A: It depends.If we have bulk goods in stock, we can ship goods within 3 days after the QC process. If we don’t have stock, normally it takes 7-15 days for OEM samples and 20-30 days for bulk goods. If it refers to opening the new mold, it takes an extra 7-15 days to make the mold.
Acorn Nut
Acorn Nut
Standard Spec :DIN917,DIN1587,GB802,GB923,JIS1183
Diameter :M2-M24(2#-1″)
Length:6-100mm
Material:Carbon Steel ,Alloy Steel ,Stainless Steel
Class:4,6,8,10


Acorn Nuts (Cap Nuts): Overview
Material:
- Common materials: Carbon steel (zinc-plated, nickel-coated), stainless steel (304/316), brass, or aluminum.
- Surface treatments: Electroplating (zinc, chrome), hot-dip galvanizing, or passivation (stainless steel) for corrosion resistance and aesthetics.
Manufacturing Process:
- Cold Heading: Forms the nut’s hexagonal base and dome-shaped cap from metal wire.
- Thread Rolling: Internal threads are precision-rolled to match standard bolt sizes (metric/SAE).
- Dome Forming: The cap is shaped using stamping or spinning to create a smooth, rounded finish.
- Heat Treatment: Applied to carbon steel variants for increased hardness (optional).
- Surface Finishing: Coating or polishing to enhance appearance and durability.
Key Production Considerations:
- Dome integrity: Smooth, defect-free surface to prevent snagging and ensure safety.
- Thread accuracy: Ensures seamless compatibility with bolts and screws.
- Material thickness: Balances strength and weight for structural or decorative use.
- Coating uniformity: Prevents corrosion without compromising thread engagement.
Applications:
- Safety-critical assemblies: Playground equipment, gym machines, and automotive trim to cover sharp threads.
- Decorative fixtures: Furniture, lighting, and architectural metalwork for a polished appearance.
- Electrical enclosures: Protects live terminals and prevents accidental contact.
- Marine/outdoor use: Stainless steel or brass nuts for corrosion resistance in harsh environments.
Installation:
- Thread engagement: Hand-tighten the nut onto the bolt until the dome seats fully.
- Torque application: Use a wrench or socket on the hexagonal base to tighten securely.
- Alignment: Ensure the bolt thread is clean and undamaged to avoid cross-threading.
- Final check: Verify the dome fully covers the bolt end and does not rotate freely.
Note:
- Load capacity: Not designed for high-stress applications; prioritize aesthetics and safety.
- Material pairing: Match nut material to the bolt (e.g., stainless steel with stainless bolts).
- Reusability: Can be removed and reinstalled if threads remain undamaged.
Frequently Asked Questions
A: Normally, we make a 30% deposit after Pl confirmation and a 70% balance before shipment. lf order amountis too small, we can also change to 100% deposit in order to save bank handling charge.
A: A pre-bulk sample check can solve this problem to the largest extent. We will arrange production according to the pre-bulk sample quality standard after your confirmation of the samples.
A: We are not only a trading company but also a manufacturer. Our factory mainly focuses on mold design and quality inspection. Our bulk production may come from the factories we have worked with for a long time, and they are all ISO9001 certified. Through this cooperation model, we can not only ensure product quality and service, but also satisfy the diversified product needs of customers, and the price is more advantageous.
A: Yes,we are very glad to offer you samples.
However the express courier cost from our company to your required address will be upon your account.
Usually we use DHL, UPS, FEDEX or EMS as the courier.
It will take 3-7 days to arrive many Europe countries and North America.
Which express courier we will use, it’s up to your convenient or the express charge.
A: No,just part of our capable categories have been showed in our site.
If you are looking for relative industrial products, please feel free to contact us.
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