Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners

Product Description

★Product Highlights
  • Premium Stainless Steel Corrosion Resistance: Slotted Countersunk Head Bolts in SUS 304/316 deliver ASTM-equivalent pitting resistance—critical for coastal, chemical, and food-grade Bolts & Studs applications across North America.
  • CNS 4420 Precision Engineering: Each Countersunk Head Bolt is manufactured to CNS 4420 (1981) dimensional tolerances—ensuring seamless fitment in OEM assemblies requiring ±0.05 mm head angle and slot depth consistency.
  • ASME B18.6.2-Aligned Drive Reliability: Slotted drive geometry complies with North American torque-transfer benchmarks—minimizing cam-out in high-cycle assembly lines using pneumatic screwdrivers.
  • Zero-Galling Thread Performance: Cold-forged SUS 316 threads maintain >92% tensile retention after 500+ cycles in salt-spray (ASTM B117), outperforming standard 304 in marine-grade Bolts & Studs deployments.
  • RoHS-Compliant Traceability: Full mill-test reports (EN 10204 3.1) accompany every batch—supporting NFPA 5000, IBC, and CSA structural compliance for Countersunk Head Bolts in commercial construction.
◆Competitive Advantages
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
◆Scene Image
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
◆Specifications
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
◆Why Choose Us
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
◆Production Workflow
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
◆Customization Capabilities
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
◆Quality Control
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
◆Company Overview
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
◆Factory Profile
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
◆Packaging & Shipping Specifications
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
◆Trade Show Participation
Slotted Countersunk Bolts Stainless Steel 304/316 CNS A2-70/A4-80 Marine Fasteners
◆About The Supplier

Ningbo Yinzhou Sokun Import And Export Co., Ltd.
Your Trusted Global Partner for Premier OEM Fasteners and Custom Industrial Solutions

Established in 2010, Sokun has evolved into a leading global manufacturer dedicated to providing high-quality fasteners and industrial components at competitive prices. With over a decade of industry experience and a state-of-the-art production facility, we specialize in delivering both standard and non-standard solutions tailored to the rigorous demands of clients worldwide.

Our Expertise and Capabilities:
We are a vertically integrated manufacturer covering production, plating/finishing, and global export. Our extensive product capabilities meet both imperial and metric standards across a wide range of sizes (M1 to M100) and grades (4.8, 6.8, 8.8, 10.9, 12.9).

Our core manufacturing competencies include:
Standard Fasteners: Screws, Nuts, Washers, Anchors, Pins, Keys, Threaded Rods, and Socket Screws.
Materials & Finishes: High-grade Stainless Steel, Carbon Steel, with durable Zinc, Plain, and Galvanized finishing options.

Customization and R&D Strengths (Made-to-Order):
What differentiates Sokun is our robust OEM/ODM capability. We operate primarily on a made-to-order basis, ensuring every batch is freshly manufactured to your exact specifications. Backed by a dedicated in-house R&D department and design team, we excel at engineering specially designed fasteners for unique project needs. If the specific product you require isn't standard, our experienced sales engineers will work with you to manufacture it.

Reliable Production and Service:
We understand that project success relies on component caliber and timely delivery. Through efficient production management, we ensure reliable delivery times for production orders (typically 30-40 days). We are committed to providing extensive cost savings and supply chain security for our customers through consistent quality and dependable lead times.

?Frequently Asked Questions
Q1Do you support custom and non-standard fasteners?

Yes. We specialize in non-standard fasteners manufactured according to drawings, samples, or technical requirements, with tolerance control applied.

Q2Can you supply mixed fasteners based on a BOM or item list?

Yes. We are experienced in handling mixed fastener lists for engineering and project orders. Different items can be combined in one order and one shipment.

Q3What information is required for quotation?

You can send us your BOM list, drawings (PDF / CAD / STEP), or samples. We review items one by one and provide a clear quotation.

Q4Do you accept small or medium batch orders?

Yes. We support prototype, small and medium batch production, especially for custom and non-standard fasteners.

Q5How do you ensure quality for mixed and custom orders?

Each item is inspected during production and before packing. Our quality system ensures accuracy and consistency for mixed fastener orders.

Q6Do you provide material certificates or inspection records?

Yes. Material certificates and inspection records are available upon request. Our quality system is ISO 9001 certified.

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