Cap Nuts (Acorn Nuts) – Safety, Aesthetics & Precision in Fastening
Product Description
Cap Nuts, also known as Acorn Nuts, are hex nuts with a domed top that fully covers the bolt threads. This design not only enhances safety by preventing thread damage or snagging, but also improves appearance, making it ideal for exposed installations.
Our SM Fasteners cap nuts are precision-machined with high-quality materials like Stainless Steel 304/316, Brass, Mild Steel, and come in polished, chrome-plated, and zinc finishes for both decorative and protective purposes.
Applications
Cap Nuts are widely used in industries and applications where protection, finishing, or aesthetics are a concern:
Furniture & Interior Fixtures
Automobile Wheel & Body Assembly
Bicycle and Motorcycle Parts
Architectural Metalwork
Public Seating Installations
Exposed Bolt Connections in Machinery
Playground Equipment & Safety Rails
Technical Specifications
| Parameter | Details |
|---|---|
| Type | Closed-End Dome (Acorn) |
| Standards | DIN 1587, ISO 4032 |
| Material | Stainless Steel, Mild Steel, Brass, Alloy Steel |
| Grades | A2-70, A4-80, MS Grade 5 / 8 |
| Size Range | M4 to M24 | 3/16” to 1” |
| Finish | Polished, Zinc Plated, Chrome, Self-Color |
| Thread Types | Metric / UNC / UNF |
| Features | Anti-Rust, Decorative, Thread Protection |
Why Choose Our Cap Nuts?
✅ Made to DIN & ISO standards for high reliability
✅ Premium finishes for both protection and visual appeal
✅ Ideal for furniture, machinery, and automotive use
✅ Rust-resistant and durable under varied environments
✅ Available in SS304, SS316 & Brass for marine or decorative use
✅ In-stock sizes with quick dispatch capability
Packaging and Delivery
We take utmost care in packaging to prevent scratches or plating damage during transit:
Packaged in sealed polybags, box-packed with separators
Bulk cartons for B2B shipments
Barcoded, labeled & sorted by size and grade
Industries We Serve
Our Cap Nuts are widely trusted in:
Furniture & Fixture Manufacturing
Automobile and Bike Assembly Units
Consumer Hardware Packaging Brands
Marine Hardware Installations
DIY Retailers and Hardware Chains
Architectural and Interior Designers
Playground and Safety Equipment Builders
Documents Supplied
We provide complete documentation for every shipment:
Material Test Certificates (EN 10204 3.1)
RoHS / REACH Compliance Certificate (on request)
Plating Certificate
Packing List + Invoice
Size & Grade Spec Sheet
Request a Quotation
Looking for high-quality Cap Nuts in bulk or retail quantities?
📧 Email: susheel@smfastners.com
📞 Phone: +91 8968469570
💬 WhatsApp: Click to Chat
🔧 SM Fasteners – Covering Threads. Securing Safety. Enhancing Design.