How to Select Durable DIN931 Half Thread Hex Bolt, 8.8/10.9 Grade Zinc Plated Metric Hex Head Bolt For Industrial Connection?

Ningbo Gangtong Zheli Fasteners Co., Ltd. manufactures DIN931 Half Thread Hex Bolt, 8.8/10.9 Grade Zinc Plated Metric Hex Head Bolt following DIN931 and ISO4014 global industrial standards. Available raw materials cover SAE1045 and 40Cr carbon steel, alongside SS304 and SS316 stainless steel. Factories can produce 8.8, 10.9 and 12.9 strength grades to meet varying load demands from machinery, automotive and construction sectors. Multiple surface treatment options are offered to adapt to diverse working environments.

Product Technical Specification Table

Item	Details
Product	DIN931 Half Thread Hex Head Bolt
Implemented Standards	DIN931, ISO4014
Raw Material	SAE1045, 40Cr Carbon Steel; SS304, SS316 Stainless Steel
Strength Class	8.8 / 10.9 / 12.9 Grade
Thread Specification	Metric Coarse Thread
Surface Treatment	Yellow Zinc Plating, Blue White Zinc Plating, Black Oxide, Stainless Steel Passivation
Qualification	ISO 9001 Quality Management System Certificate

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

Yellow zinc plating delivers balanced corrosion resistance and fits outdoor mechanical assembly. Blue white zinc plating owns a bright surface and cost advantages for indoor equipment connection. SS304 and SS316 stainless steel maintains stable anti-corrosion performance under humid and mild corrosive conditions without electroplating. Black oxide creates a consistent black surface with moderate rust prevention capacity. Every surface finish has unique strengths and limitations, industrial buyers can make selections according to actual application environments.

Manufacturing Process & In-house Quality Control

All fastener production links run under standardized operating procedures. Raw materials receive chemical composition inspection before production. Workpieces go through cold forging, thread rolling, precision heat treatment and surface processing. Finished goods will pass dimensional inspection, hardness testing and visual check. Each batch of products supports traceability via heat numbers to sustain stable quality.

Why Choose Ningbo Gangtong Zheli Fasteners Co., Ltd.

1. Production carried out in strict accordance with DIN and ISO international standards

2. Independent testing laboratory for mechanical property verification

3. Flexible material selection and diversified surface treatment solutions

4. Rich export experience serving global industrial engineering purchasers

Numerous industrial engineering projects adopt DIN931 Half Thread Hex Bolt, 8.8/10.9 Grade Zinc Plated Metric Hex Head Bolt for medium and heavy-load connection work. The half-thread design reserves smooth shank sections, bringing superior positioning and clamping performance compared with fully threaded hex bolts. Mass practical cases verify reliable performance in mechanical equipment assembly and steel structure installation. It is worth noting that carbon steel variants rely on surface coatings to resist rust. Regular maintenance is recommended for long-term outdoor service.

Frequently Asked Questions 

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

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

Q2: Is supporting certification available from the manufacturer?

A2: Yes, the factory holds ISO 9001 certification and can provide relevant certification copies.

Q3: What material options are available for this hex bolt?

A3: Buyers can choose SAE1045, 40Cr carbon steel or SS304, SS316 stainless steel.

Enterprises searching for stable connection hardware can source qualified DIN931 Half Thread Hex Bolt, 8.8/10.9 Grade Zinc Plated Metric Hex Head Bolt to satisfy long-term industrial assembly needs. Standard sizes are in stock, and customized manufacturing is available to satisfy personalized engineering requirements. Purchasers can share working condition parameters with technical teams to confirm the most suitable material and surface treatment scheme.

Shipping Preparation

Qualified finished products will be sorted and rechecked before delivery. After confirmation, goods will be arranged for loading. Documents including commercial invoice, packing list and certification copies can be supplied to support overseas customs clearance.