introduction to products：

Hex Domed Cap Nuts (DIN1587), also known as acorn nuts or crown hex nuts, feature a hemispherical dome that encloses bolt threads. They’re available in materials like nylon (cost - effective, lightweight, and water - resistant for non - load applications), carbon/alloy steel (high - strength for heavy - duty use), and stainless steel (A2/304 for general corrosion resistance, A4/316 for marine or acidic environments). The dome serves two key purposes: it protects threads from dust, moisture, and physical damage (extending fastener lifespan), and enhances aesthetics by hiding exposed bolt ends. Compliant with the DIN1587 standard, they come in metric sizes (e.g., M4–M36) and are used in automotive trim (wheel hubs, body panels), furniture (chair legs, shelving), construction (exposed fasteners in railings), and machinery (equipment panels) where both functionality and appearance are important.

Instructions for Use：

Screw the DIN1587 hex domed cap nut onto a matching bolt until the dome completely covers the thread end. Tighten using a wrench on the hex sides — avoid over - tightening, as this may deform the dome or damage the threads. Regularly inspect the dome for cracks or dents. For steel/stainless steel nuts, check the coating for scratches and repair with anti - rust paint if needed. For nylon nuts, clean gently (avoid harsh chemicals) and replace if the dome becomes brittle.

Hebei Duojia Metal Products Co., Ltd. was formerly known as Yonghong Expansion Screw Factory. It has over 25 years of professional experience in manufacturing fasteners. The factory is located in the China Standard Room Industrial Base - Yongnan District, Handan City. It conducts online and offline production and manufacturing of fasteners as well as one-stop sales service business.

The factory covers an area of over 5,000 square meters, and the warehouse covers an area of over 2,000 square meters. In 2022, the company carried out industrial upgrading, standardized the production order of the factory, improved the storage capacity, enhanced safety production capacity, and implemented environmental protection measures. The factory has achieved a preliminary green and environmentally friendly production environment.

The company has cold pressing machines, stamping machines, tapping machines, threading machines, forming machines, spring machines, crimping machines, and welding robots. Its main products are a series of expansion screws known as "wall climbers".

It also produces special-shaped hook products such as wood tooth welding sheep eye ring screws and machine tooth sheep eye ring bolts. In addition, the company has expanded new product types from the end of 2024. It focuses on pre-buried products for the construction industry.

The company has a professional sales team and a professional follow-up team to safeguard your products. The company guarantees the quality of the products it offers and can conduct inspections on the grades. If there are any problems, the company can provide professional after-sales service.

Our export countries include Russia, South Korea, Britain, France, Germany, Italy, Canada, Mexico,Brazil, Argentina, Chile, Australia, Indonesia, Thailand, Singapore, Saudi Arabia, Syria, Egypt, Tanzania.Kenya and other countries. Our products will be spread all over the world!

WHY CHOOSE US?

1.As a factory-direct upplier,we eliminate middleman margis to offer you the most competitive pricing for high-quality fasteners.
2.our factory pass the ISO 9001 and AAA certification .we have the hardness testing and the test of zinc coating thickness for galvanized products.
3.with full contrl over production and logistic,we guarantee on-time delivery even for urgnt orders .
4.our engineering team can customize faseners from prototype to mass production , including unique thread designs and anti-corrosion coatings.
5.From carbon steel hex bolts to high-tensile anchor bolts ,we provide a one-stop solution for all your fastener needs.
6.If any defect is found ,we’ll reship replacements within 3weeks  of our cost .