DIN931 Half Thread Hex Bolt, 8.8/10.9 Grade Zinc Plated Metric Hex Head Bolt

Ningbo Gangtong Zheli Fasteners Co., Ltd. manufactures DIN931 Half Thread Hex Bolt, 8.8/10.9 Grade Zinc Plated Metric Hex Head Bolt strictly following DIN931 and ISO4014 international specifications. The raw material selection covers carbon steel SAE1045, 40Cr, as well as stainless steel SS304, SS316. Different strength classes including 8.8, 10.9 and 12.9 can be produced to meet various load requirements from global industrial buyers.

Product Specification Table

Item	Detailed Information
Product Name	DIN931 Half Thread Hex Head Bolt
Applicable Standard	DIN931 / ISO4014
Raw Material	Carbon Steel SAE1045, 40Cr; Stainless Steel SS304, SS316
Strength Class	8.8 / 10.9 / 12.9 Grade
Thread Standard	Metric coarse thread
Available Surface Treatment	Blue white zinc plating, yellow zinc plating, black oxide, stainless steel passivation
Factory Certification	ISO 9001 Quality Management System Certificate

Surface Treatment Comparison: Yellow Zinc VS Blue White Zinc VS Stainless Steel

Yellow zinc plating provides relatively good corrosion resistance and is widely used in outdoor mechanical assembly. Blue white zinc plating offers a clean appearance and is commonly selected for indoor equipment connection. Stainless steel SS304 and SS316 are suitable for humid or corrosive environments, helping to reduce rust formation without additional plating. Buyers may choose different finishes according to the actual service conditions.

Surface Treatment Comparison: Yellow Zinc VS Blue White Zinc VS Stainless Steel VS Black Oxide

Yellow zinc plating delivers reliable anti-corrosion performance and is widely adopted for outdoor mechanical assembly. Blue white zinc plating features a neat, bright surface and cost advantages, suitable for indoor equipment connections. Stainless steel SS304 & SS316 performs excellently in humid and corrosive working conditions without extra electroplating. Black oxide treatment forms a uniform dark protective layer, ideal for applications demanding consistent appearance and moderate anti-rust requirements. Buyers can select proper surface treatment based on practical working environments.

Production Process & Quality Control

All fastener production procedures follow standardized manufacturing and quality control workflows. Raw materials are checked before production, and workpieces go through cold forging, thread rolling, heat treatment, surface treatment and final inspection. Dimension, hardness and visual checks are carried out to help maintain consistent product quality.

Why Choose Ningbo Gangtong Zheli Fasteners Co., Ltd.

1. Production carried out according to DIN931 and ISO4014 standards

2. ISO 9001 certified quality management system

3. Multiple material options available, including carbon steel and stainless steel

4. Customized sizes and surface treatment solutions supported

5. Export experience covering machinery, automotive and construction industries

Global buyers often select DIN931 Half Thread Hex Bolt, 8.8/10.9 Grade Zinc Plated Metric Hex Head Bolt for medium to heavy load connection applications. The half thread design leaves a smooth shank section, which can contribute to better positioning and clamping performance compared with fully threaded bolts. This type of hex head bolt is commonly used in general machinery, commercial vehicle assembly and steel structure installation.

Packing & Shipping Process

Qualified finished products go through a unified sorting and inspection process before delivery. After confirmation, goods are arranged for loading, and necessary documents such as commercial invoice, packing list and certification copies can be provided to support customs clearance.

FAQ

Q1: What is the difference between DIN931 and DIN933 hex bolt?

A1: DIN931 is a half thread hex bolt, while DIN933 is a full thread hex bolt.

Q2: Do you have ISO 9001 certification?

A2: Yes, we hold ISO 9001 Quality Management System certification.

Q3: What materials are available for this hex bolt?

A3: Carbon steel SAE1045, 40Cr and stainless steel SS304, SS316 are available.

Buyers looking for reliable connecting components can source qualified DIN931 Half Thread Hex Bolt, 8.8/10.9 Grade Zinc Plated Metric Hex Head Bolt for long-term industrial assembly requirements. Standard sizes and customized manufacturing solutions are available to meet different engineering needs.