Are you a manufacturer or trading company?

Sinofastener is a fastener manufacturer in Ningbo China, many years experience in bolts, nuts, threaded rods, washers, OEM/ODM factory, china supplies, zlfastener, hardware producer.

Do you provide OEM/ODM service for fasteners?

Yes, OEM/ODM accepted, custom screws, custom bolts, special nuts, carbon steel and stainless steel fasteners, drawing and sample production, China OEM fastener supplier.

How is your price for screws, bolts and nuts?

High quality fasteners with reasonable price, factory direct price, competitive China supplier, quick quotation after inquiry, sinofastener best cost performance.

How do you control your fastener quality?

QC inspect every production link for each batch, full process control from raw material to packing, provide MTC and mill certificate, stable quality, reliable China fastener manufacturer.

ASTM A325 Structural Bolt and Nut Set Grade 8.8 Heavy Hex

Name: ASTM A325 Structural Bolt and Nut Set Grade 8.8 Heavy Hex
Brand: Ningbo Zhonglian Fastener Manufacture Co., Ltd.
SKU: 2263032555

Zhejiang, ChinaNingbo Zhonglian Fastener Manufacture Co., Ltd.

US$0.01

1,000-999,999 Pieces

US$0.001

1,000,000+ Pieces

Sample price:US$0.10/piece.Request sample

Product profile

Customization

Available

Material

Carbon Steel

Type

Round Head

Model NO.

A325

Connection

Common Bolt

Head Style

Round

Standard

DIN, ANSI, GB, BSW, GOST, Round Head Bolt

Grade

10.9

Application

Machinery, Chemical Industry, Environmental, Building

Finish

Hot Galvanizing

MOQ

1000PCS

Certification

ISO9001

Delivery Time

25 Days

Durability

Enhanced

Sample

Free

Transport Package

25kg/Carton+Pallet

Specification

1/2" M12

Trademark

FAST

Origin

Ningbo, Zhejiang

HS Code

7318159001

Production Capacity

2500 Tons/Month

Key features

High Tensile Strength: Available in Grade 8.8 and Grade 10.9 for superior structural safety.

Customization Available: Custom bolts, nuts, and special designs supported with drawing production.

Hot-Dip Galvanized Finish: Enhanced durability with hot-dip galvanized or zinc plated surface options.

ISO 9001 Certified: Manufacturing process certified under ISO 9001:2015 for quality assurance.

Free Samples: Free samples provided for standard fasteners; new customers cover express cost.

Wide Size Range: Sizes from M12 to M36 with standard lengths ranging from 30mm to 300mm.

Comprehensive Quality Control: Strict QC inspection at every step with MTC and mill certificates provided.

OEM/ODM Service: Full OEM and ODM capabilities for custom screws, bolts, and special nuts.

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: ≤7.25h 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 are your main products?

China fastener manufacturer, bolts, screws, threaded rods, nuts, washers, anchors, rivets, stamping parts, machined parts, sinofastener, zlfastener, hardware, bolt and nut, carbon steel, stainless steel.

Q:How do you ensure quality in every process?

QC inspection every production step, strict quality control, MTC, mill certificate, ISO idea, sinofastener factory inspection, China fastener manufacturer quality assurance.

Q:What is your delivery time for fasteners?

30-45 days delivery time, flexible according to order quantity, China bolts nuts screws lead time, OEM/ODM fastener delivery, Ningbo port shipment.

Q:What are your payment terms?

30% T/T in advance, 70% balance against B/L copy, small order under 1000 USD 100% in advance, reduce bank charges, safe payment, trade assurance, fastener order payment.

Q:Can you provide samples of bolts and nuts?

Free samples for standard fasteners, new customer pay express cost, China bolt nut sample, sinofastener sample policy.