Are you a manufacturer or trading company?

We are a manufacturer with many years of experience in producing bolts, nuts, threaded rods, and washers in Ningbo, China.

Do you offer OEM/ODM services?

Yes, we accept OEM and ODM services for custom fastener requirements.

How can I get a price quote?

We offer high-quality products at reasonable prices. Please send an inquiry, and we will quote you a price immediately for your reference.

Carbon Steel Countersunk Concave Spherical Washer Conical Washer

Name: Carbon Steel Countersunk Concave Spherical Washer Conical Washer
Brand: Ningbo Zhonglian Fastener Manufacture Co., Ltd.
SKU: 2070854695

Zhejiang, ChinaNingbo Zhonglian Fastener Manufacture Co., Ltd.

US$0.50

1,000-99,999 Pieces

US$0.30

100,000-999,999 Pieces

US$0.10

1,000,000+ Pieces

Sample price:US$0.10/piece.Request sample

Product profile

Customization

Available

Material

Carbon Steel,Alloy Steel,Stainless Steel

Type

Customized

Model NO.

Spherical Washer

Head Style

Customized

Standard

DIN, GB

Grade

Customized

Application

Chemical Industry, Building

MOQ

1000PCS

Certification

ISO9001

Delivery Time

25 Days

Durability

Enhanced

Sample

Free

Transport Package

25kg/Carton+Pallet

Specification

customized

Trademark

FAST

Origin

Ningbo, Zhejiang

HS Code

7318151001

Production Capacity

2500tons/Month

Key features

Wide Material Selection: Available in Carbon Steel, Alloy Steel, and Stainless Steel (SS304, SS316).

Customizable Specifications: Head style, type, and grade are fully customizable to meet specific needs.

Multiple Surface Finishes: Options include H.D.G, Self-colour, Dacromet, Geomet, and Polish.

Standard Compliance: Products comply with DIN and GB standards, covering sizes M6-M48.

OEM/ODM Services: We accept OEM and ODM orders for custom fastener solutions.

Quality Assurance: 100% inspection at every production link with MTC and mill certificate provided.

Free Sample Policy: Free standard samples available; express charges covered by supplier for returning customers.

Competitive Pricing: High-quality products offered at reasonable prices with prompt quotation.

Company profile

Ningbo Zhonglian Fastener Manufacture Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedNearest Port: Ningbo Port, Shanghai portAverage Response Time: ≤7.10h CertifiedTerms of Payment: LC, T/T, D/P CertifiedInternational Commercial Terms(Incoterms): FOB, CIF, CFR

AI-Powered supplier vetting

SummaryNingbo Zhonglian Fastener Manufacture Co., Ltd. is identified as a Chinese limited company operating in Zhejiang and producing construction fasteners, including bolts, nuts, screws, washers, and non-standard fasteners. The supplied information shows ISO9001:2015 certification and also references ISO14001, ISOEN14399CE, and ISOEN15048 approvals. Reported manufacturing resources include automatic cold-forging equipment, hot-forging lines, heat-treatment lines, and an inspection center. The company states that it serves international markets and maintains overseas service institutions, but the evidence does not fully establish current service performance. Production information is inconsistent across the slices regarding establishment date, employee count, plant area, and capacity, so scale should be verified. Customization capability is not explicitly demonstrated. Trade records identify buyers in the United Kingdom and Vietnam, but the number of documented transactions is limited.

Supplier typeThe supplier is classified as a combined business entity and limited company in China, with a stated manufacturing address in Zhejiang. Its products, manufacturing equipment, and description identify it as a fastener manufacturer rather than only a trading intermediary.

CertificationsThe supplier explicitly provides an ISO9001:2015 certificate. Its company description also references ISO9001, ISO14001, ISOEN14399CE, and ISOEN15048 approvals, indicating multiple quality, environmental, and product-related certifications or approvals.

After-Sales capabilityThe supplier states that it provides considerate service and has six domestic direct-sale offices plus overseas regional service institutions in Hungary, Dubai, Malaysia, and the UK. These statements support a service network, although no specific after-sales procedures, response standards, or performance evidence are provided.

Production capacityThe supplier reports nearly 100 automatic cold-forging machines, six hot-forging lines, four imported automatic mesh-belt heat-treatment lines, a professional inspection center, and monthly capacity of up to 2,500 tons. It also lists a broad range of fastener products and international standards, providing explicit evidence of substantial manufacturing capability.

Client casesTrade records associate the supplier with CYNTECH ANCHORS LTD in the UK and CÔNG TY TNHH CST INDUSTRIES VIỆT NAM in Vietnam, covering hex screws, hex nuts, and stainless-steel flat washers. These records demonstrate identifiable international buyer activity, but only a small number of transactions are shown.

Product Q&A

Q:What is your main product range?

Our main products are fasteners including bolts, screws, rods, nuts, washers, anchors, and rivets. We also produce stamping and machined parts.

Q:How do you ensure product quality?

Every process is checked by our quality inspection department. We personally inspect products in the factory and request QC to inspect every production link for each batch, providing MTC and mill certificates upon completion.

Q:What is the delivery time?

Delivery time is generally 30 to 45 days, or according to the quantity ordered.

Q:What are the payment terms?

30% T/T in advance and 70% balance against B/L copy. For small orders under 1000 USD, 100% payment in advance is suggested to reduce bank charges.

Q:Can you provide free samples?

Yes, for new customers, we provide free standard samples but clients pay express charges. For old customers, we send free samples and cover the express charges.