STAINLESS STEEL COUNTERSUNK RIVETS ISO 15984

Countersunk Rivets ISO 15984 — ISO 15984 is the flush-finishing counterpart to the dome-head blind rivet: the head is shaped to pull down level with a pre-countersunk hole rather than standing proud, which matters wherever a raised head would catch on a moving part, disrupt airflow, or spoil a finished surface that will be seen or overlaid. Installation and permanence match the dome pattern exactly - it's set from one side only by pulling the mandrel through the body to form a blind-side head, and once formed the joint can't be separated without drilling it out. The one preparation step that dome rivets don't need is a matching countersink in the fixing hole; without it, the head will either stand proud or pull through the material rather than seating flush, so hole preparation needs to match the specified rivet head angle. Typical uses include enclosure panels, machine guarding, and any sheet metal assembly where a smooth outer face matters more than the slightly higher pull-through resistance a dome head offers at the same shank diameter. Grip range and shank diameter selection follow the same rules as any blind rivet: shank diameter should suit the shear and tensile load expected at the joint, and grip range needs to cover the full combined thickness of material being joined, since running short leaves the mandrel snapping before the blind-side head has fully formed. On grade, A2 stainless covers most general engineering and construction applications; A4 is the better choice for marine, coastal, or washdown environments where chloride exposure would otherwise accelerate pitting corrosion, and where the rivet is joining dissimilar metals, matching or isolating the materials helps avoid galvanic corrosion at the joint over time. ISO 15984 defines the body, mandrel, and countersunk head dimensions for this rivet pattern, ensuring consistent fit and performance across suppliers.

FAQs
Does the hole need to be countersunk before fitting?
Yes, the fixing hole needs a matching countersink so the head seats flush rather than standing proud or pulling through.

What happens if the rivet is set into a hole without a countersink?
The head won't seat flush - it may stand proud like a dome rivet or, in thinner material, pull partway through, weakening the joint, so matching hole prep to the specified head angle matters.

Is a countersunk rivet weaker than a dome rivet of the same size?
Generally yes, marginally - the reduced head bearing area gives somewhat lower pull-through resistance than a dome head at the same shank diameter, though for most panel and enclosure applications this isn't the limiting factor.