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ROUND BODY WITH KNURLS RIVET NUT

What is a Round Body Rivet Nut?

The Round Body Rivet Nut is the most widely used threaded insert in the world — and for good reason. It installs from one side only into a standard round drilled hole, making it ideal for tubes, panels, enclosures, and any application where you cannot access the back of the material. The knurled (textured) surface on the body bites into the parent material as the rivet nut is set, dramatically increasing grip and resistance to spinning under torque or vibration — a critical requirement in automotive, HVAC, and industrial assembly.

Why the Knurls Matter

A plain round body rivet nut relies purely on friction from the collapsed bulge to stay in place. A knurled body goes further — the raised diamond or cross-hatch pattern on the exterior physically embeds into the hole wall as the fastener is set. This gives you significantly better anti-rotation performance without needing a hex-shaped hole. It makes the round body knurled rivet nut the best choice when you're working with softer materials like aluminium sheet, thin steel, plastic panels, or composite materials where a plain body would spin under load.

Key Advantages

  • Bullet Icon One-Sided Installation — no access to the back of the panel needed. Drill a standard round hole, insert, and set with a rivet nut tool. Done.
  • Bullet Icon Knurled Body for Spin-Out Resistance — the textured surface bites into the parent material under setting load, locking the nut in place against turning forces
  • Bullet Icon Standard Round Hole — no special hex punching or laser cutting required, just a regular drilled hole. Lowest tooling cost of any rivet nut type
  • Bullet Icon Works on Material as Thin as 0.5mm — suitable for thin sheet metal, aluminium, plastic, fibreglass, and carbon composite panels
  • Bullet Icon Variable Screw Length (Open End) — the open end style allows the bolt to pass fully through so screw length can be adjusted freely
  • Bullet Icon Reusable Permanent Thread — once set, it provides a clean internal metric thread that can be assembled and disassembled repeatedly without degrading
  • Bullet Icon Replaces Weld Nuts — no heat, no welding equipment, no distortion of the base material. Faster and cleaner than traditional weld nut assembly

Style

  • Bullet Icon Open End — bolt passes fully through. Best when screw length needs to vary or when using longer bolts in through-applications
  • Bullet Icon Closed End — sealed bottom prevents ingress of water, dust, gas, and chemicals. Essential for outdoor, marine, or pressure-sensitive joints

Flange Options

  • Bullet Icon Large Flange — maximum load distribution over the panel face. Best for thin or soft materials where pull-through is a risk
  • Bullet Icon Reduced Flange — smaller head for tight spaces, recessed areas, or where a lower profile is needed without going fully flush
  • Bullet Icon Countersunk — the flange sits flush with the panel surface for a clean, flat finish. Used in visible or aerodynamic surfaces

Industries & Applications

  • Bullet IconAutomotive body panels, doors, brackets & enclosures
  • Bullet IconHVAC ducting, air handling units & sheet metal fabrication
  • Bullet IconElectronics cabinets, switchgear & electrical enclosures
  • Bullet IconHeavy trucks, trailers & agriculture machinery
  • Bullet IconConstruction equipment & industrial frames
  • Bullet IconBicycles, fitness equipment & recreational products
  • Bullet IconPlastic, fibreglass & composite panel assemblies

Installation Note: Round body knurled rivet nuts install into a standard round drilled hole — no special punching required. Use a manual hand tool for low-volume work or a pneumatic/battery-powered rivet nut tool for high-volume production. Always match the mandrel size to the thread size of the rivet nut for a clean, reliable set.

Round Body Knurled Rivet Nut Steel Stainless Steel M3 to M12 Open Closed End - Excel Trading Corporation Bangalore

Available In

Zinc Plated Steel Round Body Rivet Nut

Steel

Stainless Steel SS304 Round Body Rivet Nut

Stainless Steel

Frequently Asked Questions

What is a round body rivet nut and why does it have knurls?

A round body rivet nut is a one-sided threaded insert that installs into a standard round drilled hole in sheet metal, tubes or panels — no access to the back of the material is needed. The knurled (textured) exterior bites into the parent material as the rivet nut is set, preventing the insert from spinning under torque or vibration. It is the most widely used rivet nut style because it needs only a simple round hole, unlike hex body rivet nuts which require a shaped punch.

What is the difference between round body and hex body rivet nuts?

Round body rivet nuts install into a standard round hole and rely on knurling for anti-rotation grip — the lowest tooling cost of any rivet nut type. Hex body rivet nuts (half hex or full hex) install into a hex-shaped punched hole and get mechanical anti-rotation from the hex profile itself, giving significantly higher spin-out resistance but requiring hex punching tooling. Choose round body for general assembly and lower tooling cost; choose hex body where very high torque or vibration resistance is critical.

Should I choose open end or closed end?

Open end rivet nuts let the bolt pass fully through, so screw length can vary freely — the standard choice for most assemblies. Closed end rivet nuts have a sealed bottom that blocks water, dust and gas ingress through the fastening point, essential for outdoor, marine or pressure-sensitive joints. If sealing isn't a requirement, open end is simpler and more flexible.

What's the difference between large flange, reduced flange and countersunk?

Large flange spreads clamping load over the widest area — best for thin or soft materials at risk of pull-through. Reduced flange has a smaller head for tight spaces or recessed areas. Countersunk sits flush with the panel surface for a clean, flat finish, used on visible or aerodynamic surfaces. Pick based on your surface finish and space constraints, not strength alone — all three carry full thread engagement.

Where can I buy round body rivet nuts in bulk in Bangalore?

Excel Trading Corporation stocks round body knurled rivet nuts in Steel (zinc plated) and Stainless Steel SS304, M3 to M12, at our Kumbarpet store in Bengaluru. We supply automotive, HVAC, electronics and construction fabricators across Karnataka and India-wide. Call +91-9448239476 or use the Enquire Now button for pricing and bulk availability.