws in server chassis and rackmount enclosures. The knurled grip makes them a practical choice for any hand-tightened M3.5 fastener application where tool-free PC case assembly is a priority.

ℹ️ Compatibility Note: These screws use an M3.5 metric thread — the standard for most ATX, Micro-ATX, and Mini-ITX PC cases. They are not compatible with UNC #6-32 threaded cases common in some older or US-market enclosures. Please verify your case thread specification before ordering.

✅ Key Features of These M3.5 Knurled Thumb Screws

  • 🔩Standard M3.5×4.5mm Sizing — Matches the metric thread standard used in the majority of ATX and Micro-ATX PC cases, making these a direct fit for expansion slot covers and drive bay brackets.
  • ✋Knurled Flat Head for Tool-Free Installation — The textured grip pattern on the flat head lets you hand-tighten securely without a screwdriver, speeding up panel swaps and component changes.
  • 🪶Lightweight Aluminium Construction — Aluminium keeps added weight minimal inside your chassis while offering adequate strength for light-duty panel and bracket fastening tasks.
  • 🎨10 Anodized Color Options — Choose from Black, Silver, Golden, Red Wine, Pink, Royal Blue, Sky Blue, Green, Purple, or Brown & Orange to coordinate with your build theme or RGB lighting setup.
  • 📦Flexible Pack Quantities — Available in 1, 4, 10, 20, 50, and 100-piece packs so you can order a single replacement screw or stock up for multiple builds without overpaying.
  • 🔄Direct Factory Replacement — Sized to replace lost or damaged OEM thumb screws in PC cases, server chassis, and rackmount enclosures that use M3.5 metric fasteners.

📐 Technical Specifications — M3.5 Flat Head Knurled Thumb Screws

Thread Standard Metric M3.5
Thread Diameter M3.5 (≈ 0.138")
Screw Length 4.5mm (≈ 3/16" / 0.177")
Head Style Flat / Knurled
Drive Style Hand-grip (no tool required)
Material Aluminium (anodized)
Available Colors Black, Silver, Golden, Red Wine, Pink, Royal Blue, Sky Blue, Green, Purple, Brown & Orange
Pack Quantities 1 / 4 / 10 / 20 / 50 / 100 pcs
Typical Application PC case expansion slots, drive bay brackets, server chassis panels
Thread Pitch See variant options
Head Diameter Contact us to confirm
Country of Origin Contact us to confirm
⚠️ Heads up: Aluminium threads can strip if over-tightened. Hand-tighten until snug — do not use a power driver or apply excessive torque.

❓ Frequently Asked Questions

What length are these thumb screws and how does M3.5x4.5mm translate to inches?

These screws have a thread diameter of M3.5 (approximately 0.138") and a screw length of 4.5mm (approximately 3/16" or 0.177"). This size is the standard used in most ATX and Micro-ATX PC cases for securing expansion cards and drive bays. If you are unsure, measure your existing screws or check your case manual before ordering.

How much clamping force can these thumb screws handle?

Aluminium thumb screws are generally intended for light-duty, tool-free fastening applications such as securing PC expansion slot covers, side panels, and drive cages. They are not designed for high-torque or structural load-bearing use. For applications requiring significant clamping force, a steel fastener is typically recommended.

Are these thumb screws suitable for outdoor or humid environments?

Aluminium naturally forms a thin oxide layer that provides moderate corrosion resistance, making it generally suitable for indoor and low-humidity environments. For prolonged outdoor or high-moisture exposure, an anodized or stainless steel fastener is typically a better choice. Contact us to confirm finish details for your specific use case.

What thread standard do these screws use — are they compatible with standard PC cases?

These screws use an M3.5 metric thread, which is the widely adopted standard for PC case thumb screws in ATX, Micro-ATX, and many Mini-ITX builds. They are generally compatible with motherboard trays, expansion slot brackets, and drive bay covers that accept M3.5 fasteners. If your case uses UNC #6-32 threads (common in some older or US-market cases), these screws will not fit — please verify your case specification before purchasing.

How do I choose the right color for my build?

We offer 10 anodized color options including Black, Silver, Golden, Red Wine, Pink, Royal Blue, Sky Blue, Green, Purple, and Brown & Orange. Choose a color that matches or accents your PC case, RGB lighting theme, or personal aesthetic. All colors are the same M3.5x4.5mm size and material — only the finish differs.

How many screws do I need for a typical PC build?

A typical ATX build generally uses 6–10 thumb screws for expansion slot covers and side panels. We offer packs of 1, 4, 10, 20, 50, and 100 pieces so you can order exactly what you need — whether it is a single replacement or a bulk supply for multiple builds or a workshop.

Can I use these screws without any tools?

Yes. The knurled flat head is specifically designed for hand-tightening without a screwdriver. The textured grip pattern on the head allows you to apply sufficient torque by hand for typical PC case assembly tasks. Avoid over-tightening, as aluminium threads can strip under excessive force.

🛒 Select your color and pack quantity above, then add to cart — ships from our US warehouse.

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