YakGear TGR10 Tri-Grip Aluminum Rivet Kit, 1/8 in, 10-Pack

The YakGear Tri-Grip rivet kit is one of those small parts that quietly makes a rigging job go right. You get ten 1/8 inch aluminum blind rivets, each with a rubber gasket, in a single pack. It's the kind of hardware you reach for when you're mounting deck gear on a kayak, a small skiff, or a center console and you want a clean, sealed fastener that won't back out the first time you hit chop.

What sets a Tri-Grip apart from a plain pop rivet is the grip range. These handle material stacks from 3/16 inch all the way up to 11/16 inch. That's a wide window. So one rivet covers a thin plastic deck pad and a much thicker gelcoat-and-glass laminate without you having to stock three different lengths. The three-piece mandrel design also spreads the clamp load on the back side, which is exactly what you want on hollow or thin material where a standard rivet would pull right through.

The rubber gasket is the part boaters care about most. Mount a rod holder, a rail fitting, or an accessory track on deck and water will find any open fastener hole eventually. The gasket compresses under the rivet head and seals the hole as you set it. We still like to add a dab of butyl tape or marine sealant under the base of whatever you're mounting for a belt-and-suspenders seal, but the gasket does real work on its own.

Where do these shine? Kayak rigging, mostly. YakGear builds gear for paddle-sport folks, and this kit fits right into that world. Think flush rod holders, pad eyes, accessory rails, camera mounts, and deck loops on a plastic or composite hull. They also work great on small fiberglass boats for rail fittings, antenna bases, transducer brackets, and light deck hardware. Anywhere you'd normally reach for a blind rivet and you want a seal, these earn their place.

A few install notes from the water. Drill your hole to match the 1/8 inch rivet body and deburr it clean, because a ragged hole keeps the gasket from seating. On curved fiberglass, keep the drill perpendicular to the surface or the rivet won't set square, and a step bit helps you start clean on a curve. If you're going into a cored or hollow deck where the back side is thin, drop a backing washer behind the material so the rivet clamps against something solid instead of crushing the core. And measure your total stack, including gelcoat, before you set. The grip tops out at 11/16 inch, so if you're at the edge of that range, dry-fit first.

You'll set these with a standard hand riveter or a pneumatic rivet gun. Make sure your tool's nosepiece reaches the minimum 3/16 inch grip so the mandrel pulls fully and the rivet bulbs on the back. That's the whole trick with a blind rivet. The mandrel has to break at the right point for the fastener to clamp down.

One honest word on material. These are aluminum, which is light, easy to set, and friendly on plastic and fiberglass. If you're fastening directly to a bare aluminum hull, isolate the rivet or step up to a stainless fastener so you don't get galvanic corrosion between the two metals. For the deck-rigging jobs most people buy these for, aluminum is exactly right and it won't rust-stain your gelcoat. Ten to a pack means you've got enough for a full rod-holder install or a couple of smaller jobs with spares in the box, which is right where you want to be when a mandrel snaps early and you need a do-over.