UNC 6 - 32 x 12mm Flat Head Aluminum Thumb Screws — 10 Colors, Anodized Knurled - HomeDIYer

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UNC 6#-32 x 12mm Flat Head Aluminum Thumb Screws — 10 Colors, Anodized Knurled

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Size: 6#-32x12mm

Colors: Wine Red

QTY: 1 Pcs

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$6.94 USD

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In stock (500 units), ready to be shipped

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UNC 6#-32 x 12mm Flat Head Aluminum Thumb Screws — Low-Profile, Anodized, 10 Colors

When panel clearance is tight or you need a fastener that sits flush without protruding above the surface, a standard knurled knob thumb screw takes up too much vertical space. These UNC 6#-32 x 12mm flat head aluminum thumb screws are built for exactly those situations — makers, electronics builders, RC hobbyists, and light-assembly technicians get a low-profile, tool-free fastening solution with a knurled edge that still provides a reliable finger grip.

Each screw is machined from aluminum alloy with an anodized finish and features a flat disc head with a knurled outer edge for hand-tightening. The shank is 12mm (≈15/32") long on the UNC 6#-32 thread standard. Ten anodized colors are available — Wine Red, Rose Red, Golden, Royal Blue, Sky Blue, Black, Silver, Green, Purple, and Orange — and screws are sold in packs of 1, 3, 5, 10, 15, or 20 pieces to match any project scale.

Typical use cases include securing access panels on electronics enclosures and DIY project boxes where a low-profile fastener is needed to avoid interference with adjacent components, fastening body panels on RC cars and drone frames where the flat head profile reduces snagging on cables or covers, and color-coding fastener positions across multi-panel assemblies so disassembly is faster and less error-prone during maintenance or iteration.

🔩 Thread Compatibility: UNC 6#-32 — fits any standard UNC 6#-32 nut, threaded insert, or tapped hole. Shank length is 12mm (≈15/32"). Verify your panel thickness and mating thread depth before ordering.

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

📐Low-Profile Flat Head Design — The flat disc head sits close to the panel surface when tightened, making these flat head thumb screws a practical choice for space-constrained enclosures or builds where a protruding knob would interfere with adjacent parts or covers.
✋Knurled Edge for Tool-Free Use — The knurled outer edge of the flat head provides enough finger grip for hand-tightening and loosening without a screwdriver, making it practical for panels and enclosures that need frequent access.
🎨10 Anodized Color Options — Choose from Wine Red, Rose Red, Golden, Royal Blue, Sky Blue, Black, Silver, Green, Purple, or Orange. Anodized finish integrates into the aluminum surface and generally resists chipping and peeling under normal use.
📦6 Pack Quantities — Up to 20 Pcs — Available in 1, 3, 5, 10, 15, or 20-piece packs. The graduated quantity options let you order exactly what your project requires, from a single replacement to a full set for a new 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 matters.
🔧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.

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

Thread Standard	UNC 6#-32
Thread Diameter	#6 (≈3.5mm / 0.138")
Thread Pitch	32 TPI (threads per inch)
Shank Length	12mm (≈15/32")
Head Style	Flat disc head with knurled outer edge (hand-tighten)
Head Diameter	See variant options
Head Height	See variant options
Material	Aluminum alloy
Surface Finish	Anodized
Available Colors	Wine Red, Rose Red, Golden, Royal Blue, Sky Blue, Black, Silver, Green, Purple, Orange
Pack Quantities	1, 3, 5, 10, 15, 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 ordering.

❓ Frequently Asked Questions

Is 12mm the right shank length for my panel?

Match the shank length to your panel stack-up. The 12mm (≈15/32") shank is generally suited for panels or material stacks in the 6–10mm thickness range, leaving enough thread engagement in the mating nut or insert. If your panel is thinner, a shorter shank may be more appropriate. Always verify your mating thread depth before ordering.

What is the difference between a flat head and a knurled grip knob thumb screw?

A flat head thumb screw has a low-profile, disc-shaped head that sits flush or nearly flush with the surface when tightened, making it a good choice when clearance above the panel is limited or a cleaner visual profile is preferred. A knurled grip knob has a taller, cylindrical head that is easier to grip with fingers for repeated tightening and loosening. Flat head designs are generally preferred in space-constrained enclosures or when a lower-profile fastener is needed.

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 quantity pack should I order?

Count the fastener positions in your project and order accordingly. A 1-piece or 3-piece pack is useful for replacements or small builds. A 5- or 10-piece pack suits most enclosures and panel assemblies. A 15- or 20-piece pack is cost-effective for larger builds or when you want spares on hand for future projects.

Can I use these without any tools?

Yes. The knurled edge on the flat head is designed for tool-free, hand-tightening. The knurled 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.

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