M5 x 70-100mm Knurled Thumb Screws Shoulder Bolts Aluminium Hand Grip Knob High

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Description

M5 Knurled Thumb Screws — Aluminium Shoulder Bolts for Tool-Free Fastening

When you need to open an enclosure, swap a panel, or adjust a jig without reaching for a screwdriver, standard hex bolts become a daily frustration. Makers, electronics assemblers, and workshop enthusiasts who work with removable covers or frequently accessed compartments need M5 knurled thumb screws that can be tightened and released by hand — quickly and reliably.

These M5 aluminium knurled thumb screws are machined from aluminium alloy with a knurled cylindrical head for a secure hand grip. Available in lengths from 70 mm (~2.76 in) to 100 mm (~3.94 in) in 5 mm increments, and in 10 anodized colour options including Black, Silver, Royal Blue, Green, Golden, Dark Red, Purple, Rose Red, Sky Blue, and Orange. Pack quantities of 1, 2, or 5 pieces let you order exactly what you need.

Typical applications include electronics enclosure panels, 3D printer frames, CNC machine guards, laboratory equipment covers, and custom fabrication jigs where tool-free access is required. The anodized finish also suits colour-coded fastener systems in maker spaces and production environments.

⚙️ Thread Compatibility: M5 metric thread. Verify your tapped hole or nut thread pitch (typically M5 × 0.8 mm) before ordering. Shoulder bolt design — thread length is the shank length excluding the head.

✅ Key Features of These M5 Knurled Thumb Screws

🔩 Knurled Cylindrical Head

The textured knurl pattern on the head provides a firm grip for finger-tightening without tools, even with slightly oily or gloved hands.

🪶 Aluminium Alloy Construction

Machined from aluminium alloy, these screws are lightweight yet rigid — reducing load on threaded inserts compared to steel equivalents of the same size.

🎨 Anodized Colour Finish

Ten anodized colour options allow colour-coding by function, zone, or access level — useful in multi-user workshops, production lines, and custom builds.

📏 Seven Length Options (70–100 mm)

Shank lengths from 70 mm to 100 mm in 5 mm steps accommodate varying panel thicknesses and stack-up tolerances without needing custom fasteners.

📦 Flexible Pack Quantities

Available in 1, 2, or 5-piece packs so you can match your exact project requirement — whether a single replacement or a full set for a new build.

🔄 Shoulder Bolt Profile

The shoulder (unthreaded shank) acts as a locating feature, keeping panels aligned during repeated removal and reinstallation cycles.

📐 Technical Specifications — M5 Knurled Thumb Screws

Thread Size M5
Thread Pitch 0.8 mm (standard M5 coarse)
Shank Length (Excluding Head) 70 mm / 75 mm / 80 mm / 85 mm / 90 mm / 95 mm / 100 mm
Head Style Knurled cylindrical (thumb grip)
Material Aluminium alloy
Surface Finish Anodized
Available Colours Royal Blue, Green, Golden, Dark Red, Black, Silver, Purple, Rose Red, Sky Blue, Orange
Pack Quantity 1 Pcs / 2 Pcs / 5 Pcs
Head Diameter See variant options
Head Height See variant options
Drive Method Hand-tighten (no tool required)
Corrosion Resistance Anodized aluminium — suitable for indoor and low-humidity environments

❓ Frequently Asked Questions

What thread pitch do these M5 thumb screws use?

These use the standard M5 coarse thread pitch of 0.8 mm, which is the most common M5 thread found in tapped holes, threaded inserts, and M5 nuts. If your application uses a fine-pitch M5 thread, please contact us to confirm compatibility before ordering.

How do I choose the correct shank length?

Measure the total thickness of the material(s) the screw will pass through, then add the engagement depth of your nut or threaded insert (typically 5–8 mm for M5). Select the next available length that meets or slightly exceeds that total. The shank length listed excludes the head height.

Are these screws strong enough for structural use?

Aluminium thumb screws are designed for panel retention and hand-tightened applications — not high-torque structural joints. They are well-suited for enclosure covers, access panels, and jig fixtures where finger-tight clamping force is sufficient. For load-bearing or vibration-critical joints, a steel fastener with a tool-driven torque is recommended.

Will the anodized finish resist corrosion?

Anodizing creates an oxide layer that improves corrosion resistance compared to bare aluminium. These screws are suitable for indoor environments and low-humidity conditions. For outdoor or high-moisture applications, additional protection or a different material may be more appropriate.

Can I use these with standard M5 nuts and threaded inserts?

Yes. The M5 × 0.8 mm thread is compatible with standard M5 hex nuts, nylon lock nuts, wing nuts, and heat-set or press-fit M5 threaded inserts commonly used in 3D-printed and machined parts.

How do I choose between 1, 2, and 5-piece packs?

The 1-piece pack is ideal for a single replacement or testing fit before committing to a larger quantity. The 2-piece pack suits applications with paired fasteners (e.g., two-point panel retention). The 5-piece pack offers the best per-unit value for new builds or when outfitting multiple access points on the same enclosure.

Does the colour affect the screw's mechanical properties?

No. All colour variants are made from the same aluminium alloy with an anodized finish. The colour is purely cosmetic and does not affect thread dimensions, grip strength, or corrosion resistance. Colour-coding is useful for distinguishing fastener zones or access levels in multi-user environments.

🛒 Select your Screw Size, Colour, and Pack Quantity above, then add to cart.

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