Knurled Thumb Screws M8 M10 x 50-65mm Aluminium Hand Grip Knob Bolts High Type

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Knurled Thumb Screws M8 M10 x 50-65mm Aluminium Hand Grip Knob Bolts High Type

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By HomeDIYer®

Screw Size (Excluding Head): M8 x 50mm

Colour: Royal blue

Pack Quantity: 1Pcs

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$3.07 USD

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Knurled Thumb Screws M8 M10 — Tool-Free Hand Tightening for Panels & Enclosures

When you need to open, adjust, or secure a panel repeatedly without reaching for a wrench, standard hex bolts become a daily frustration. Makers, electronics assemblers, and equipment technicians who work with removable covers, rack-mount enclosures, and DIY fixtures need a fastener they can tighten and release by hand — quickly and reliably. These knurled thumb screws are designed exactly for that workflow.

Each screw features a wide-diameter aluminium knurled head with a high-profile cylindrical body for a firm finger grip, paired with a metric-threaded stainless steel shank. Available in M8 and M10 thread diameters with shank lengths of 50 mm (≈ 1.97 in), 55 mm (≈ 2.17 in), 60 mm (≈ 2.36 in), and 65 mm (≈ 2.56 in). The anodized aluminium head is offered in 10 colours — Royal Blue, Green, Golden, Dark Red, Black, Silver, Purple, Rose Red, Sky Blue, and Orange — so you can colour-code assemblies or match your build aesthetic.

Typical use cases include securing removable side panels on electronic enclosures, hand-tightening access covers on test equipment, fastening jig fixtures in woodworking or metalworking setups, and assembling DIY computer cases or 3D-printer frames where frequent access is needed.

⚙️ Compatibility: M8 or M10 metric-threaded holes. Verify thread pitch and clearance depth before ordering. Shank length is measured excluding the head.

✅ Key Features of These Knurled Thumb Screws

🖐️ Tool-Free Hand Tightening
Wide knurled aluminium head provides enough grip surface to tighten and loosen by hand, eliminating the need for a wrench on frequently accessed fasteners.

🔩 Stainless Steel Threaded Shank
The shank is stainless steel for corrosion resistance and thread durability, while the aluminium head keeps overall weight low — ideal for lightweight panel assemblies.

📐 Multiple Size Options
Choose M8 or M10 thread diameter combined with 50 mm, 55 mm, 60 mm, or 65 mm shank lengths to match your specific clearance and engagement requirements.

🎨 10 Anodized Colour Finishes
Anodized aluminium heads in 10 colours allow colour-coding of fastener positions, matching enclosure aesthetics, or simply personalising your build.

🏗️ High-Type Cylindrical Head Profile
The tall cylindrical head profile increases the contact area for your fingers compared to low-profile knobs, making repeated hand-tightening more comfortable during assembly work.

📦 Flexible Pack Quantities
Available in 1-piece, 2-piece, and 5-piece packs so you can order exactly what your project requires without overstocking.

📐 Technical Specifications — Knurled Thumb Screws

Thread Standard	Metric (ISO)
Thread Diameter	M8 / M10
Shank Length (excl. head)	50 mm / 55 mm / 60 mm / 65 mm
Head Material	Aluminium (anodized)
Shank Material	Stainless Steel
Head Style	Knurled cylindrical (high type)
Drive Style	Thumb / hand-tightened (no tool required)
End Type	Open (through-thread)
System of Measurement	Metric
Available Colours	Royal Blue, Green, Golden, Dark Red, Black, Silver, Purple, Rose Red, Sky Blue, Orange
Pack Quantity Options	1 Pcs / 2 Pcs / 5 Pcs
Head Diameter (approx.)	See variant options
Head Height (approx.)	See variant options

❓ Frequently Asked Questions

How do I choose between M8 and M10?

Match the thread diameter to the tapped hole or nut in your assembly. M8 has an 8 mm nominal thread diameter and M10 has a 10 mm nominal thread diameter. If you are unsure, measure the inner diameter of the existing threaded hole or check your equipment's documentation before ordering.

How do I choose the correct shank length?

The shank length is measured excluding the head. You need enough thread engagement — typically at least 1× the thread diameter (8 mm for M8, 10 mm for M10) — plus clearance for any panel thickness the screw passes through. Add your panel thickness to the minimum engagement length to determine the shortest suitable shank.

Are these screws strong enough for structural use?

These thumb screws are designed for hand-tightened, frequently accessed fastening applications such as panel covers, enclosure lids, and jig fixtures — not for high-torque structural joints. The stainless steel shank provides good tensile strength for typical panel-retention loads, but they should not be used as a substitute for torqued hex bolts in load-bearing or safety-critical assemblies.

Will the anodized colour chip or fade?

Anodizing is an electrochemical surface treatment that integrates into the aluminium rather than sitting on top like paint, so it is more resistant to chipping and peeling under normal handling. However, anodized finishes can wear in areas of repeated metal-to-metal contact over time. For indoor or light-duty outdoor use the finish is durable; avoid abrasive contact or harsh chemical exposure to preserve the colour.

Are these corrosion-resistant for outdoor or humid environments?

The stainless steel shank offers good corrosion resistance in most indoor and mildly humid environments. The anodized aluminium head also has inherent corrosion resistance. For prolonged outdoor exposure or salt-spray environments, consider whether additional sealing or a fully stainless fastener would be more appropriate for your application.

What is the difference between this "high type" and a standard knurled thumb screw?

"High type" refers to the taller cylindrical head profile. A taller head provides more surface area for your fingers to grip, making hand-tightening easier and more comfortable — especially when repeated frequently. Standard or "low type" knurled heads are shorter and flatter, which suits applications where head clearance is limited.

Can I use these with a standard nut instead of a tapped hole?

Yes. As long as the nut matches the thread — M8 nut for M8 screws, M10 nut for M10 screws — and the shank length is sufficient to pass through your material and engage the nut, these thumb screws work with standard metric hex nuts or wing nuts.

🛒 Select your screw size, colour, and pack quantity above, then add to cart.