1/4" to M8 / M10 Thread Adapter Screw — Camera Mount Conversion for Motorcycle Mirror Hole & Tripod Accessories (Stainless Steel) - HomeDIYer

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1/4" to M8 / M10 Thread Adapter Screw — Camera Mount Conversion for Motorcycle Mirror Hole & Tripod Accessories (Stainless Steel)

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Type: 1/4 Female to M8 Male (Stainless Steel)

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$18.99 USD

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In stock (500 units), ready to be shipped

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1/4"-20 to M8 / M10 Thread Adapter Screw — Solve Your Camera Mount Compatibility Problem

If you've ever tried to mount a camera, action cam, or accessory onto a motorcycle mirror hole — only to find the threads don't match — you know how frustrating mismatched thread standards can be. Photographers, videographers, and riders who need to bridge imperial 1/4"-20 camera threads with metric M8 or M10 mounting holes need a reliable, compact solution that just works.

Each adapter is machined from stainless steel with a knurled flange for a secure grip. The body measures Ø15mm (≈0.59") in diameter. Double-ended (male-to-male) variants stand 18mm (≈0.71") tall with two 6.5mm (≈0.26") threaded posts; single-ended (male-to-female) variants measure 20mm (≈0.787") in length. Thread specs: M8×1.25, M10×1.5, and 1/4"-20 UNC. A Ø2.8mm (≈0.11") side hole is included for use with a pin spanner or safety wire. Available in six conversion types to cover the most common imperial-to-metric combinations.

Typical use cases include mounting a GoPro or compact camera to an electric scooter mirror hole using a 1/4"-20 to M8 thread adapter screw, adapting a tripod accessory with a metric M10 stud to a standard 1/4"-20 camera socket, and converting motorcycle rearview mirror mounting holes for dashcam or action camera installations.

🔗 Compatibility: Fits standard 1/4"-20 UNC camera/tripod threads and metric M8×1.25 or M10×1.5 motorcycle mirror / accessory threads. Select your conversion direction from the variant options above.

✅ Key Features of These 1/4" to M8 / M10 Thread Adapter Screws

🔩Six Conversion Configurations — Covers male-to-male and male-to-female combinations across 1/4"-20, M8×1.25, and M10×1.5 threads, so you can adapt in either direction without hunting for multiple parts.
🛡️Stainless Steel Construction — Corrosion-resistant material holds up to outdoor exposure, rain, and the vibration environment of motorcycle and scooter use without rusting or seizing.
✋Knurled Flange Grip — The Ø15mm (≈0.59") diamond-knurled collar gives you a firm finger-tight grip for quick installation and removal, even with gloves on.
📐Compact 18–20mm Profile — The low-profile body keeps your camera or accessory close to the mount point, reducing lever arm and wobble in action camera and dashcam applications.
🔧Side Safety Hole — The Ø2.8mm (≈0.11") lateral hole allows use of a pin spanner for torquing or safety wire for vibration-critical motorcycle installations.
🎯Precise Thread Tolerances — CNC-machined threads engage cleanly with standard 1/4"-20 camera sockets and metric M8 / M10 mirror holes, minimizing play and cross-threading risk.

📐 Technical Specifications — 1/4" to M8 / M10 Thread Adapter

Material	Stainless Steel
Finish	Brushed / natural stainless
Thread Standards	1/4"-20 UNC (imperial) · M8×1.25 · M10×1.5 (metric)
Available Configurations	1/4" Female–M8 Male · 1/4" Female–M10 Male · 1/4" Male–M8 Female · 1/4" Male–M10 Female · 1/4" Male–M8 Male · 1/4" Male–M10 Male
Total Height (male-to-male)	18mm (≈0.71")
Total Length (male-to-female)	20mm (≈0.787")
Flange Diameter	Ø15mm (≈0.59")
Thread Post Length (each end)	6.5mm (≈0.26") — male-to-male variants; 7mm (≈0.275") male end on male-to-female variants
Female Thread Depth	7.5mm (≈0.295") — 1/4"-20 female; See variant options for metric female depth
Side Hole Diameter	Ø2.8mm (≈0.11") — male-to-male · Ø3.0mm (≈0.118") — male-to-female
Quantity per Order	See variant options
Compatible Applications	Camera tripods, action cam mounts, motorcycle / scooter mirror holes, dashcam brackets

⚠️ Before ordering: Confirm the thread direction (male vs. female) and thread size (M8 vs. M10) of both your mounting hole and your accessory. Refer to your vehicle's manual or measure the hole diameter to avoid returns.

❓ Frequently Asked Questions

How do I choose the right thread adapter size?

Check the thread spec on both your mounting hole and your accessory. Common camera tripod sockets use 1/4"-20 (imperial). Motorcycle mirror holes typically use M8×1.25 or M10×1.5 (metric). Match the male end to your accessory and the female end to your mount. When in doubt, measure the hole diameter: M8 ≈ 8mm, M10 ≈ 10mm, 1/4" ≈ 6.35mm.

What thread pitches do these adapters use?

The M8 variants use M8×1.25 pitch and the M10 variants use M10×1.5 pitch — both are the standard coarse-thread pitches for those diameters. The imperial end is 1/4"-20 UNC, the universal camera and tripod standard.

Are these adapters strong enough for camera equipment?

These adapters are machined from stainless steel, which generally provides sufficient strength for compact cameras, action cameras, and lightweight accessories on tripods or motorcycle mounts. For heavy DSLR rigs or high-vibration applications, we recommend verifying the load rating with your specific setup.

Can I use these adapters outdoors or on a motorcycle in the rain?

Yes. Stainless steel is corrosion-resistant and generally suitable for outdoor and wet environments. For long-term motorcycle use in harsh conditions, applying a small amount of anti-seize compound to the threads is typically recommended to prevent galling.

What is the overall size of the adapter?

The double-ended (male-to-male) variants measure 18mm (≈0.71") total height with a 15mm (≈0.59") knurled flange diameter. Each threaded post is 6.5mm (≈0.26") long. The single-ended (male-to-female) variants measure 20mm (≈0.787") in length with the same 15mm (≈0.59") body diameter.

Which variant should I choose for a motorcycle rearview mirror mount?

Most electric scooter and motorcycle mirror holes use M8 or M10 metric threads. If you want to mount a camera accessory with a 1/4"-20 thread into an M8 mirror hole, choose the 1/4" Female to M8 Male variant. If your accessory has a 1/4" male stud and your hole is M10, choose 1/4" Female to M10 Male. Check your bike's manual or measure the hole to confirm.

Do I need any tools to install these adapters?

The knurled flange is designed for finger-tight installation in most cases. For secure mounting — especially on vibrating surfaces like motorcycles — using a wrench or pliers on the flange is generally recommended. A small drop of thread-locking compound can help prevent loosening over time.

🛒 Select your conversion type above, then add to cart — ships from our US warehouse.

1/4" to M8 / M10 Thread Adapter Screw — Camera Mount Conversion for Motorcycle Mirror Hole & Tripod Accessories (Stainless Steel)

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1/4"-20 to M8 / M10 Thread Adapter Screw — Solve Your Camera Mount Compatibility Problem

✅ Key Features of These 1/4" to M8 / M10 Thread Adapter Screws

📐 Technical Specifications — 1/4" to M8 / M10 Thread Adapter

❓ Frequently Asked Questions

1/4" to M8 / M10 Thread Adapter Screw — Camera Mount Conversion for Motorcycle Mirror Hole & Tripod Accessories (Stainless Steel)

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