DIN1587 Acorn Nut Specifications
Parameter | Details |
Product Name | DIN1587 Hexagon Domed Cap Nut (Acorn Decorative Dust-proof Nut) |
Standard | DIN1587 German Industrial Standard |
Material & Grade | Carbon Steel: Grade 4.8/8; Stainless Steel: A2-70(304), A4-80(316) |
Structure Feature | One-piece Hemispherical Closed Dome, Hex Fastening Structure, Full Thread Wrapping, No Sharp Edges |
Surface Finish | Blue-white Electro-galvanized Zinc, Black Oxide, Mirror Polishing, Stainless Steel Passivation |
Size Range | M4-M24 Full Sizes In Stock, Custom Orders Available |
Core Function | Dust-proof, Moisture-proof, Anti-rust, Thread Protection, Decoration, Anti-scratch |
Application | Guardrail Engineering, Architectural Decoration, Fitness Equipment, Furniture Hardware, Auto Parts, Outdoor Facilities |
Certification | ISO9001, Material Test Report, Dimensional Inspection, Salt Spray Test, Batch Quality Certificate |
Package | Standard Export Carton & Pallet, Neutral Packaging & OEM Service |
Delivery Time | 3-7 days for stock items, 15-20 days for bulk customized orders |
DIN1587 Product Core Advantages
Fully Enclosed Dome Structure, Full Thread Protection
Different from ordinary hex nuts, DIN1587 domed cap nuts adopt an integrated fully enclosed hemispherical design, which completely covers exposed bolt threads. It effectively isolates air, rainwater, dust and oil pollution, preventing thread rust, clogging and corrosion failure. It greatly extends the service life of mechanical fastening parts with far better protection performance than flat mouth nuts.
High Decorative Value for Exposed Installation
The smooth arc top eliminates sharp edges and corners, solving the rough appearance and scratch hazard of exposed thread installation. With delicate polishing and galvanized finishes, it presents excellent metallic texture, combining practical fastening performance and aesthetic decoration, ideal for exposed equipment and decorative engineering.
Full Grade & Process Coverage for All Scenarios
Covers Grade 4.8 economical type, Grade 8 high-strength type, 304 conventional anti-corrosion and 316 high-end anti-corrosion full series. Equipped with diversified surface processes to adapt to indoor dry, outdoor open-air, humid rainy and mild acid-base environments, meeting civil decoration and industrial fastening needs in one stop.
High Precision & Strong Universality
Manufactured strictly according to DIN1587 German standards with 6H precision thread tolerance. The full thread profile ensures smooth meshing and strong compatibility with all standard bolts and screw rods. Uniform batch size accuracy supports automatic assembly and manual installation without jamming or slipping.
Grade 4.8 Carbon Steel DIN1587 Nut (Civil Decoration Bulk Type)
Made of high-quality carbon steel with moderate hardness and stable fastening performance. Featuring ultra-high cost performance with electro-galvanized and polished finishes. Mainly used for civil decoration scenarios such as furniture hardware, indoor equipment, light guardrails and fitness equipment, serving as the best-selling product for foreign trade retail and domestic supporting.
Grade 8 Carbon Steel DIN1587 Nut (Industrial Heavy-duty Type)
Reinforced by quenching and tempering treatment, it has improved mechanical strength, extrusion resistance and fatigue resistance. It is not easy to deform or slip under load. Suitable for outdoor steel structures, engineering guardrails and medium & light mechanical heavy-duty fastening, integrating protection, decoration and high load-bearing performance.
304 Stainless Steel DIN1587 Nut A2-70 (General Anti-corrosion Type)
Authentic 304 stainless steel with non-magnetic, anti-oxidation and anti-rust properties. It resists humid air, rain erosion and mild acid-base corrosion. Widely used in outdoor open-air projects, garden equipment, water treatment equipment and humid workshop assembly, maintaining long-term non-rust and non-discoloration performance.
316 Stainless Steel DIN1587 Nut A4-80 (High-end Anti-corrosion Type)
Molybdenum-containing 316 stainless steel provides superior salt spray, acid and alkali corrosion resistance compared with 304. It adapts to extreme harsh environments such as coastal salt spray, chemical corrosion and high temperature & humidity. With high mechanical strength and oxidation resistance, it is widely applied in marine equipment, chemical machinery and high-end outdoor decorative projects.
Production Process
Graded Material Selection: Classify raw materials by carbon steel and stainless steel grades, strictly control material composition and mechanical properties to ensure consistent batch quality.
Automatic Cold Heading Forming: One-piece multi-station cold heading forming ensures regular hexagon shape and full rounded dome top without gaps or deformation defects.
Precision Tapping Process: Professional precision tapping equipment ensures standard thread profile and qualified go/no-go gauge, realizing smooth meshing with standard bolts.
Deburring & Shaping: Fine polishing of all edges and corners ensures smooth and burr-free appearance, avoiding scratching hazards.
Graded Heat Treatment: Exclusive tempering process for Grade 8 carbon steel to optimize hardness and toughness and improve structural strength and fatigue resistance.
Custom Anti-corrosion Treatment: Complete electro-galvanizing, black oxide, mirror polishing and stainless steel passivation to meet different anti-rust and aesthetic requirements.
Full-batch Precision Inspection: Strictly test dimension accuracy, thread qualification and surface quality batch by batch, providing complete factory certification reports.
Application Industries
Guardrail Engineering: Dust-proof, anti-rust and decorative fastening for exposed threads of municipal guardrails, balcony guardrails and fence facilities.
Furniture Hardware: Decorative assembly of solid wood furniture, iron art furniture and outdoor leisure furniture to improve product texture.
Fitness & Amusement Equipment: Dust-proof and beautifying fastening for outdoor fitness equipment and children amusement facilities.
Architectural Decoration: Decorative protection and fastening for curtain wall decoration and steel structure decoration projects.
Automotive Parts: Anti-rust and decorative fixing for exposed threads of automobile and electric vehicle parts.
Outdoor Mechanical Equipment: Thread protection for garden machinery and open-air equipment to extend service life.
Why Choose Our DIN1587 Acorn Nuts
We specialize in the production of German standard fasteners for many years, focusing on mass production of DIN1587 hexagon domed cap nuts. Our full product range covers Grade 4.8/8 carbon steel and 304/316 stainless steel. All products comply with DIN1587 standards with precise threads, neat structure and excellent appearance. Featuring dust-proof, anti-rust, anti-scratch and decorative functions, it serves both civil decoration and industrial fastening scenarios. We have sufficient stock, support customized processes and bulk orders, and can provide complete test reports to offer reliable decorative & protective fastening solutions for global buyers.
If you are looking for high-quality DIN1587 domed cap nuts, Grade 4.8/8 decorative acorn nuts and stainless steel anti-corrosion cap nuts, feel free to contact us for professional technical support and accurate quotation.
