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Carbon & 304 Stainless Steel Flat Head Rivnut Nutsert — UNC Imperial Thread 6#-32 to 1/2-13
UNC imperial thread flat head blind rivet nuts (rivnuts / nutserts) create permanent threaded inserts in thin sheet metal and panels using North American UNC (Unified National Coarse) thread standards. Available in both carbon steel and 304 stainless steel, these rivnuts cover the full range of common UNC sizes from 6#-32 (used in PC cases and electronics) through 1/2-13 (structural and industrial applications).
Key Specifications
| Parameter | Value |
|---|---|
| Material | Carbon Steel (zinc-plated) / 304 Stainless Steel (per variant) |
| Head Style | Flat head (countersunk / flush) |
| Body Style | Semi-hex (anti-rotation) |
| Thread Standard | UNC (Unified National Coarse) |
| Thread Range | 6#-32, 8#-32, 10#-32, 1/4-20, 5/16-18, 3/8-16, 1/2-13 |
| Installation | Blind (one-side, rivet nut tool required) |
| Standard | ASME B18.29.3 equivalent |
Why Choose UNC Thread Rivet Nuts?
- UNC imperial thread — compatible with North American standard bolts, screws, and threaded rod; essential for PC case (6#-32), electronics, and North American industrial equipment
- Full UNC range 6#-32 to 1/2-13 — covers PC case and electronics (6#-32, 8#-32) through structural and industrial (3/8-16, 1/2-13)
- Carbon steel & 304 SS options — carbon steel for indoor/dry applications; 304 SS for outdoor, humid, and corrosion-resistant requirements
- Flat head (flush) — sits flush with panel surface; no protruding collar
- Semi-hex body — anti-rotation geometry prevents spinning during bolt installation
Typical Applications
- PC case and server chassis sheet metal UNC threaded insert (6#-32, 8#-32)
- Electronics enclosure UNC threaded insert for North American market equipment
- Automotive body panel and chassis UNC threaded insert (1/4-20, 5/16-18, 3/8-16)
- HVAC and sheet metal ductwork UNC fastening (1/4-20, 5/16-18)
- Industrial machinery and equipment UNC threaded insert (3/8-16, 1/2-13)
- North American standard jig and fixture assembly (1/4-20, 3/8-16)
Compatible With
- UNC bolts and cap screws: 6#-32, 8#-32, 10#-32, 1/4-20, 5/16-18, 3/8-16, 1/2-13
- Standard rivet nut tools with UNC mandrel sets
- Sheet materials: mild steel, aluminium, stainless steel (min. 0.5mm)
- Note: UNC thread is NOT compatible with metric bolts — verify thread standard before ordering
Package Contents
- UNC flat head rivet nuts in selected thread size, material, and quantity (per variant)
- Note: rivet nut installation tool sold separately
Frequently Asked Questions
- Q: What UNC size do I need for PC case mounting?
- A: PC case PSU mounting, HDD bays, and optical drive cages use 6#-32 UNC thread. Motherboard mounting uses M3 metric thread (not UNC). Ensure you select the correct thread standard for your application.
- Q: Can I use UNC rivet nuts with metric bolts?
- A: No. UNC (imperial) and metric threads are not interchangeable. A 6#-32 UNC rivet nut requires a 6#-32 UNC bolt. Using a metric bolt will cross-thread and damage the insert. Always verify the thread standard of your bolts before selecting rivet nuts.
- Q: What is the difference between UNC and UNF thread?
- A: UNC (Unified National Coarse) has a larger thread pitch (fewer threads per inch) and is the standard for general fastening. UNF (Unified National Fine) has a smaller thread pitch (more threads per inch) for precision and vibration-resistant applications. These rivet nuts use UNC thread.


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