What certifications do you have?

We hold ISO9001:2008 and ISO14001:2004 certifications.

How do you ensure product quality?

We perform 100% whole range inspection through production, including visual inspection by packing staff.

What is the warranty or after-sale service?

If there are quality problems, please contact us immediately, and we will help solve the problem as soon as possible.

M4 M7 M14 DIN6921 Serrated Hex Flange Bolt 8.8 Grade Black Oxide

Name: M4 M7 M14 DIN6921 Serrated Hex Flange Bolt 8.8 Grade Black Oxide
Brand: Jiaxing Sini Fastener Co., Ltd.
SKU: 871482385

Zhejiang, ChinaJiaxing Sini Fastener Co., Ltd.

US$1,000.00-1,020.00

1 Ton

Sample price:US$0.20/piece.Request sample

Product profile

Customization

Available

Material

Carbon Steel

Type

Hexagon Head With Flange

Model NO.

Din6921

Connection

Common Bolt

Head Style

Hexagonal

Standard

DIN, ANSI, BSW

Grade

8.8

Application

Machinery, Chemical Industry, Environmental, Building

Finish

Blue-White Zinc Plated

Transport Package

Carton

Origin

China

HS Code

7318150090

Production Capacity

1000 Tons/Year

Key features

Wide Size Range: Available in sizes M4-M52, customizable according to customer requirements.

Multiple Grades: Offers grades 4.8, 8.8, 10.9, 12.9, and A2-70 for diverse strength needs.

Diverse Surface Treatment: Options include Phosphated, Zinc plated, Dacromet, Black, and Passivated finishes.

OEM/ODM Support: OEM and ODM services are available for customized fastener solutions.

100% Quality Inspection: 100% whole range inspection through production ensures high quality standards.

Competitive Pricing: Provides competitive prices with high quality and timely delivery assurance.

Free Sample Availability: Free samples provided if tools are available for testing and evaluation.

Global Export Experience: Exports to North America, South America, Europe, and the Middle East since 2004.

Company profile

R&D CapabilitiesCustomization from Samples100% Finished Products InspectionManagement Certification

Jiaxing Sini Fastener 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: 15 Years CertifiedNearest Port: Shanghai Port; Ningbo PortAverage Response Time: ≤15h

AI-Powered supplier vetting

SummaryThe supplier operates in hardware and mechanical equipment, with stated import/export licensing and products including fasteners. It reports OEM and ODM capability, broad customization options, and manufacturing equipment that includes punching, rolling, deburring, laser cutting, bending, riveting, and hydraulic machines. Export sales account for 90% of total sales, and stated quotation terms include FOB, CFR, CIF, and EXW. However, the available evidence indicates important operational weaknesses: only one production line is reported, there is no valid manufacturing-capacity contract with related subcontractors, no inventory or overseas service infrastructure, no written supplier-service assessment procedure, and no documented corrective-action, complaint-handling, quality-assurance, or traceability systems. No certification information or specific customer cases are provided.

Supplier typeThe supplier is presented as a hardware and mechanical-equipment business, with licensed import/export and technology-import/export activities, plus sales and R&D of hardware products, mechanical equipment, and mechanical components. Its stated product scope includes fasteners such as carriage bolts, indicating a manufacturer/supplier focused on hardware and related mechanical products.

After-Sales capabilityThe supplier has no stated overseas agents or branches, overseas warehouse, overseas showroom, or overseas service countries, and it has no written procedures or records for corrective and preventive actions or customer-complaint handling. These explicit gaps indicate weak documented after-sales and international service infrastructure.

Production capacityThe supplier lists multiple processing machines and reports one production line, a one-month average lead time in both peak and off-season, and 90% export sales. Nevertheless, it lacks a valid manufacturing-capacity contract with related subcontractors, does not continuously reconcile production quantities, has no outsourcing SOP, and has no quality assurance or raw-material traceability, creating material production-control deficiencies.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization through its design and R&D capabilities. It also states that special parts can be manufactured, providing clear evidence of broad customization capability.