Carbon Steel Flat Head Insert Rivet Nut Blind Semi-Hex Rivnut Nutsert M3–M12

Carbon Steel Flat Head Insert Rivet Nut — Blind Semi-Hex Rivnut Nutsert M3–M12

Carbon steel flat head blind rivet nuts (rivnuts / nutserts) are the economical choice for creating permanent threaded inserts in thin sheet metal, steel panels, and aluminium enclosures where stainless steel is not required. The semi-hex body provides anti-rotation performance, and the flat head sits flush with the panel surface for a clean, low-profile assembly. Suitable for indoor and dry environment applications.

Key Specifications

Why Choose Carbon Steel Rivet Nuts?

• Economical — carbon steel construction provides cost-effective threaded inserts for high-volume sheet metal fabrication and indoor applications
• Flat head (flush) — sits flush with panel surface; no protruding collar; clean, low-profile assembly
• Semi-hex body — anti-rotation geometry prevents spinning during bolt installation
• Blind installation — installs from one side only; no rear access required
• M3–M12 range — covers electronics (M3–M6) through structural sheet metal assembly (M8–M12)

Typical Applications

• Steel sheet metal enclosure and cabinet threaded insert (indoor, dry environments)
• Automotive body panel and chassis threaded insert (M6–M12)
• PC case and server chassis sheet metal fastening (M3–M6)
• HVAC ductwork and steel panel assembly (M6–M10)
• Industrial machinery steel frame threaded insert (M8–M12)
• Furniture and shelving steel frame assembly (M6–M10)

Compatible With

• Standard rivet nut tools / rivnut guns (M3–M12 mandrel sets)
• Sheet materials: mild steel, aluminium, stainless steel (min. 0.5mm)
• Mating bolts: ISO 4762 hex socket cap screws, DIN 933 hex bolts M3–M12
• Note: for outdoor, marine, or humid environments, use 304 or 316 stainless steel rivet nuts instead

Package Contents

• Carbon steel flat head rivet nuts in selected size and quantity (per variant)
• Note: rivet nut installation tool sold separately

Frequently Asked Questions

Q: When should I choose carbon steel rivet nuts over stainless steel?

A: Choose carbon steel rivet nuts for indoor, dry environments where cost is a priority and corrosion resistance is not critical — such as PC cases, indoor control cabinets, and dry industrial machinery. Choose 304 or 316 stainless steel for outdoor, marine, humid, or food processing environments.

Q: Are carbon steel rivet nuts zinc-plated?

A: Yes. Carbon steel rivet nuts are zinc-plated (electroplated) to provide basic corrosion protection for indoor use. The zinc plating is not suitable for outdoor, marine, or high-humidity environments where stainless steel should be used instead.

Q: What is the installation process for rivet nuts?

A: 1) Drill a hole to the correct diameter for the rivet nut size. 2) Insert the rivet nut into the hole. 3) Use a rivet nut tool (rivnut gun) with the correct mandrel to pull the body and collapse the back of the nut, creating a flange that clamps the panel. 4) Remove the tool — the threaded insert is now permanently installed.