UNC 6 - 32 Aluminum Knurled Thumb Screws — Flat Head, 10 Colors, 3 Lengths - HomeDIYer

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UNC 6#-32 Aluminum Knurled Thumb Screws — Flat Head, 10 Colors, 3 Lengths

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Size(Thread Dia. * Length): 6#-32*5mm

Colour: Wine-Red

Quantity(Piece): 1

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$6.87 USD

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In stock (500 units), ready to be shipped

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UNC 6#-32 Aluminum Knurled Thumb Screws — Tool-Free Panel Fastening in 10 Anodized Colors

Anyone who has fumbled for a screwdriver just to open an electronics enclosure, adjust a 3D printer panel, or swap a battery cover on an RC car knows the frustration of fasteners that slow you down. These UNC 6#-32 aluminum knurled thumb screws are built for exactly those situations — makers, hobbyists, RC builders, and light-assembly technicians get fast, repeatable, tool-free access without sacrificing a clean, finished look.

Each screw is machined from aluminum alloy with an anodized finish and features a flat knurled head approximately 12mm (≈15/32") in diameter. Three shank lengths are available: 5mm (≈3/16"), 10mm (≈3/8"), and 12mm (≈15/32") — all on the UNC 6#-32 thread standard. Ten anodized colors are offered — Wine-Red, Rose-Red, Gold, Royal Blue, Sky Blue, Bright Black, Silver, Green, Purple, and Orange — and screws are sold in packs of 1, 2, 5, 10, or 20 pieces.

Typical use cases include securing access panels on electronics enclosures and DIY project boxes where frequent hand-access is needed, fastening body panels and covers on RC cars and drone frames where tool-free operation saves time, and assembling or adjusting camera rigs and portable equipment where color-coding fastener positions adds a practical organizational advantage.

🔩 Thread Compatibility: UNC 6#-32 — fits any standard UNC 6#-32 nut, threaded insert, or tapped hole. Verify your mating thread and panel thickness before ordering.

✅ Key Features of These UNC 6#-32 Aluminum Knurled Thumb Screws

✋Flat Knurled Head for Tool-Free Use — The flat knurled head (≈12mm diameter) provides a secure finger grip for hand-tightening and loosening, making it practical for panels and enclosures that need frequent access without reaching for a screwdriver.
📏3 Shank Lengths Available — Choose from 5mm (≈3/16"), 10mm (≈3/8"), or 12mm (≈15/32") to match your panel stack-up. Selecting the right length ensures full thread engagement without bottoming out.
🎨10 Anodized Color Options — Anodized finish integrates into the aluminum surface for a durable, color-coded look that generally resists chipping and peeling — useful for organizing and identifying fastener positions across a build.
⚖️Lightweight Aluminum Construction — Aluminum alloy keeps fastener weight minimal, a practical advantage in weight-sensitive builds like RC vehicles, drones, and portable enclosures where every gram counts.
🔧UNC 6#-32 Standard Thread — One of the most widely used thread standards in the US, ensuring broad compatibility with off-the-shelf nuts, inserts, and tapped holes in American-spec hardware and electronics enclosures.
📦Flexible Pack Quantities — Available in 1, 2, 5, 10, or 20-piece packs so you can order exactly what your project requires, whether you need a single replacement or a full set for a new build.

📐 Technical Specifications — UNC 6#-32 Flat Head Knurled Thumb Screws

Thread Standard	UNC 6#-32
Thread Diameter	#6 (≈3.5mm / 0.138")
Thread Pitch	32 TPI (threads per inch)
Available Shank Lengths	5mm (≈3/16"), 10mm (≈3/8"), 12mm (≈15/32")
Head Style	Flat knurled head (hand-grip)
Head Diameter	≈12mm (≈15/32")
Material	Aluminum alloy
Surface Finish	Anodized
Available Colors	Wine-Red, Rose-Red, Gold, Royal Blue, Sky Blue, Bright Black, Silver, Green, Purple, Orange
Pack Quantities	1, 2, 5, 10, 20 PCS
Drive Type	Hand-tighten (no tool required)
Recommended Use	Light-duty panel fastening, electronics enclosures, RC builds, DIY project boxes

⚠️ Note: These are aluminum thumb screws designed for hand-tightening and light-duty applications. They are not intended for high-torque or structural load-bearing use. Verify your panel thickness and mating thread depth before selecting a shank length.

❓ Frequently Asked Questions

How do I choose the right length — 5mm, 10mm, or 12mm?

Match the shank length to your panel stack-up. Measure the total thickness of the material(s) the screw will pass through, then select the next length up to ensure full thread engagement. As a general rule: 5mm (≈3/16") suits thin panels up to about 3mm; 10mm (≈3/8") works for medium panels around 6–8mm; 12mm (≈15/32") is better for thicker assemblies. Always verify your mating thread depth before ordering.

What thread standard is UNC 6#-32, and what will it fit?

UNC 6#-32 is Unified National Coarse thread, #6 diameter (≈3.5mm / 0.138") at 32 threads per inch. It is one of the most common thread standards in the United States and is compatible with any standard UNC 6#-32 nut, threaded insert, or tapped hole. Always verify your mating thread specification before ordering.

How much torque or clamping force can these handle?

These are aluminum thumb screws designed for hand-tightening and light-duty panel fastening. Typical hand-tightening torque for a #6-32 aluminum screw is generally in the range of 2–5 in-lbs. For higher load requirements or structural connections, a steel fastener is recommended.

Can these be used outdoors or in humid environments?

The anodized aluminum finish provides moderate corrosion resistance, making these screws generally suitable for light outdoor or humid-environment use. For prolonged saltwater exposure or heavy-weather conditions, a stainless steel alternative is typically recommended. For most indoor and sheltered outdoor applications, these should perform well.

Do the anodized colors affect performance or durability?

No. The colors are achieved through anodizing, an electrochemical process that integrates into the aluminum surface rather than sitting on top like paint. The finish generally does not chip or peel under normal use and does not affect the screw's mechanical performance. Color-coding can also be useful for organizing or identifying different fastener positions across a build.

What is the head diameter and style?

These feature a flat knurled head with a nominal diameter of approximately 12mm (≈15/32"). The knurled pattern provides a secure finger grip for tool-free tightening and loosening. The flat head profile sits flush or near-flush against the panel surface, keeping the installed profile low — useful in tight enclosures where a domed or raised head would interfere with adjacent components.

Can I use these without any tools?

Yes. The knurled head is specifically designed for tool-free, hand-tightening. The knurled grip surface provides enough friction for finger-tightening in most panel and enclosure applications. If you need a tighter hold than hand-tightening allows, these screws may not be the right choice for that specific application.

How do I pick the right quantity pack?

Count the number of fastener positions in your project and order accordingly. Packs of 1 or 2 are useful for replacements or single-point testing. Packs of 5 or 10 suit most small builds and enclosures. Packs of 20 are cost-effective for larger assemblies or when stocking spares for ongoing projects.

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