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Screws City M8 Butterfly Wing Screws Review: Handy replacements for workshop knobs

M8 (8mm x 20mm) Butterfly Wing Screws Thumb Screws Wing Bolts Steel (Pack of 10) A06BC
4.7
[M8 Metric Thread]  8mm diameter conforms to M8 metric standards for broad compatibility.
[Fine Thread Pitch]  1.25mm pitch delivers precise engagement and improved clamping strength.
[20mm Length]  20mm length suits medium-thickness components and ensures secure fastening.
[Consistent Fit]  Precision threading provides reliable alignment and repeatable installations.
[Wide Application Range]  Ideal for automotive, electronics, industrial and DIY fastening tasks.
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Workshop fasteners designed for quick hand-tightening and reliable M8 thread engagement, Screws City M8 Butterfly Wing Screws. Greater control during adjustments reduces time spent swapping spanners and fiddling with knobs. Are they the right solution for replacing worn plastic toppers and securing jigs around the bench?

⚡ At a Glance
  • Holding Strength: Consistent M8 thread engagement with dependable hand-tightening performance
  • Best for: Workshop benches, jigs and replacing worn plastic toppers on machinery
  • Not ideal for: High-torque or tamper-proof applications where tool-only fastenings are required

Steel wing-head thumb screws in M8 size, 8mm diameter with 1.25mm pitch and 20mm length. Supplied as a pack of 10 for multiple replacements or projects.


Tool-free tightening – with wing head for finger torque

Wing-style head and thumb screw form allow tightening and loosening by hand without tools. Steel construction gives the head enough rigidity for regular manual use.

Quick adjustments and repeated setups become faster, ideal for clamping jigs or swapping fixtures without reaching for spanners.

Reliable fit with standard M8 threading – thanks to 8mm diameter and 1.25mm pitch

Thread measurements are specified as 8mm diameter with a 1.25mm pitch, matching common M8 nuts and threaded posts. Accurate thread form ensures predictable engagement and reduces cross-threading risk.

Direct replacements for M8 fittings save time when refreshing worn knobs or retrofitting equipment, giving a snug, repeatable connection.

Durable replacement for plastic toppers – with steel construction

Steel material limits deformation and wear compared with plastic heads under repeated hand torque and workshop conditions. The 20mm length provides a compact profile suitable for many bench-mounted applications.

Safer and more professional-looking than brittle plastic knobs, making them suitable for saw benches, jigs and frequently adjusted fixtures.

✨ The 4 Key Reasons for Screws City M8 Butterfly Wing Screws

M8 thread (8mm) – Ensures direct fit on M8 bolts and threaded posts

1.25mm thread pitch – Provides consistent engagement with M8 nuts and fixtures

Wing head design – Allows hand tightening without tools for quick adjustments

Pack of 10 – Supplies multiple fastenings for benches, jigs and repeat tasks

📋 Technical Details at a Glance
  • Category: BISS
  • Brand: Screws City
  • Type: Butterfly wing / thumb screw
  • Thread Diameter: 8mm
  • Thread Pitch: 1.25mm
❓ Frequently Asked Questions

Q: Are these standard M8 threads?

A: Yes. Thread diameter is specified as 8mm with a 1.25mm pitch, matching standard M8 fittings.

Q: Can these replace plastic toppers on a chopsaw bench?

A: Customer feedback notes they work well as replacements for plastic toppers on a chopsaw bench, offering a more professional and durable finish.

Q: Do they require tools to tighten?

A: No. The wing/ thumb head design allows hand tightening and loosening without tools for quick adjustments.

🏆 Our Verdict

The Screws City M8 Butterfly Wing Screws are well suited to workshop users who need quick, repeatable hand-tightened fixings for benches, jigs and machines. Steel construction combined with standard M8 threading delivers a more robust, professional alternative to plastic knobs. Given the pack quantity and durable materials, they represent a practical long-term choice for frequent workshop use.