A2/A4 Stainless Steel Dome Cap Nut – M6/M8/M10/M12 Hygienic & Anti-Loosening Design
Our A2/A4 Stainless Steel Dome Cap Nut combines sleek aesthetics with industrial-grade performance for applications requiring hygiene, safety, and vibration resistance.
Product Overview
Featuring a smooth, rounded dome cap to prevent snagging and a self-locking nylon insert (optional) for anti-loosening, this nut is ideal for food processing, medical devices, marine equipment, and architectural installations. Crafted from 304 (A2) or 316 (A4) stainless steel, it resists corrosion, bacteria buildup, and harsh chemicals while maintaining a polished, professional appearance.
Key Features
-
Hygienic Dome Cap Design
- Smooth, Crevice-Free Surface: Easy to clean and sanitize, meeting FDA and EU food-contact standards.
- Safety & Aesthetics: Rounded top eliminates sharp edges, ideal for public spaces or high-touch equipment.
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Anti-Loosening Mechanism
- Nylon Insert (Optional): Self-locking action prevents loosening under vibrations (temp range: -40°C to 120°C).
- All-Metal Serrated Flange (Optional): Bites into surfaces for reusable, high-temperature applications.
-
A2/A4 Stainless Steel
- 304 (A2): General corrosion resistance for indoor/outdoor use.
- 316 (A4): Molybdenum-enhanced for marine, chemical, and saltwater environments.
-
Precision Machined Threads
- Metric Coarse/Fine Threads: M6*1mm, M8*1.25mm, M10*1.5mm, M12*1.75mm.
- ISO 3506 Compliant: Reliable tensile strength and thread engagement.
Specification
| Available Material |
1. Stainless Steel: SS303, SS304, SS316, SS410, SS420
2. Carbon steel: C1006,C1010,C1018,C1022,C1035K,C1045
3. Brass: C3602,C3604,Hpb59,Hpb62,Hpb65,Hpb58,Hpb70
4. Aluminum: Al6061, Al6063 etc or as your requirements
|
| Head type |
CSK Head, Pan Head, Truss Head, Hexagon Head, Round Head, Oval Head, Button Head, Cap Head, Cheese Head, etc. |
| Hardness |
Carbon Steel: HRC:28~35, HV450~700
Alloy Steel: HRC:32~39(grade10.9) HRC:39~44(grade12.9)
|
| Finish |
Zinc plated, Nickel plated, Bronze, Copper, Phosphate, Oxidation black, Passivation, Tin, Dacromet, Gold, Chrome, Silver, Phosphorization, Zinc-nickel alloy plated etc. |
| Sample Available |
The sample is free of charge if we have the existing tooling, you only need to pay for the freight cost |
| Delivery time |
Samples time 3-5 working days, Lead time 20-25 working days |
| Pricing Term |
EXW Dongguan(FCA), FOB, CIF, CNF, DDU, etc. |
| Packing |
Bulk in PE bag or Small boxes, then in carton, pallet |
| Payment term |
TT (30% in advance as deposit, balance before delivery), L/C, Western Union, PayPal etc |
| Management system |
ISO9001:2015 |
| Certificate |
ISO, ROHS |
FAQ
Q1: What is your main products and material supply?
A1: Our main products are Electronic screws, Sems screws, Tapping screws, Chicago screws, Shoulder screws etc. Special Non-standard studs, Turning parts and High-end precision complex CNC Machining parts etc.
A2: Carbon Steel, Alloy Steel, Aluminum alloy, Stainless Steel, Brass, Copper, Titanium alloy or according to your requirement.
Q2: When can I get the price?
A: We usually offer you a quotation within 12 hours, and the special offer is not more than 24 hours. Any urgent cases, please contact us directly by phone or send email to us.
Q3: What about the transportation and delivery date?
A: If the weight of goods more than 80kg, Normally we use shipment to transport the orders. It is about 20-30days. If the weight of goods less than 80kg, or there are urgent, we can send the goods via air express, It is 3~5 days.
Q4: What's your packing? What to do in case of damaged goods during transport?
A1: Our Normal packing is bulking in Cartons, less than 20 kgs/carton, 48 cartons / pallet. We also can pack products according to your requirement.
A2: To avoid any subsequent trouble regarding quality issue, we suggest you check the goods once you receive them. If there is any transport damaged or quality issue, don't forget take the detail pictures and contact us as soon as possible, we will properly handle it to make sure your loss to reduce to the smallest.
Q5: Can I get discounts?
A: Yes, for big order, frequent customers, we give reasonable discounts.
Q6: Do you have enough capacity?
A: Our production equipment is a new imported equipment. We have a group of skilled workers who have been working for more than 10 years. Their production experience is very rich and their skills are very skilled. The screws can be 30 million pcs/month. We have sufficient funds to ensure the normal operation of the factory.
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