What materials are used for these bolts?

We use Medium Carbon Steel or Alloy Steel, with grades including ASTM A325.

What is the minimum order quantity?

The minimum order quantity is 10 pieces.

How do you ensure product quality?

We perform 100% inspection using calipers, tensile testers, and other advanced equipment.

2" Black Oxide Hex Bolt

Name: ASTM A325 1/4" 3/4" 1/2" 1-1/2" Black Oxide Hex Bolt
Brand: Shanghai Borui Metal Products Co., Ltd.
SKU: 2240889815

Shanghai, ChinaShanghai Borui Metal Products Co., Ltd.

US$0.04

1,000-9,999 Pieces

US$0.03

10,000-99,999 Pieces

US$0.02

100,000+ Pieces

Product specifications

Diameter

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Material

Medium Carbon Steel/Alloy Steel

Type

Hexagon Head

Model NO.

A325 Hex bolt

Connection

Common Bolt

Head Style

Hexagonal

Standard

DIN, ANSI, GB, JIS, BSW, GOST, En/ASME/ASTM

Grade

A325

Application

Machinery, Chemical Industry, Environmental, Building, Heavy Industry/General Industry

Finish

Black Oxide/Black Zinc

Thread

Unc/Unf

Measurement System

Imperial

Quality Control

100% Inspection

Sample

Sample Avaliable

Deliver Port

China

Delivery Time

30-35days

Service

OEM ODM

Transport Package

Carton+Pallet

Specification

1/4"-4", according to customer request

Trademark

Origin

China

HS Code

731815

Production Capacity

50000PCS/Month

Key features

Wide Standard Compliance: Meets DIN, ANSI, GB, JIS, BSW, GOST, and ASTM standards with custom options.

Customizable Dimensions: Diameter ranges from 1/4 to 4 inches, tailored to customer requests.

OEM and ODM Services: Full customization from samples or designs available for all orders.

Comprehensive Quality Control: 100% inspection with advanced testing equipment including tensile and hardness testers.

Fast Response Time: Customer inquiries and technical support provided within 24 hours.

Flexible Packaging Options: Bulk cartons or custom pallets available to meet specific shipping needs.

Sample Availability: Samples are available for verification before bulk production.

Diverse Application Range: Suitable for structural steel, oil & gas, wind energy, and automotive industries.

Company profile

High Repeat Buyers ChoiceMulti-language PioneerExperienced TeamExhibition Experience

Shanghai Borui Metal Products Co., Ltd.

Shanghai, China

Business Type: Manufacturer/Factory, Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedNearest Port: Shanghai Port, Ningbo PortAverage Response Time: ≤2.07hTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryThe supplier is a Shanghai-based limited trading company with 41 employees, focused on fasteners and related metal, mechanical, plastic, rubber, electrical, and photovoltaic products. It offers sample-, design-, and full-customization services, as well as ODM and OEM services, and reports export sales of 71%–90%. In-stock service is available, but there is no overseas warehouse, showroom, agent, or branch. Financial records are identified for 2022–2024, but no financial values or performance conclusions are provided. Service-process evidence is weak: no written corrective/preventive-action or complaint-handling procedures or records are available, while quality-assurance status and fire-drill status are unknown. No certifications, customer cases, or production facilities are explicitly documented.

Supplier typeThe supplier is identified as a limited company and trading company, with 41 employees, no stated parent-group affiliation, and a Shanghai registered and physical address. Its stated product scope centers on fasteners and related industrial products.

After-Sales capabilityThe supplier has in-stock service capacity, but it has no overseas warehouse, showroom, overseas agent, or branch. More importantly, no written corrective/preventive-action procedures or records and no written customer-complaint procedures or records are available, indicating a documented after-sales process is not demonstrated.

R&D capabilityThe supplier lists research and development of metal products and hardware products, and offers ODM services. However, no SDK is available, and the information does not provide measurable R&D resources, patents, or development outcomes; the documented capability is therefore limited but present.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, and full customization, together with ODM and OEM services for popular brands. These statements provide direct evidence of broad customization and design-manufacturing service capability.