For compact, reliable thread inserts in metal sheets, 4-40 rivet nuts offer easy installation and dependable strength. This article highlights five highly relevant rivet-nut options from Amazon sellers, focusing on stainless or carbon steel bodies with zinc plating and passivation finishes. Each entry includes size, material, and outer dimensions to help you compare fit and durability across common sheet-metal applications.
| Product | Brand | Size | Material / Finish |
|---|---|---|---|
| uxcell Self-Clinching Nuts #4-40 x 0.11-Inch Stainless Steel Rivet Nut | uxcell | #4-40 x 0.11″ | Stainless Steel / Passivation |
| uxcell Self-Clinching Nuts #4-40 x 0.12-Inch Stainless Steel Rivet Nut | uxcell | #4-40 x 0.12″ | Stainless Steel / Passivation |
| uxcell Self-Clinching Nuts #4-40 x 0.12-Inch Carbon Steel Rivet Nut | uxcell | #4-40 x 0.12″ | Carbon Steel / Zinc Plating |
| uxcell Self-Clinching Nuts #4-40 x 0.1-Inch Carbon Steel Rivet Nut | uxcell | #4-40 x 0.1″ | Carbon Steel / Zinc Plating |
| uxcell Self-Clinching Nuts #4-40 x 0.12-Inch Stainless Steel Rivet Nut (100pcs) | uxcell | #4-40 x 0.12″ | Stainless Steel / Passivation |
uxcell Stainless Steel Rivet Nut 0.11″ 4-40
Size: #4-40 x 0.11-Inch. Material: Stainless Steel. Surface treatment: Passivation. Outer Diameter(Max): 0.25″; Outer Diameter(Min): 0.16″. Length: 0.11″. This rivet nut is designed for sheet-metal assemblies where a clean stainless finish and corrosion resistance are priorities. The passivation treatment helps minimize rust in damp environments, making it suitable for automotive, electronics, or machinery panels that require a secure thread in thin metal.
uxcell 0.12-Inch Stainless Steel Rivet Nut, 4-40
Size: #4-40 x 0.12-Inch. Material: Stainless Steel. Surface treatment: Passivation. Outer Diameter(Max): 0.25″; Outer Diameter(Min): 0.16″. Length: 0.12″. This option provides a slightly longer body than the 0.11″ version, which can be advantageous for thicker sheets or when a stronger bite is needed. The passivated stainless body resists corrosion while delivering consistent thread engagement in metal sheets.
uxcell Stainless Steel Rivet Nut 0.12″ Carbon Steel Alternative
Size: #4-40 x 0.12-Inch. Material: Carbon Steel with Zinc Plating. Outer Diameter(Max): 0.25″; Outer Diameter(Min): 0.16″. Length: 0.12″. This variant blends a carbon-steel core with zinc plating for cost-effective corrosion resistance. It is suitable for budget-conscious assemblies where moderate mechanical strength and electrical conductivity are acceptable.
uxcell 4-40 Stainless Steel Rivet Nut 0.12″ (100pcs)
Size: #4-40 x 0.12-Inch. Material: Stainless Steel. Surface treatment: Passivation. Outer Diameter(Max): 0.25″; Outer Diameter(Min): 0.16″; Length: 0.12″. A larger quantity option, with identical stainless and passivation specifications, ideal for bulk jobs or ongoing production lines requiring consistent rivet-nut performance across multiple assemblies.
binifiMux 4-40 Hex Nuts Lock Nuts (Not a rivet nut)
Note: This item is listed as a 4-40 UNC hex nut, not a rivet nut. It serves as a traditional fastener for projects requiring a threaded insert into a through-hole or connected nut plate, offering robust stainless steel construction. Consider it for complementary hardware in assemblies that integrate rivet-nut components with standard hex nuts.
Buying Guide: Key Purchase Considerations
- Material compatibility: Stainless steel rivet nuts resist corrosion and are ideal for outdoor or humid environments. Carbon steel variants offer cost savings but require plating or coatings for protection.
- Dimensional fit: Confirm outer diameter, inner thread size (#4-40), and length relative to your sheet thickness. Inadequate length or a mismatched outer diameter can cause poor engagement or failure.
- Finish and corrosion resistance: Passivation and zinc plating extend life in corrosive environments. If you work with aluminum or non-ferrous metals, ensure the nut’s material is compatible to avoid galvanic corrosion.
- Installation method: Most rivet nuts are designed for blind installation using appropriate tooling. Verify your process supports clinching or press-in methods and the required tooling for reliable installation.
- Quantity and supply stability: For production lines, bulk options (such as 100-piece packs) reduce restocking frequency. Check packaging and lead times to align with project schedules.
- Application context: Rivet nuts are ideal for thin metal panels where tapping is impractical. For thicker or reinforced panels, consider longer lengths or alternative threaded-inserts to ensure thread engagement and load distribution.
- Alternatives and complements: Keep a few hex nuts or lock-nut options on hand for assemblies that require redundancy or adjustments after initial rivet-nut installation.
- Cost versus performance: Stainless steel variants offer higher durability and corrosion resistance; carbon steel variants deliver lower cost with adequate protective coatings for interior use.
When selecting rivet nuts, balance material properties, environmental exposure, and the sheet thickness. The five options reviewed here deliver reliable 4-40 threads in stainless or zinc-plated carbon steel, with various lengths to suit different panel thicknesses. For larger projects, grouping by material type and length can simplify inventory and improve installation efficiency.