Button Head Bolt Sets M3–M8 — A2 Stainless ISO 7380

Why choose these A2 button head bolt sets

A complete bolted-joint kit — each set pairs a low-profile button head bolt (ISO 7380) with a flat washer and your choice of nut. The rounded dome head sits lower than a standard hex bolt for clearance-sensitive jobs, and the Allen-key socket gives clean torque without rounding. A2 stainless steel handles interior, workshop and light outdoor use without rusting.

Sizes available

Bolt diameters M3, M4, M5, M6 and M8 across thirteen length options from 10mm up to 100mm. A nut-only option in M3 is also stocked for replacements.

Pack options

Choose your nut style — wing nut for hand-tightening, nylon lock nut for vibration resistance, or full hex nut for standard joints — in single sample, 2-pack or 5-pack quantities. Mix sizes and styles in one checkout to qualify for free UK delivery on orders over £20.

Typical uses

Equipment panels, AV racks, machinery covers, garden furniture, motorcycle and bicycle brackets, indoor signage, exhibition stand assembly, drone and robotics builds, and any flush-finish bolted joint where a low-profile head is preferred.

How to fit

Drop the bolt through the workpiece, fit the washer to the head side and run the chosen nut down the thread. Drive with a hex (Allen) key while holding the nut with a spanner. Wing nuts allow tool-free release on covers; nyloc nuts give vibration-proof retention. Avoid over-torquing M3 and M4 — A2 stainless is softer than carbon steel.

Delivery

Same-day dispatch on orders placed before 2pm — free UK delivery on orders over £20.