How do you control quality?

Ningbo Bolt's QC team inspects every production link for each batch of goods, providing Material Test Certificates (MTC) and mill certificates upon completion.

Do you provide free samples?

New customers can receive free samples of standard fasteners, with express charges covered by the client. Existing customers receive free samples with express charges paid by Ningbo Steel Bolt Co., Ltd.

Do you accept small orders?

Yes, Ningbo Steel Bolt Co., Ltd accepts orders of any size and maintains stock for various fasteners, offering quick production.

What is your delivery time?

Goods in stock can be delivered within 15 days, while larger quantities may take 25-35 days for 1-2 containers.

How do you pack your products?

Products are packed in 20-25kg cartons, with 36 or 48 cartons per pallet. Customized packaging with logos is available upon request.

What are your payment terms?

Ningbo Bolt accepts T/T, L/C, and D/P for general orders, and PayPal and Western Union for small or sample orders.

Heavy Duty Black Coated Spring Washers

Name: Heavy Duty Black Coated Spring Washers
Brand: Ningbo Steel Bolt Co., Ltd
SKU: 2116782425

Zhejiang, ChinaNingbo Steel Bolt Co., Ltd

US$0.10-1.00

1,000 Pieces

Product profile

Customization

Available

Type

Spring Washer

Material

Steel

Model NO.

DIN127B

Spring Washer Type

Standard

Packing

Pallets

Standard

DIN

Finish

Plain

Application

Industry

Specification

M20

Origin

Zhejiang, China

Production Capacity

100000 Piece/Pieces Per Month

Key features

OEM/ODM Services: Accepts OEM and ODM services with flexible customization options.

ISO9001 Quality Control: Strict quality management system ensuring 100% qualified products.

Lifetime Warranty: Provides lifetime warranty support for all mechanical defects.

Free Samples for New Customers: New customers receive free standard fastener samples.

Material Test Certificates: Provides MTC and mill certificates for every batch of goods.

Flexible Packaging: Customized packaging with logos available upon request.

Fast Delivery: Stock items delivered within 15 days; larger orders in 25-35 days.

Diverse Payment Terms: Accepts T/T, L/C, D/P, PayPal, and Western Union.

Company profile

High Repeat Buyers Choice

Ningbo Steel Bolt Co., Ltd

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 6 Years CertifiedNearest Port: Ningbo PortAverage Response Time: ≤15h

AI-Powered supplier vetting

SummaryThe supplier is identified as a professional technical supplier and operates as a combined company involved in producing and selling fasteners, hardware products, auto parts, and oil pipeline fittings. It supports extensive product customization, including samples, designs, full customization, minor customization, and flexible customization. The supplier reports two production lines and one presence in a main export market, with an average lead time of one month in both peak and off-season periods. However, it lacks 3D software design services, SDK availability, in-stock capacity, overseas warehouses, overseas agents or branches, and offline trade-show participation. Finished products are checked by packing staff, while no written procedures or records are used for assessing service capability. The provided information does not establish certifications, financial strength, after-sales performance, or customer case history.

Supplier typeThe supplier is explicitly identified as a professional technical supplier. It is a combined company whose stated business scope includes production and sales of fasteners, hardware products, auto parts, and oil pipeline fittings, as well as related import and export activities.

R&D capabilityThe supplier is identified as having professional technical research and development capability, and it offers multiple forms of customization. However, it explicitly does not provide 3D software design services and has no available SDK, so the evidence supports technical customization but not broader digital or software innovation capability.

Production capacityThe supplier reports two production lines, one-month average lead times in both peak and off-season, and six years of exporting experience. Countervailing controls are limited: finished products are checked by packing staff, there is no continuous quantity reconciliation for each batch or production run, no outsourcing SOP, no valid manufacturing-capacity contract with related subcontractors, and no in-stock capacity.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, full customization, minor customization, and flexible customization. This is direct evidence of broad product-design and modification capability, although 3D software design services are not available.

Product Q&A

Q:Are you a manufacturer or trading company?

Ningbo Steel Bolt Co., Ltd is a manufacturer of fasteners with years of experience in producing Bolts, Nuts, Threaded Rods, and Washers in Ningbo, China.

Q:Do you provide OEM/ODM services?

Yes, Ningbo Bolt accepts OEM/ODM services.

Q:How do you guarantee quality?

Ningbo Bolt ensures strict quality control from raw materials to finished products following the ISO9001 quality management system, guaranteeing 100% qualified products with lifetime warranty support.

Q:How can I trust you?

Ningbo Steel Bolt Co., Ltd is a reputable fasteners factory in China, a Gold member of *** and Made in China, with credit guarantees from *** Group. Orders can be placed directly through *** for added security.

Q:What about your pricing?

Ningbo Bolt offers high-quality products at reasonable prices. Contact us for a quote.